There are 3 stored owner reports matching the powertrain & transmission leading-label group for the 2004 Chevrolet Blazer in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 3 of 3 matching reports.
Open the full vehicle complaint log (all categories)GOT INTO THE VEHICLE IN THE MORNING AND WHEN I PLACED IT INTO REVERSE I HEARD A LOUD SHATTERING NOISE AND THE CAR WOULD NOT BACK UP. I HAD IT TOWED TO THE TRANSMISSION SHOP AND THEY REPORTED THAT THE "SUN" GEAR HAD SHATTERED WITH A REPAIR COST OF 2300.00. THEY ALSO TOLD ME THAT THIS IS A VERY COMMON PROBLEM WITH GM TRANSMISSIONS DUE TO A WEAK GEAR FROM THE MANUFACTURER. AFTER RESEARCHING IT ON LINE I AM FINDING MANY OTHER PEOPLE WITH THE SAME PROBLEM. THE GM CUSTOMER REP WAS VERY SHORT AND STATED THAT THE CAR WAS OUT OF WARRANTY AND I HAVE NO CLAIM. IF THIS WAS A KNOWN ONGOING PROBLEM GM COULD HAVE RECALLED THESE VEHICLES AND SAVED A LOT OF GRIEF FOR THEIR CUSTOMERS. I FEEL THAT I SHOULD BE REIMBURSED SOME OF THE EXPENSE OF THIS KNOWN DEFECT. *TR
TL*THE CONTACT OWNS A 2004 CHEVROLET BLAZER. WHEN THE GEAR WAS SHIFTED INTO REVERSE, THE VEHICLE WOULD NOT MOVE. THE DEALER STATED THAT THE FAILURE WAS CAUSED BY A FAULTY SUN GEAR. THE TRANSMISSION NEEDED TO BE REPLACED IN ORDER TO REPAIR THE FAILURE. NO REPAIRS WERE MADE. THE CURRENT AND FAILURE MILEAGES WERE 112,000.
IN A 2004 CHEVY BLAZER, 20000 MILES. 4 WHEEL DRIVE FRONT DIFFERENTIAL ACTUATOR FAILED TO ENGAGE. UPON INSPECTION IT WAS DETERMINED THAT THE ACTUATOR HAD CORRODED TO THE POINT THAT IT NEED TO BE REPLACED. THE FIRST REPLACEMENT PART ALSO FAILED SHORTLY AFTER BEING CONNECTED AND A THIRD PART NEEDED TO BE ORDERED. ALL REPLACEMENTS WERE CONDUCTED BY MANUFACTURER.*AK
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 22, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.