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2013 GMC Sierra 2500

Owner reports · Recalls · Investigations

Similar to other model years

Owner complaints for the 2013 GMC Sierra 2500 do not stand out strongly from the model-year median of 46.

About this comparison →

How this year compares

Owner complaints by model year

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Counts vary with age, sales and reporting. They are not failure rates.

What owners reported most

All reported categories

Tap a category to read its complaints. One report may name several components.

When problems were reported

Mileage at the reported incident

24 reports with mileage · 22 unknown

NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.

What to inspect

Issues worth paying extra attention to based on owner reports.

  • Air Bags. Review the 7 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Fuel/propulsion System. Review the 7 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Power Train. Review the 5 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

1 crash reports0 fire reports0 injury reports

Unknown Or Other complaints

14 reports
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Mileage unknown · Aug 24, 2023
Unknown Or Other

I was driving and the transmission control module failed, putting the truck into limp mode with no prior warning. This was a hazard to myself and other drivers as it happened on a very busy road. I use this truck to pull our fifth wheel camper and luckily we were not pulling the camper at that time or this could’ve been a lot wo…

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I was driving and the transmission control module failed, putting the truck into limp mode with no prior warning. This was a hazard to myself and other drivers as it happened on a very busy road. I use this truck to pull our fifth wheel camper and luckily we were not pulling the camper at that time or this could’ve been a lot worse with the truck just stalling putting my families safety at risk and being broke down in the middle of nowhere. I took the truck to a repair shop in the city that I live in and it was confirmed that the TCM was bad. Tried to order a new TCM and they are back ordered for months and even over a year. Had to send it into a company in South Carolina for repair of the TCM with a cost of approximately $1300. There are thousands of people with this issue, and this should’ve been addressed by GM and a recall sent out to the owners of the vehicles. After the truck went into limp mode, there was a error message but no other prior warning.

NHTSA ODI #11540468

Mileage unknown · May 18, 2023
Unknown Or Other

The TCM failed while my husband was driving the pick up and this also set off the posi traction control and stabilization link. The truck has fluctuating shifting and could have cause a wreck if there had been someone behind him because the speed dropped on the tuck and it the transmission can't shift properly or consistently …

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The TCM failed while my husband was driving the pick up and this also set off the posi traction control and stabilization link. The truck has fluctuating shifting and could have cause a wreck if there had been someone behind him because the speed dropped on the tuck and it the transmission can't shift properly or consistently for safe driving. The part has been on nationwide backorder for over a year.. this truck can not function properly with out this part. Calling the dealership there are many vehicles affected with this problem and no estimates time of part arrival replacement. The dealership knew exactly what the problem was when called but didn't recommend dropping the truck off as there are no ETA on replacement. Their recommendations is to research online to try to have the part repaired. No the part has not been inspected as it it unsafe to drive at the moment and there are no available replacement parts for the TCM at this time. The warning lights did not come on until the part failed to allow the transmission to shift. Per some people on a face book group this has apparently been a known issue with this part since 2011.

NHTSA ODI #11522670

Mileage unknown · Jun 19, 2022
Unknown Or Other

Dash is cracked in multiple places. Dash is not structural however loose shards of plastic pose a serious safety hazard if they were to come loose as a the result of a sudden change in acceleration. Vehicle is low milage with 130k miles, previous owner failed to report or repair the failed dash prior to my ownership. It is a com…

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Dash is cracked in multiple places. Dash is not structural however loose shards of plastic pose a serious safety hazard if they were to come loose as a the result of a sudden change in acceleration. Vehicle is low milage with 130k miles, previous owner failed to report or repair the failed dash prior to my ownership. It is a common failure on GM vehicles however it is very expensive to repair, unwarranted, yet poses a serious safety hazard. Dash will need to be repaired to ensure the safety of me and my family.

NHTSA ODI #11469979

Mileage unknown · Feb 26, 2021
Unknown Or Other

I PURCHASED A VEHICLE THAT WAS ADVERTISED AS HAVING 52000 MILES ON THE ODOMETER. I LOOKED AT THE VEHICLE AND ENDED UP PURCHASING THE VEHICLE FOR 24,500. THE VEHICLE WAS AS IT APPEARED AS ADVERTISED. THE SELLER PROVIDED A COPY OF A CARFAX REPORT WHICH SHOWED THE VEHICLE HAD 52000 MILES ON IT WITH NO DAMAGE REPORTED, HOWEVER I WAS…

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I PURCHASED A VEHICLE THAT WAS ADVERTISED AS HAVING 52000 MILES ON THE ODOMETER. I LOOKED AT THE VEHICLE AND ENDED UP PURCHASING THE VEHICLE FOR 24,500. THE VEHICLE WAS AS IT APPEARED AS ADVERTISED. THE SELLER PROVIDED A COPY OF A CARFAX REPORT WHICH SHOWED THE VEHICLE HAD 52000 MILES ON IT WITH NO DAMAGE REPORTED, HOWEVER I WAS UNABLE TO RUN MY OWN CARFAX AT THE TIME OF PURCHASE DUE LACK OF INTERNET ACCESS. LATER ON AFTER THE PURCHASE I WAS ABLE TO LOOK UP MY OWN CARFAX AND IT SHOWED THAT THE VEHICLE HAD 314,635 MILES AS THE LAST ODOMETER READING AS WELL AS MODERATE DAMAGE REPORTED. I CHECKED ON AUTOCHECK AS WELL AND THE SAME MILES APPEARED BUT DAMAGE WAS NOT REPORTED IN THIS INSTANCE. I VIEWED THE PINK SLIP AT THE TIME AS WELL AND IT APPEARED TO BE LEGITIMATE BUT AFTER CLOSER VIEWING WHERE THE LAST ODOMETER READING WAS WRITTEN IT LOOKED AS IF HE HAD FORGED THE NUMBERS AND CHANGED THEM. I AM UNSURE AS TO WHAT TO DO AT THIS POINT. I DO NOT KNOW HOW MILES ARE ON THE VEHICLE AND I DON'T KNOW IF THERE'S ANYTHING ELSE WRONG OR FRAUDULENT REGARDING THIS. IT WOULD BE GREATLY APPRECIATED IF I HAD SOMEONE HELP ME OUT. THANK YOU.

NHTSA ODI #11398001

27,900 miles · Oct 16, 2020
Unknown Or Other

MY VEHICLE HAS 28,000 MILES ON IT AND MY DASH IS CRACKING. IT STARTED CRACKING WHILE ON A CROSS COUNTRY TRIP FROM CALIFORNIA TO GEORGIA. IT IS CRACKING IN SEVERAL PLACES AND I AM AFRAID THE PLASTIC LIKE SHARDS COULD BECOME PROJECTILES IF INVOLVED IN A COLLICION.

NHTSA ODI #11364684

17,250 miles · May 24, 2020
StructureUnknown Or Other

DASH CRACKS AROUND AIR BAG ALWAYS BEEN GARAGED. *TR

NHTSA ODI #11325736

Mileage unknown · Apr 20, 2020
Unknown Or Other

MY DASH IS CRACKED AROUND MY PASSENGER SIDE AIR BAG A AND DROPPED DOWN A LITTLE BIT MY CONCERN IF THAT AIR BAG WOULD OPEN IT COULD BE A DANGER TO ME AND WHO EVER WOULD BE RIDDING WITH ME. AND ON TOP OF THAT IT NOW RATTLES WHILE DRIVING WHICH IS A DISTRACTION,THIS STARTED ABOUT 2 YEARS AGO AND IS GETTING WORST.

NHTSA ODI #11321658

79,530 miles · Jul 22, 2019
Electrical SystemSteeringUnknown Or Other

SERVICE STABILITRAK WARNING LIGHT CAME ON WHILE DRIVING ON HIGHWAY AT 60MPH. TRUCK WENT INTO "LIMP MODE" . NO TRANS PRIDAL DISPLAY. TRUCK DRIVEN SLOWLY OFF HIGHWAY. AT THE SERVICE DEALER THEY DETERMINED THAT THE TRANSMISSION CONTROL MODULE FAILED AT 79,530 MILES. VEHICLE COVERED UNDER THE FEDERAL EMISSIONS WARRANTY 8 YEAR/ 80,0…

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SERVICE STABILITRAK WARNING LIGHT CAME ON WHILE DRIVING ON HIGHWAY AT 60MPH. TRUCK WENT INTO "LIMP MODE" . NO TRANS PRIDAL DISPLAY. TRUCK DRIVEN SLOWLY OFF HIGHWAY. AT THE SERVICE DEALER THEY DETERMINED THAT THE TRANSMISSION CONTROL MODULE FAILED AT 79,530 MILES. VEHICLE COVERED UNDER THE FEDERAL EMISSIONS WARRANTY 8 YEAR/ 80,000 HOWEVER GM REFUSED TO HONOR.

NHTSA ODI #11234009

58,000 miles · Nov 12, 2018
Unknown Or Other

TOP OF DASH BOARD IS CRACKED IN NUMEROUS PLACES ABOVE THE STEERING WHEEL, CENTER OF DASHBOARD, AND AROUND PASSENGER AIRBAG. WORRIED THAT THIS WOULD BE A SAFETY CONCERN IN THE EVENT OF AN ACCIDENT. THERE WOULD BE SHARP PIECES OF DASH BOARD BEING THROWN AROUND THE CAB AND MIGHT AFFECT DEPLOYMENT OF PASSENGER AIR BAG. I HAVE ADDIT…

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TOP OF DASH BOARD IS CRACKED IN NUMEROUS PLACES ABOVE THE STEERING WHEEL, CENTER OF DASHBOARD, AND AROUND PASSENGER AIRBAG. WORRIED THAT THIS WOULD BE A SAFETY CONCERN IN THE EVENT OF AN ACCIDENT. THERE WOULD BE SHARP PIECES OF DASH BOARD BEING THROWN AROUND THE CAB AND MIGHT AFFECT DEPLOYMENT OF PASSENGER AIR BAG. I HAVE ADDITIONAL PHOTOS BUT THEY ARE OVER THE 5MB LIMIT

NHTSA ODI #11150959

Mileage unknown · Aug 27, 2018
Air BagsUnknown Or Other

CRACKED DASH GOING FROM THE PASSENGER SIDE AIRBAG COVER TO THE DASH VENT. ALSO, THE MOUNTING BRACKET FOR THE SAMES VENT CLIP IS BROKEN CAUSING THE DASH COVER TO BOUNCE AROUND.

NHTSA ODI #11122786

Official recalls

3

21V053000 · Air Bags:frontal:passenger Side:inflator Module

Feb 5, 2021

General Motors, LLC (GM) is recalling certain 2013 Cadillac Escalade, Escalade ESV, and Escalade EXT, Chevrolet Avalanche, Silverado 1500, Silverado 2500/3500, Suburban, Tahoe, GMC Sierra 1500, Sierra 2500/3500, Yukon, and Yukon XL vehicles originally sold, or ever registered, in the states of Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands or "Zone A." Additionally, GM is recalling certain 2010 Cadillac Escalade, Escalade ESV, and Escalade EXT, Chevrolet Avalanche, Silverado 1500, Silverado 2500/3500, Suburban, Tahoe, GMC Sierra 1500, Sierra 2500/3500, Yukon, and Yukon XL vehicles originally sold, or ever registered in the states of Arizona, Arkansas, Delaware, District of Columbia, Illinois, Indiana, Kansas, Kentucky, Maryland, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, Tennessee, Virginia, and West Virginia or "Zone B." Additionally, GM is recalling certain 2009 Cadillac Escalade, Escalade ESV, and Escalade EXT, Chevrolet Avalanche, Silverado 1500, Silverado 2500/3500, Suburban, Tahoe, GMC Sierra 1500, Sierra 2500/3500, Yukon, and Yukon XL vehicles originally sold, or ever registered, in the states of Alaska, Colorado, Connecticut, Idaho, Iowa, Maine, Massachusetts, Michigan, Minnesota, Montana, New Hampshire, New York, North Dakota, Oregon, Rhode Island, South Dakota, Utah, Vermont, Washington, Wisconsin, and Wyoming or "Zone C."

Consequence & remedy

Consequence: An inflator explosion may result in sharp metal fragments striking the driver or other occupants, resulting in serious injury or death.

Remedy: GM will notify owners, and dealers will replace the front passenger air bag inflator with an alternate one, free of charge. Interim letters notifying owners of the safety risk were mailed on February 24, 2021. Second notification letters will be mailed once the remedy is available. Owner notification letters were mailed on May 11, 2021. Owners may contact Cadillac customer service at 1-800-458-8006; Chevrolet customer service at 1-800-222-1020; and GMC customer service at 1-800-462-8782. GM's number for this recall is N212328790.

21V054000 · Air Bags:frontal:passenger Side:inflator Module

Feb 5, 2021

General Motors, LLC (GM) is recalling certain 2014 Cadillac Escalade, Escalade ESV, Chevrolet Silverado 2500, Silverado 3500, Suburban, Tahoe, GMC Sierra 2500, Sierra 3500, Yukon, and Yukon XL vehicles originally sold, or ever registered, in the states of AL, CA, FL, GA, HI, LA, MS, SC, TX, PR, AS, GU, the MP, and VI or "Zone A." Additionally GM is recalling certain 2011-2014 Cadillac Escalade, Escalade ESV, Chevrolet Silverado 2500, Silverado 3500, Suburban, Tahoe, GMC Sierra 2500, Sierra 3500, Yukon, Yukon XL and 2011-2013 Cadillac Escalade EXT, Chevrolet Avalanche, Silverado 1500, and GMC Sierra 1500 vehicles originally sold, or ever registered, in the states of AZ, AR, DE, DC, IL, IN, KS, KY, MD, MO, NE, NV, NJ, NM, NC, OH, OK, PA, TN, VA, and WV or "Zone B." Additionally, GM is recalling certain 2010-2014 Cadillac Escalade, Escalade ESV, Chevrolet Silverado 2500, Silverado 3500, Suburban, Tahoe, GMC Sierra 2500, Sierra 3500, Yukon, and Yukon XL and 2010-2013 Cadillac Escalade EXT, Chevrolet Avalanche, Silverado 1500, and GMC Sierra 1500 vehicles originally sold, or ever registered, in the states of AK, CO, CT, ID, IA, ME, MA, MI, MN, MT, NH, NY, ND, OR, RI, SD, UT, VT, WA, WI, and WY or "Zone C." These vehicles are equipped with non-desiccated passenger frontal inflators containing phase-stabilized ammonium nitrate (PSAN) propellant. These inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, high temperatures, and high temperature cycling.

Consequence & remedy

Consequence: An inflator explosion may result in sharp metal fragments striking the driver or other occupants, resulting in serious injury or death.

Remedy: GM will notify owners, and dealers will replace the front passenger air bag inflator with an alternate one, free of charge. Interim letters notifying owners of the safety risk were mailed on February 25, 2021. Second notification letters will be mailed once the remedy is available. Owner notification letters were mailed to 40 VIN owners on May 11, 2021. A second owner notification letter was mailed to all other owners on January 24, 2022. Owners may contact Chevrolet customer service at 1-800-222-1020; Cadillac customer service at 1-800-458-8006; and GMC customer service at 1-800-462-8782. GM's number for this recall is N212328800.

18V267000 · Equipment

Apr 26, 2018

General Motors LLC (GM) is recalling certain 2009-2014 Chevrolet Silverado HD and GMC Sierra HD, 2009 GMC Topkick 5000, 6000, 7000 and 8000 Series and Isuzu F Series, and 2009-2018 Chevrolet Express, and GMC Savana vehicles, equipped with certain Plastic-Handle Fire Extinguishers or Push Button 'Pindicator' Fire Extinguishers. These extinguishers may become clogged, preventing the extinguisher from discharging as expected or requiring excessive force to activate the extinguisher. Additionally, in certain models, the nozzle may detach from the valve assembly with enough force that it could cause injury and also render the product inoperable. For a full list of the affected fire extinguisher models visit: https://static.nhtsa.gov/odi/rcl/2017/RMISC-17E062-5427.pdf

Consequence & remedy

Consequence: In the event of a fire, if the fire extinguisher does not function properly, it can increase the risk of injury.

Remedy: GM will notify owners, instructing them to contact Kidde to get a replacement fire extinguisher, free of charge. The recall began June 11, 2018. Owners may contact Chevrolet customer service at 1-800-222-1020, GMC customer service at 1-800-462-8782, and Isuzu customer service at 1-866-441-9638. GM's number for this recall is 18146.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

1

EA21002 · Desiccated Air Bag Inflator Rupture

Opened Sep 17, 2021 · No close date supplied

Status: open (inferred from source dates) · Air Bags:frontal:driver Side:inflator Module; Air Bags:frontal:passenger Side:inflator Module

From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.

Additional source detail variants (2)

Air Bags:frontal:driver Side:inflator Module

From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.

Air Bags:frontal:passenger Side:inflator Module

From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited. The rapid burning can cause the inflator to rupture during deployment, potentially causing serious or even fatal injury to vehicle occupants. See 2016 Blomquist Report at www.nhtsa.gov/sites/nhtsa.gov/files/documents/expert_report-hrblomquist.pdf.Consequently, all frontal inflators using propellant 2004 that do not contain a "desiccant" (a substance that traps and holds moisture) in US vehicles are under recall. These "non-desiccated" inflators either have been or are required to be replaced.In some cases, the remedy part for these recalled inflators was, or will be, an inflator using either propellant 2004 or 2004L that does contain a desiccant. None of these "desiccated" remedy parts (which were installed in older model year vehicles) are currently under recall for a degradation concern. Certain subsets of desiccated PSAN inflators using propellant 2004 for use as original equipment, however, have been recalled for a degradation concern. All Takata inflators produced with propellant 2004L contain desiccant, and none of these desiccated inflators using propellant 2004L are under recall for a degradation concern. There have been no reported field ruptures in any non-recalled desiccated PSAN inflators.It is understood that desiccants fully saturate at some threshold, at which point any additional moisture will not be captured. This means the degradation process observed in non-desiccated inflators using propellant 2004 may also occur in non-recalled desiccated inflators using propellant 2004, assuming additional moisture enters the inflator and high temperature cycling occurs. Based on available information, desiccant saturation can occur within the first five years in the worst environments, and the time required for full saturation is affected by multiple factors. While no present safety risk has been identified, further work is needed to evaluate the future risk of non-recalled desiccated inflators using propellant 2004.Three entities -- Takata (now known as TK Global), the Independent Testing Coalition, and Exponent -- have been studying the long-term behavior of Takata desiccated PSAN inflators using propellant 2004L (as well as 2004) in the presence of moisture and temperature cycling. The research efforts, which include development of predictive modeling techniques and field sample analysis, are ongoing. To date, none of the researchers have identified field evidence showing that propellant 2004L is undergoing a degradation process that leads to aggressive deployment and potential rupture. However, the time in service of such inflators remains short compared to that of the inflators using propellant 2004. Further study is needed to assess the long-term safety of desiccated inflators using propellant 2004L.The Office of Defects Investigation is opening this investigation to examine whether a safety defect related to propellant degradation exists in non-recalled desiccated PSAN frontal inflators manufactured by Takata. This investigation will require extensive information on Takata production processes and surveys of inflators in the field. Lists of recall actions that may have used desiccated PSAN inflators as remedy parts, as well as the makes and models originally manufactured with them, is available with the downloadable version of this document (see nhtsa.gov/recalls?nhtsaId=EA21002 -- note this information is subject to change/revision as the investigation proceeds). This investigation does not supersede EA15-001, which remains open.