2004 HUMMER H2 SPEEDOMETER QUIT FUNCTIONING COMPLETELY THE STARTED WORKING AGAIN BUT VERY ERRATICALLY, READING IMPROPER SPEEDS AT ALL SPEEDS INCLUDING REGISTERING 60 MPH WHILE AT A STOP. PROBLEM HAS BEEN OCCURRING SINCE 10/15/06. NOT A SAFE SITUATION. *NM
2004 Hummer H2
Owner reports · Recalls · Investigations
Limited comparison data
There is not enough comparable history to draw a useful model-year comparison.
About this comparison →How this year compares
Owner complaints by model year
Compare all H2 years →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
50 reports with mileage · 9 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.
- Electrical System. Review the 14 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Visibility. Review the 10 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes. Review the 8 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
59 reportsTHE POWER RETRACT MECHANISM IN BOTH OUTSIDE REAR VIEW MIRRORS HAVE FAILED MULTIPLE TIMES. AFTER FAILURE, THE MIRRORS CAN BE BLOWN INWARD AT HIGH SPEEDS CAUSING UNEXPECTED VIEWING PROBLEMS WHEN USED DURING OPERATION.. THE MIRRORS CAN ALSO EXHIBIT HIGH VIBRATIONS WHICH MAKE THEM DIFFICULT TO USE DURING OPERATION. IT IS FELT THAT T…
Read full complaint
THE POWER RETRACT MECHANISM IN BOTH OUTSIDE REAR VIEW MIRRORS HAVE FAILED MULTIPLE TIMES. AFTER FAILURE, THE MIRRORS CAN BE BLOWN INWARD AT HIGH SPEEDS CAUSING UNEXPECTED VIEWING PROBLEMS WHEN USED DURING OPERATION.. THE MIRRORS CAN ALSO EXHIBIT HIGH VIBRATIONS WHICH MAKE THEM DIFFICULT TO USE DURING OPERATION. IT IS FELT THAT THESE PROBLEMS COULD CONTRIBUTE TO AN ACCIDENT. *NM
THE 2 BRAIDED STEEL HOOD SUPPORT STRAPS EXHIBIT PREMATURE CORROSION WITHIN THE RUBBER COVERS CAUSING PREMATURE FAILURE WHICH MAY CAUSE AN INJURY DURING THE UNEXPECTED FAILURE WHEN THE HOOD IS OPENED BY USER. THE RUBBER COVERS HIDE THE CORROSION PROBLEM UNTIL FAILURE OCCURS. *NM
DT: 2004 GMC HUMMER THE CONSUMER STATES HE HAD TO MAKE AN EMERGENCY STOP AND THE BRAKES WENT ALMOST TO THE FLOOR. THE VEHICLE WAS TAKEN TO THE DEALERSHIP AND THEY COULD NOT FIND ANYTHING WRONG WITH IT. THE CONSUMER TRIED TO DUPLICATE THE PROBLEM HIMSELF AND IT DID THE SAME THING AGAIN. HE FEELS IT WILL NOT STOP IN TIME DURING…
Read full complaint
DT: 2004 GMC HUMMER THE CONSUMER STATES HE HAD TO MAKE AN EMERGENCY STOP AND THE BRAKES WENT ALMOST TO THE FLOOR. THE VEHICLE WAS TAKEN TO THE DEALERSHIP AND THEY COULD NOT FIND ANYTHING WRONG WITH IT. THE CONSUMER TRIED TO DUPLICATE THE PROBLEM HIMSELF AND IT DID THE SAME THING AGAIN. HE FEELS IT WILL NOT STOP IN TIME DURING AN EMERGENCY. THE MANUFACTURER TOLD THE CONSUMER TO TAKE THE VEHICLE TO THE DEALERSHIP. THIS ALMOST CAUSED AN ACCIDENT. THE BRAKES FAIL EVERY TIME THE CONSUMER NEEDS TO MAKE AN EMERGENCY STOP. *NM
DT: POWER STEERING LEAKS; NO WARNING NOTICE ( NO LIGHTS CAME ONE IN THE VEHICLE ON INDICATING THAT THE FLUID WAS LOW. THE PEOPLE WHO TOWED THE VEHICLE SAID IF SHE HAD LOST CONTROL SHE WOULD NOT HAD BEEN ABLE TO CONTROL THE VEHICLE BECAUSE THE PS WOULD HAVE GONE OUT ON THE VEHCILE. HAD IT IN 8 OR 9 TIMES FOR THE AIR CONDITIONIN…
Read full complaint
DT: POWER STEERING LEAKS; NO WARNING NOTICE ( NO LIGHTS CAME ONE IN THE VEHICLE ON INDICATING THAT THE FLUID WAS LOW. THE PEOPLE WHO TOWED THE VEHICLE SAID IF SHE HAD LOST CONTROL SHE WOULD NOT HAD BEEN ABLE TO CONTROL THE VEHICLE BECAUSE THE PS WOULD HAVE GONE OUT ON THE VEHCILE. HAD IT IN 8 OR 9 TIMES FOR THE AIR CONDITIONING NOT WORKING CORRECTLY. *AK
(2)SAFETY EQUIPMENT DEFECT...POWER FOLDING MIRRORS ON 2004 H2 HUMMER FAIL TO REPOSITION PROPERLY AND WILL NOT STAY IN PLACE RELIABLY. CONSEQUENCES FROM THIS DEFECT MAY LEAD TO ACCIDENTS OR INJURIES DUE TO UNEXPECTED CHANGE OF REAR VIEWING AREAS. (3)ARRANGEMENTS WERE MADE WITH SERVICE DEPARTMENT TO REPAIR WITHOUT CHARGE EVEN T…
Read full complaint
(2)SAFETY EQUIPMENT DEFECT...POWER FOLDING MIRRORS ON 2004 H2 HUMMER FAIL TO REPOSITION PROPERLY AND WILL NOT STAY IN PLACE RELIABLY. CONSEQUENCES FROM THIS DEFECT MAY LEAD TO ACCIDENTS OR INJURIES DUE TO UNEXPECTED CHANGE OF REAR VIEWING AREAS. (3)ARRANGEMENTS WERE MADE WITH SERVICE DEPARTMENT TO REPAIR WITHOUT CHARGE EVEN THOUGH MILEAGE HAS EXCEEDED WARRANTY LIMITS. UPON PRESENTING VEHICLE FOR REPAIR, I WAS INFORMED THAT I WOULD HAVE TO PAY FOR DIAGNOSTICS AND REPAIR. PRESUMING THAT THE USABLE LIFE SPAN OF THESE FOLDING MIRRORS SHOULD BE WELL IN EXCESS OF THE OCCASIONAL OPERATION THAT THEY HAD, I REFUSED TO PAY AND LEFT. THE SALESMAN WHO SOLD ME THIS HUMMER LATER SAID HE HAS NO CONTROL OF HOW THE SERVICE DEPARTMENT OPERATES AND THERE IS NOTHING HE CAN DO ABOUT IT. ALSO, I WAS TOLD PREVIOUS TO MAKING MY APPOINTMENT FOR REPAIR THAT THIS IS A PROBLEM WITH MANY OF THE POWER FOLDING MIRRORS ON H2 HUMMERS. NOTHING HAS BEEN DONE TO CORRECT THIS FAILURE OF SAFETY EQUIPMENT (REAR VIEW MIRRORS). LEFT REAR DOOR FAILS TO LATCH DUE TO BINDING MECHANISM. THIS WAS ALSO REPORTED AND NOT REPAIRED DUE TO SAME CIRCUMSTANCES.*AK
WHILE DRIVING 10 MPH VEHICLE STALLED WITHOUT WARNING. DRIVER TRIED TO RESTART THE VEHICLE AND WAS ABLE TO DO SO. VEHICLE WAS TAKEN TO THE DEALER FOR INSPECTION, AND MECHANIC DETERMINED THAT THE IGNITION SWITCH NEEDED TO BE REPLACED, AND REPLACED IT. *AK
WHILE DRIVING 35 MPH THE STEERING KNUCKLE FRACTURED WITHOUT WARNING. AS A RESULT THE FRONT DRIVER SIDE WHEEL SEPARATED FROM THE VEHICLE. THE VEHICLE HAD TO BE TOWED TO THE NEAREST DEALER. PLEASE PROVIDE ADDITIONAL INFORMATION. *JB
FRONT WHEEL LINKAGE FAILURE, WHEEL FELL OFF. MY BROTHER AND I NEARLY DIED TODAY FROM AN ACCIDENT IN MY MOTHERS H2. WE HAD JUST LEFT A FRIENDS HOUSE AND WERE TRAVELING AT ABOUT 35 MPH WHEN ALL OF A SUDDEN IT SEEMED THAT THE FRONT DRIVER SIDE WHEEL BROKE FREE. THE H2 VIOLENTLY SWERVED TO THE LEFT AND EVEN THOUGH I AM A BIG GUY IT…
Read full complaint
FRONT WHEEL LINKAGE FAILURE, WHEEL FELL OFF. MY BROTHER AND I NEARLY DIED TODAY FROM AN ACCIDENT IN MY MOTHERS H2. WE HAD JUST LEFT A FRIENDS HOUSE AND WERE TRAVELING AT ABOUT 35 MPH WHEN ALL OF A SUDDEN IT SEEMED THAT THE FRONT DRIVER SIDE WHEEL BROKE FREE. THE H2 VIOLENTLY SWERVED TO THE LEFT AND EVEN THOUGH I AM A BIG GUY IT WAS ALMOST IMPOSSIBLE TO KEEP THAT 6000 LBS BEAST FROM SWERVING. I HIT THE BRAKES BUT THOSE DIDN'T SEEM TO HELP SINCE THE BRAKES WERE STILL ATTACHED TO THE WHEEL WHICH I COULD SEE WAS BEHIND US FROM THE SIDE VIEW MIRROR. THE H2 TORE THROUGH THE OPPOSITE LANE AND SLAMMED US INTO A DITCH CAUSING EXTENSIVE DAMAGE TO THE DRIVERS SIDE. I CAN ONLY THANK GOD THAT WE WERE FINE AND THAT THERE WAS NO ONCOMING TRAFFIC AT THAT TIME. THE BRAKING OFF OF THE WHEEL CAUSED MAJOR WHEEL WELL AND FENDER DAMAGE. THE FORCE OF THE WHEEL SLAMMING INTO THE WELL SHATTERED THE WINDSHIELD AND BROKE THE SIDE STEP. I HAD DIFFICULTY OPENING THE DOOR TO GET OUT BECAUSE OF THE DAMAGE. WHEN I GOT OUT I SAW THAT THE WHEEL WAS ABOUT 10 FEET BEHIND US. THERE WERE SEVERAL SUSPENSION PIECES STILL CONNECTED TO IT. THE POLICE OFFICER HAD A HARD TIME BELIEVING MY STORY, BUT THAT IS EXPECTED FROM THEM, THE REAL PAINFUL THING IS THAT MY MOTHER WONT BELIEVE ME EITHER. I HAVE READ OF SEVERAL CASES LIKE THIS. THIS WAS A VERY SCARY ACCIDENT, NOTHING IS WORSE THAN LOOSING ALL CONTROL OF A VEHICLE WITH A LOVED ONE INSIDE, KNOWING THAT YOU ARE RESPONSIBLE FOR THAT PERSON. *AK
Official recalls
305V163000 · Seat Belts:rear/other
Apr 22, 2005
ON CERTAIN CREW CAB PICKUP TRUCKS AND SPORT UTILITY VEHICLES, THE 2ND ROW CENTER OCCUPANT SEAT BELT ROUTING MAY MAKE IT DIFFICULT TO POSITION THE LAP PORTION OF THE SAFETY BELT LOW AROUND THE HIPS OF OCCUPANTS, ESPECIALLY SMALLER OCCUPANTS, SEATED IN THIS POSITION. APPROPRIATE USE OF A CHILD SEAT OR BOOSTER SEAT, AS RECOMMENDED FOR SMALL CHILDREN, DOES IMPROVE THE FIT CONDITION FOR THIS USER GROUP. IN ADDITION TO INSTRUCTIONS ON PROPER INFANT AND YOUNG CHILD RESTRAINT (WITH CHILD SEATS OR BOOSTERS), SPECIAL VERBIAGE FOR RESTRAINING OLDER CHILD IS INCLUDED IN THE OWNER'S MANUAL. ALSO, THE SUGGESTED SEAT BELT FIT/ROUTING FOR ADULTS, IRRESPECTIVE OF SEATING POSITION, IS DESCRIBED IN THE OWNER'S MANUAL TEXT.
Consequence & remedy
Consequence: A LAP PORTION OF THE SEAT BELT ROUTING THAT IS NOT LOW AND SNUG ON THE HIPS CAN ALLOW THE LAP BELT TO RIDE UP ON AN OCCUPANT'S ABDOMEN INSTEAD OF FITTING LOW AROUND THEIR HIPBONES, AND THEREFORE, CAN EXPOSE THEM TO MORE RISK OF ABDOMINAL AND INTERNAL ORGAN INJURY.
Remedy: DEALERS WILL CUT OPEN THE GUIDE LOOP, REMOVE A PORTION OF THE LOOP, AND THEN THE REMAINING TWO SIDES SHOULD BE FOLDED OVER AND SECURED WITH A RETAINER FREE OF CHARGE. THE RECALL BEGAN ON JULY 21, 2005. OWNERS MAY CONTACT CADILLAC AT 1-866-982-2339, CHEVROLET AT 1-800-630-2438, GMC AT 1-866-996-9463, OR HUMMER AT 1-800-732-5493.
05V043000 · Service Brakes, Hydraulic
Feb 8, 2005
CERTAIN TRUCKS, SPORT UTILITY VEHICLES, AND VANS EQUIPPED WITH BOSCH HYDRO-BOOST BRAKE ASSEMBLIES, THE HYDRAULIC BRAKE BOOSTER PRESSURE ACCUMULATOR MAY CRACK AND SEPARATE FROM THE HYDRO-BOOST ASSEMBLY DURING NORMAL OPERATING CONDITIONS.
Consequence & remedy
Consequence: IF A SEPARATION OCCURRED AND THE HOOD OF THE VEHICLE WERE OPEN, FRAGMENTS FROM THE ACCUMULATOR COULD CAUSE INJURY TO PEOPLE IN THE IMMEDIATE AREA. THE PRESENCE OF THIS CRACK OR FRACTURED SURFACE COULD ALLOW THE HYDRAULIC FLUID TO LEAK FROM THE ACCUMULATOR CIRCUIT OF THE BOOSTER ASSEMBLY. THE LOSS OF FLUID WOULD CAUSE INCREASED STEERING AND BRAKING EFFORT AND A CRASH MAY OCCUR WITHOUT PRIOR WARNING.
Remedy: DEALERS WILL TEST THE HYDRO-BOOST ASSEMBLY FOR FUNCTIONAL OPERATION OF THE TWO-FUNCTION VALVE. IF THE HYDRO-BOOST ASSEMBLY FAILS THE TEST, DEALERS WILL REPLACE THE ASSEMBLY FREE OF CHARGE. THE RECALL BEGAN ON MARCH 23, 2005. OWNERS MAY CONTACT CHEVROLET AT 1-800-630-2438, GMC TRUCKS AT 1-866-996-9463 AND HUMMER AT 1-800-732-5493.
04V045000 · Service Brakes, Hydraulic
Feb 4, 2004
CERTAIN SPORT UTILITY VEHICLES, PICKUP TRUCKS, AND PASSENGER VANS FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 135, ?PASSENGER CAR BRAKE SYSTEMS.? SOME OF THESE VEHICLES WERE PRODUCED WITH AN OUT-OF-SPECIFICATION BRAKE HYDRO-BOOST HOUSING RELIEF VALVE BORE.
Consequence & remedy
Consequence: CONSEQUENTLY, THE VALVE O-RING SEAL MAY FRACTURE. STEERING EFFORTS MAY BE SLIGHTLY INCREASED WHILE BRAKING OR PARKING. UNDER CERTAIN DRIVING CONDITIONS, A FRACTURED SEAL MAY REQUIRE A SLIGHT INCREASE IN THE APPLIED BRAKE PEDAL EFFORT TO ACHIEVE THE SAME VEHICLE DECELERATION RATE AS PRIOR TO THE SEAT FRACTURE.
Remedy: DEALERS ARE TO REPLACE THE HYDRO-BOOST RELIEF VALVE. THE RECALL BEGAN ON JUNE 18, 2004. OWNERS SHOULD CONTACT CADILLAC AT 1-866-982-2339; CHEVROLET AT 1-800-630-2438; GMC AT 1-866-996-9463; OR HUMMER AT 1-866-486-6376.
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
2EA05017 · Hummer H2 Steering Knuckle Failures
Opened Oct 28, 2005 · Closed Apr 30, 2007
Status: closed (inferred from source dates) · Suspension:front:control Arm:lower Ball Joint
ODI UPGRADED THIS INVESTIGATION AT THE CONCLUSION OF PE04-080.THE ALLEGED DEFECT INVOLVES THE FAILURE OF THE STEERING KNUCKLE AT THE LOWER BALL JOINT BOSS, RESULTING IN A SEPARATION OF THE LOWER BALL JOINT FROM THE KNUCKLE.A LOWER BALL JOINT SEPARATION COULD RESULT IN A LOSS OF STEERING AND/OR A DISABLED VEHICLE. IT APPEARS THAT THE FRACTURES OF H2 STEERING KNUCKLES CAN BE ATTRIBUTED TO WHEEL/TIRE COLLISION FORCES BEING TRANSFERRED DIRECTLY TO THE STEERING KNUCKLE.THE ORIGINAL KNUCKLE DESIGN APPEARS TO BE SUFFICIENT FOR THE H2 APPLICATION.EVIDENCE FROM INSPECTED VEHICLES, PHOTOGRAPHS, POLICE REPORTS AND EDR DATA INDICATES COLLISION IMPACT EVENTS PLACED STRESS ON THE STEERING KNUCKLE CAUSING IT TO FRACTURE.FURTHER USE OF AGENCY RESOURCES DOES NOT APPEAR TO BE WARRANTED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT NO SAFETY-RELATED DEFECT EXISTS WITH REGARD TO THE SUBJECT COMPONENT.THE AGENCY RESERVES THE RIGHT TO TAKE FURTHER ACTION ON THIS ISSUE IF WARRANTED.
PE04080 · Steering Knuckle Fracture
Opened Dec 2, 2004 · Closed Oct 28, 2005
Status: closed (inferred from source dates) · Steering:linkages:tie Rod Assembly; Suspension:front; Suspension:front:control Arm:lower Ball Joint
DURING THE PE, ODI INVESTIGATED THE HUMMER H2 FOR FRACTURES WHICH WERE OCCURRING AT THE FRONT STEERING KNUCKLE LOWER BOSS.WHEN THE KNUCKLE LOWER BOSS FRACTURES, THE LOWER BALL JOINT STUD IS RELEASED AND THE ENTIRE KNUCKLE AND WHEEL/TIRE ASSEMBLY SEPARATES FROM THE VEHICLE.ODI IS UPGRADING THIS INVESTIGATION TO GAIN A FULL TECHNICAL UNDERSTANDING OF THE FACTORS WHICH CONTRIBUTED TO THESE FAILURES.
Additional source detail variants (3)
Steering:linkages:tie Rod Assembly
DURING THE PE, ODI INVESTIGATED THE HUMMER H2 FOR FRACTURES WHICH WERE OCCURRING AT THE FRONT STEERING KNUCKLE LOWER BOSS.WHEN THE KNUCKLE LOWER BOSS FRACTURES, THE LOWER BALL JOINT STUD IS RELEASED AND THE ENTIRE KNUCKLE AND WHEEL/TIRE ASSEMBLY SEPARATES FROM THE VEHICLE.ODI IS UPGRADING THIS INVESTIGATION TO GAIN A FULL TECHNICAL UNDERSTANDING OF THE FACTORS WHICH CONTRIBUTED TO THESE FAILURES.
Suspension:front:control Arm:lower Ball Joint
DURING THE PE, ODI INVESTIGATED THE HUMMER H2 FOR FRACTURES WHICH WERE OCCURRING AT THE FRONT STEERING KNUCKLE LOWER BOSS.WHEN THE KNUCKLE LOWER BOSS FRACTURES, THE LOWER BALL JOINT STUD IS RELEASED AND THE ENTIRE KNUCKLE AND WHEEL/TIRE ASSEMBLY SEPARATES FROM THE VEHICLE.ODI IS UPGRADING THIS INVESTIGATION TO GAIN A FULL TECHNICAL UNDERSTANDING OF THE FACTORS WHICH CONTRIBUTED TO THESE FAILURES.
Suspension:front
DURING THE PE, ODI INVESTIGATED THE HUMMER H2 FOR FRACTURES WHICH WERE OCCURRING AT THE FRONT STEERING KNUCKLE LOWER BOSS.WHEN THE KNUCKLE LOWER BOSS FRACTURES, THE LOWER BALL JOINT STUD IS RELEASED AND THE ENTIRE KNUCKLE AND WHEEL/TIRE ASSEMBLY SEPARATES FROM THE VEHICLE.ODI IS UPGRADING THIS INVESTIGATION TO GAIN A FULL TECHNICAL UNDERSTANDING OF THE FACTORS WHICH CONTRIBUTED TO THESE FAILURES.
Illustration