Problems · by component

2006 Chevrolet Trailblazer Ext engine problems

47 owner complaints to NHTSA about the 2006 Chevrolet Trailblazer Ext cite engine, 4% of all 1,313 complaints for this model year.

Complaints
47
4% of all complaints
Crashes
0
Reported by owners
Fires
5
Reported by owners
Injuries
0
Reported by owners
01 —Owner reports

What owners say about the engine

Verbatim from NHTSA complaints, newest first
“Driving vehicle turn it off turn back on drive somewhere and turn it off and go swimming for an hour came back go to go start it and would not start I believe it's the anti-theft system as we replaced the ignition switch and the ignition cylinder but my illumination selector for my gear selector nor my tachometer works nor do my front two windows or locks”
Owner complaint to NHTSAFiled May 19, 2022Electrical system, Engine, Fuel/propulsion systemODI 11465236
“The contact owns a 2006 Chevrolet Trailblazer. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. The contact replaced the camshaft and crankshaft sensors; however, the failure recurred with an error code for the Variable Valve Timing (VVT). Additionally, the odometer mileage would not appear upon starting the vehicle until the vehicle was driven. The vehicle was taken to the dealer where it was diagnosed that the timing chain and actuator needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 135,000.”
Owner complaint to NHTSAFiled Apr 19, 2022EngineODI 11461358
“STABILITRAK LIGHT COMES ON INTERMITTENTLY FOR NO APPARENT REASON. HAVE HAD BRAKE FLUID, BRAKE PADS, ROTORS, SENSORS AND TIRES REPLACED. TRACTION CONTROL AND ABS CHECKED; ALL IS GOOD. NO CEL CODE RELATING TO THIS ISSUE. TRACTION CONTROL OFF BUTTON DOESN?T WORK ONCE LIGHT APPEARS. THERE IS NO DIFFERENCE IN DRIVING WHEN LIGHT IS ON. STILL HAVEN?T FIGURED OUT WHAT CAUSES IT. BATTERY, POWER CORDS, AND ALTERNATOR HAVE BOTH HAD TO BE REPLACED DO TO ISSUES WITH THE VOLTAGE OUTPUTS. NOW TO REPLACE FUSE BOX AND ECM DUE TO MORE VOLTAGE OUTPUT ISSUES. CEL HAS HAD NO INDICATIONS OF AN ECM, FUSE BOX, ALTERNATOR, OR BATTERY PROBLEM UNTIL THEY WERE BEYOND REPAIR (THIS ALSO HAPPENED WITH OTHER TRANSFER CASE LEAK, LOSS OF REVERSE GEAR, AND FRONT DIFFERENTIAL LEAK) . CEL COMES AND GOES BY ITSELF AT ANYTIME WITH NO DIFFERENCE IN DRIVABILITY OR CONDITIONS. EACH TIME IT REAPPEARED IT?S THROWN DIFFERENT SENSORS AND/OR CIRCUITS FAILING OR HIGH/LOW VOLTAGES INCLUDING O2, MAF, TPS, EVAP SYSTEM, WHEEL SPEED, FUEL PRESSURE, OIL PRESSURE, STEERING WHEEL, GAS AND BRAKE PEDAL POSITION, AIR BAG IMPACT, JUST TO NAME A FEW. MY CAR HAS RECENTLY STARTED GOING INTO LIMP MODE AT RANDOM DUE TO THIS…”
Owner complaint to NHTSAFiled Jun 1, 2020Electrical system, Electronic stability control (esc), EngineODI 11326724
“I PURCHASED THE VEHICLE FROM USADOS AUTO SALES AND THE OWNER TOLD ME THE CAR HAD 185,000 ON IT. WELL AFTER PAYING CASH AND WAITING 27 DAYS I FINALLY RECEIVE THE TITLE AND IT SAYS IT HAS 260,000. THE BILL OF SALE HE SIGNED WHEN HE BOUGHT IT ALSO STATED THAT THE ACTUAL MILEAGE WASN'T CORRECT. HE FILED MY BILL OF SALE OUT AND DIDN'T INFORM ME OR EVEN RIGHT BACK THERE FORM HE LIED TO ME AND SAID IT WAS 185,000 SO I CONTACTED HIM AND HE SAID IT WAS SOMETHING HE OVERLOOKED TO JUST WRITE ON MY BILL OF SALE THE ACTUAL MILEAGE AND I TOLD HIM NO I WOULD YOU HAVE SPENT $2500 ON A VEHICLE WITH 260,000 MILES AND HE REFUSES TO HELP ME. NOW THE VEHICLES CHECK ENGINE LIGHT IS ON. IT LEAKING OIL AND THE RADIO DOESN'T WORK AND IT KEEPS BLOWING FUSES.”
Owner complaint to NHTSAFiled Apr 5, 2020Power train, Unknown or other, EngineODI 11320269
“ON AUGUST 18, 2017, I LEASED-TO-OWN A 2006 CHEVROLET TRAILBLAZER FROM ACTION AUTO OF TUPELO, MS. AROUND THE FIRST WEEK OF OCTOBER OF 2018, I HAD LEND SAID VEHICLE TO MY SISTER. SHE CONTACTED ME SAYING THAT THE ENGINE WAS MAKING A KNOCKING NOISE, AND BROUGHT THE VEHICLE BACK TO ME, WHERE I INSPECTED IT WHILE IT WAS STATIONARY. TO RULE OUT EVERYTHING ELSE BEFORE I ACKNOWLEDGED THE SOUND OF THE KNOCK BEING A SEVERE MECHANICAL FAILURE OF THE ENGINE, I CONNECTED A DIAGNOSTIC SCANNER TO THE CAN DATA CONNECTOR ON THE 2006 CHEVROLET TRAILBLAZER. IN SECONDS THE SCREEN ON THE SCANNER WAS FLOODED WITH FAULTS, BUT THEN THE SCANNER STARTED BEEPING, SAYING THAT THE SRS (SUPPLEMENTAL RESTRAINT SYSTEM) HAD BEEN ACTIVATED. LOOKING AROUND THE VEHICLE I DIDN'T SEE ANY SIGN OF ANY AIRBAG BEING DEPLOYED, OR ANY SEATBELT MISSING. IT WASN'T UNTIL I CHECKED THE CONNECTORS COMING OUT OF THE AIRBAG MODULE THAT I SAW FOR THE FIRST TIME THAT THE AIRBAGS WERE MISSING. I INFORMED MY INSURANCE PROVIDER REGARDING THE ISSUE, WHICH THEY ASSUMED THAT THE VEHICLE WAS IN A CURRENT ACCIDENT. IN WHICH IT WAS NOT. AFTER FURTHER EXPLANATION, THEY CANCELLED THE INSURANCE AS AIRBAG DEPLOYMENT ARE ONE OF…”
Owner complaint to NHTSAFiled Jun 11, 2019Air bags, EngineODI 11219238
“TL* THE CONTACT OWNS A 2006 CHEVROLET TRAILBLAZER. WHILE DRIVING VARIOUS SPEEDS, THE WINDSHIELD WIPERS SPRAYED UNCONTROLLABLY AT MAXIMUM PRESSURE. EVEN THOUGH THE SPRAYER ACTIVATED UNCONTROLLABLY, THE WIPERS DID NOT WORK. THE FAILURE RECURRED. THE CONTACT ALSO STATED THAT THE CHECK ENGINE INDICATOR ILLUMINATED AND REMAINED LIT PRIOR TO THE FAILURE. THE CONTACT CALLED PROGRESSIVE CHEVROLET AT 330-879-3697 (LOCATED AT 8000 HILLS AND DALES RD NW, MASSILLON, OH 44646) AND WAS ADVISED TO CALL THE MANUFACTURER. THE MANUFACTURER WAS CALLED AND STATED THAT THERE WAS NO RECALL. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 126,000.”
Owner complaint to NHTSAFiled Jul 20, 2018Visibility, EngineODI 11112562

Showing 6 of 47 reports. Read every report on NHTSA.gov.

Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 10, 2026NHTSA vehicle page

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.