2001 Chevrolet Trailblazer problems & reliability
20 owner complaints filed with NHTSA for the 2001 Chevrolet Trailblazer. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Engine and Engine Cooling | 5 | 25% |
| Power Train | 5 | 25% |
| Exterior Lighting | 3 | 15% |
| Service Brakes, Hydraulic | 3 | 15% |
| Structure | 3 | 15% |
| Air Bags | 2 | 10% |
| Electrical System | 2 | 10% |
| Equipment | 1 | 5% |
| Parking Brake | 1 | 5% |
| Service Brakes | 1 | 5% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Complaints by incident year
What owners report
“Driver door does not close. We've had it in a few times for repair as the driver's door hinges were loose. I was told by my mechanic of 13 years that he will not be able to repair it again. The last repair did not hold long, just about a week. Then I brought it to our local chevy dealer for repair as the door would…”
Structure · filed May 6, 2016
“2001 transmission problems had to be fixed. In 2016 transmission started acting up again, reverse went out and wouldn't shift properly in 1st, 2nd gear. Had to be rebuilt again.”
Power Train · filed Mar 15, 2016
“Tl* the contact owns 2001 chevrolet blazer. The contact stated that the actuator for the tailgate malfunctioned, preventing the tailgate from opening properly. The contact mentioned that due to the failure, the blinker and brake light bulbs were unable to be replaced when faulty. The vehicle was taken to the dealer…”
Structure · filed Oct 15, 2014
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Technical service bulletins
80 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2001 Chevrolet Trailblazer. The 10 most recent:
This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.
PIP5601C · Service Bulletin/Repair Instructions · issued Jul 18, 2025
Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to…
General Communication · Service Campaign · issued Aug 26, 2024
GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. This…
24-NA-141 · Service Bulletin/Repair Instructions · issued Jul 24, 2024
This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how…
16-NA-383 · Service Bulletin/Repair Instructions · issued Jun 28, 2024
This bulletin provides information for use on a Product Assistance Claim (PAC), which is formerly known as a Product Allegation Resolution (PAR) claim.
18-NA-099 · Service Bulletin/Repair Instructions · issued Jun 17, 2024
This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491, E4492, or E6961 and…
24-NA-098 · Service Bulletin/Repair Instructions · issued Jun 6, 2024
This bulletin advises the technician of possible location of an internal coolant leak from a specific cylinder head and location.
06-06-01-019C · Service Bulletin/Repair Instructions · issued Mar 14, 2024
This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains…
16-NA-383 · Service Bulletin/Repair Instructions · issued Mar 13, 2024
This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large amounts of debris has flowed throughout the…
22-NA-074 · Service Bulletin/Repair Instructions · issued Feb 22, 2024
This bulletin provides information for use on a Product Assistance Claim (PAC), which is formerly known as a Product Allegation Resolution (PAR) claim.
18-NA-099 · Service Bulletin/Repair Instructions · issued Jan 16, 2024
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
No NHTSA recall campaigns name the 2001 Chevrolet Trailblazer in our current data. Recalls may apply only to certain VIN ranges — always confirm with a VIN check.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 2001 Chevrolet Trailblazer?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.