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2013 Chevrolet Silverado 1500

Owner reports · Recalls · Investigations

Similar to other model years

Owner complaints for the 2013 Chevrolet Silverado 1500 do not stand out strongly from the model-year median of 525.

About this comparison →

When problems were reported

Mileage at the reported incident

170 reports with mileage · 131 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 83 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Structure. Review the 75 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine. Review the 33 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

8 crash reports0 fire reports4 injury reports

What owners actually said

301 reports
1 miles · Oct 27, 2020
Engine

MY 2013 HAS DEVELOPED THE NOTORIOUS LIFTER TICK FROM A COLLAPSED LIFTER (THIS AFFECTS MANY 5.3L V8 ENGINES OF THIS ERA). THIS WILL LEAD TO EXCESSIVE OIL BURNING, AND CLOGGED EXHAUST SYSTEMS OVER TIME DUE TO THE OIL BURNING. THIS ALSO DAMAGES/DESTROYS THE CAM SHAFT OVER TIME AND REQUIRES FREQUENT SPARK PLUG CHANGES. I SUSPECT …

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MY 2013 HAS DEVELOPED THE NOTORIOUS LIFTER TICK FROM A COLLAPSED LIFTER (THIS AFFECTS MANY 5.3L V8 ENGINES OF THIS ERA). THIS WILL LEAD TO EXCESSIVE OIL BURNING, AND CLOGGED EXHAUST SYSTEMS OVER TIME DUE TO THE OIL BURNING. THIS ALSO DAMAGES/DESTROYS THE CAM SHAFT OVER TIME AND REQUIRES FREQUENT SPARK PLUG CHANGES. I SUSPECT THIS PROBLEM STARTED AS EARLY AS 60,000 MILES (WHILE STILL UNDER WARRANTY) HOWEVER BECAUSE THE TRUCK WASN'T CONSUMING 1 QT / 1000 MILES GM REFUSED TO LOOK INTO THE ISSUE FURTHER. THIS IS A WELL-DOCUMENTED ISSUE ON THESE VEHICLES OVER TIME, THIS CAN LEAD TO STALLS OR BREAKDOWNS WHICH CAN BE A HAZARD. IT ALSO SERVERELY DIMINISHES THE RESALE VALUE OF THE VEHICLE AS THE REQUIRED REPAIRS ARE QUITE EXPENSIVE (ABOUT $2000 - $3500).

NHTSA ODI #11366651

36,000 miles · Sep 15, 2020
Air Bags

THE DASH CRACKED AROUND AIRBAG, COULD CAUSE PUNCTURE TO BAG WHEN DEPLOYED, CAUSING HARM. VEHICLE WAS IN MOTION. MILEAGE ON VEHICLE IS ONLY 36,000 MILES.

NHTSA ODI #11355153

81,000 miles · Aug 30, 2020
Structure

THE DRIVER DOOR HANDLE (BOTH THE INTERIOR OR EXTERIOR HANDLES) WOULD NOT OPEN THE DOOR WHEN STOPPED. THE REPAIR SHOP SHOWED ME A SMALL POT METAL ARM THAT BROKE INSIDE THE DOOR PANEL AND CAUSED THE PROBLEM. WHILE NOT AN ISSUE BY ITSELF, IF THE AUTO WAS IN AN ACCIDENT, THIS WOULD NOT HAVE ALLOWED THE DRIVER TO EXIT THE VEHICLE, DE…

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THE DRIVER DOOR HANDLE (BOTH THE INTERIOR OR EXTERIOR HANDLES) WOULD NOT OPEN THE DOOR WHEN STOPPED. THE REPAIR SHOP SHOWED ME A SMALL POT METAL ARM THAT BROKE INSIDE THE DOOR PANEL AND CAUSED THE PROBLEM. WHILE NOT AN ISSUE BY ITSELF, IF THE AUTO WAS IN AN ACCIDENT, THIS WOULD NOT HAVE ALLOWED THE DRIVER TO EXIT THE VEHICLE, DEPENDING ON THE FINAL RESTING POSITION. FURTHER ADDING TO THIS IS THAT THE ISSUE APPEARED FOR A DAY, THEN THE DOOR WORKED FINE FOR 2 MORE DAYS BEFORE BECOMING PERMANENTLY NON-FUNCTIONING.

NHTSA ODI #11352133

4,967 miles · Aug 28, 2020
Structure

I NOTICED EXCESSIVE FRAME RUST. CONTACTED MY LOCAL DEALER AND THEY TOOK THE TRUCK IN FOR PROPER FIX. RUST WAS SUPPOSEDLY GROUND OFF AND FRAME AND UNDERCARRIAGE WERE UNDERCOATED. APPARENTLY THE FACTORY WAX COATING WAS NOT PROPERLY CLEANED BEFORE PAINT. I RECENTLY NOTICED THE RUST IS BACK ON THE FRAME AND FRONT STEERING PARTS. THI…

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I NOTICED EXCESSIVE FRAME RUST. CONTACTED MY LOCAL DEALER AND THEY TOOK THE TRUCK IN FOR PROPER FIX. RUST WAS SUPPOSEDLY GROUND OFF AND FRAME AND UNDERCARRIAGE WERE UNDERCOATED. APPARENTLY THE FACTORY WAX COATING WAS NOT PROPERLY CLEANED BEFORE PAINT. I RECENTLY NOTICED THE RUST IS BACK ON THE FRAME AND FRONT STEERING PARTS. THIS TRUCK HAS ONLY 16,000 MILES, IS GARAGE KEPT AND HAS RARELY BEEN DRIVEN IN WINTER MONTHS.

NHTSA ODI #11351906

111,300 miles · Aug 17, 2020
Structure

TL* THE CONTACT OWNS A 2013 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE INSPECTING THE VEHICLE, HE NOTICED THE SUBFRAME WAS COMPLETED RUSTED. THE CONTACT CALLED LOCAL DEALER CMA'S COLONIAL CHEVROLET LOCATED AT 12420 JEFFERSON DAVIS HWY, CHESTER, VA 23831, (804) 748-6461, WHERE IT WAS DIAGNOSED WITH NEEDING THE UNDERC…

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TL* THE CONTACT OWNS A 2013 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE INSPECTING THE VEHICLE, HE NOTICED THE SUBFRAME WAS COMPLETED RUSTED. THE CONTACT CALLED LOCAL DEALER CMA'S COLONIAL CHEVROLET LOCATED AT 12420 JEFFERSON DAVIS HWY, CHESTER, VA 23831, (804) 748-6461, WHERE IT WAS DIAGNOSED WITH NEEDING THE UNDERCARRIAGE SUBFRAME TO BE REPLACED. THE VEHICLE HAD NOT BEEN REPAIRED AS OF YET. THE MANUFACTURER HAD NOT BEEN INFORMED OF FAILURE. THE FAILURE MILEAGE WAS 111,300.

NHTSA ODI #11349826

78,000 miles · Aug 16, 2020
Unknown Or Other

THE PASSENGER SIDE DASHBOARD IS CRACKING ABOVE THE AIRBAG.

NHTSA ODI #11349719

65,000 miles · Aug 2, 2020
Air BagsService BrakesStructureCrash

TRUCK WAS HIT ON FRONT DRIVER SIDE BY ANOTHER VEHICLE. THE FRAME WAS BENT AND THE LEFT SIDE WAS ALSO DAMAGED. AIRBAGS WERE RELEASED. FRONT TIRES WERE DAMAGED. THIS OCCURRED ON JULY 9, 2020. INSURANCE AND REPAIR COMPANY ARE TRYING TO FIX IT WITH OTHER PARTS. I WAS IN MOTION ON A SIDE STREET AND A SPEEDING VEHICLE THAT I DID NOT …

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TRUCK WAS HIT ON FRONT DRIVER SIDE BY ANOTHER VEHICLE. THE FRAME WAS BENT AND THE LEFT SIDE WAS ALSO DAMAGED. AIRBAGS WERE RELEASED. FRONT TIRES WERE DAMAGED. THIS OCCURRED ON JULY 9, 2020. INSURANCE AND REPAIR COMPANY ARE TRYING TO FIX IT WITH OTHER PARTS. I WAS IN MOTION ON A SIDE STREET AND A SPEEDING VEHICLE THAT I DID NOT SEE HIT ME.*DT*JB

NHTSA ODI #11342790

90,000 miles · Jul 26, 2020
Air BagsCrashInjury

ROLLED TRUCK, ONLY AIRBAG THAT WENT OFF WAS PASSENGER DOOR.

NHTSA ODI #11341521

34,000 miles · Jul 14, 2020
Unknown Or Other

WHILE IN CALIFORNIA (FROM TEXAS) AND A/C STOPS BLOWING COLD OR WARN, JUST HOT AIR. TRIED ADDING SEALANT AND FREON THAT WORKED FOR ABOUT 10 MINUTES. SINCE THEN JUST HOT AIR. DRIVING BACK FROM CA TO TX THRU THE CENTRAL VALLEY, AZ AND NM WAS NOT FUN WITH TEMPS > 90. I WAS CHECKING HERE TO SEE IF ANYONE HAS HAD SUCCESS ON GETTING GM…

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WHILE IN CALIFORNIA (FROM TEXAS) AND A/C STOPS BLOWING COLD OR WARN, JUST HOT AIR. TRIED ADDING SEALANT AND FREON THAT WORKED FOR ABOUT 10 MINUTES. SINCE THEN JUST HOT AIR. DRIVING BACK FROM CA TO TX THRU THE CENTRAL VALLEY, AZ AND NM WAS NOT FUN WITH TEMPS > 90. I WAS CHECKING HERE TO SEE IF ANYONE HAS HAD SUCCESS ON GETTING GM TO FIX THIS PROBLEM THAT SEEMS RAMPANT WITH THIS MODEL SILVERADO/SIERRA. UPDATE FROM JUL 14, 2020 I WROTE TO GM AND RECEIVED ONE PHONE CALL WITH A NUMBER TO CALL. CALLED THE NUMBER OVER 10 TIMES, EVERY TIME I WAS DISCONNECTED WHILE GOING THROUGH THE MENU. RECEIVED A LETTER FROM CHEVROLET WITH THE SAME USELESS PHONE NUMBER. WROTE AGAIN HOPING TO GET EMAIL ADDRESS TO OPEN A DIALOG.

NHTSA ODI #11339249

21,000 miles · Jul 13, 2020
StructureUnknown Or Other

CRACK DASH THE TRUCK IS GARAGE SENSE I BROUGHT IT NEW IT HAS ONLY 21000 MILES IT NEVER BEEN OUTSIDE AS FAR JUST SETTING THE CRACK SEEMS TO BE GETTING BIGGER . THE TRUCK AS NEVER BEEN ANY ACCIDENTS .

NHTSA ODI #11339081

Official recalls

2

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.

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

2

DP22005 · Pedestrian Alert Sounds

Opened Jan 27, 2023 · Closed Aug 7, 2023

Status: closed (inferred from source dates) · Electrical System:propulsion System

NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles. The standard applies to hybrid and electric vehicles that have a gross vehicle weight rating of 4,536 KG or less or are defined as low-speed vehicles. The standard became fully applicable to all such vehicles manufactured on or after March 1, 2021.On January 27, 2023, NHTSA opened Defect Petition (DP) 22-005 to evaluate the subject matter described in the petition. On June 24, 2023 and as supplemented on June 25, 2023, the petitioner notified NHTSA he was withdrawing his petition. The petitioner indicated that, based on his review of data, there is no justification for asserting potential benefits that could be derived from actions sought by my petition. Based on the petitioner's withdrawal, DP22-005 is closed. Closure of this DP does not represent a determination by NHTSA regarding the subject matter of the petition.

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.