2003 Chevrolet Trailblazer Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2003 Chevrolet Trailblazer
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2003 Chevrolet Trailblazer ProblemsFaulty thermostat causing SES light to illuminate
This vehicle has a thermostat that fails in the open position which causes the temp gauge to drop below normal and heater to fail. The thermostat is located on the driver's side of the engine behind the alternator. You might need to remove the wheel to access the mounting bolts. You will need multiple rachet extensions and some patience. Dealer wants $500 to replace thermostat. Do it yourself for less than $100.
My car's shifter is in the "Park" position, but the indicator on the dashboard says the car is in "Reverse." Because the car is not in Park or Neutral it will not start. I have already tried re-setting the ignition switch, but no luck
The fuel level sensor in the fuel tank may fail causing erratic fuel gauge operation. Our technicians tell us that on high mileage vehicles you may wish to replace the complete fuel pump module assembly if this condition occurs.
On certain 2005 - 2007 vehicles, General Motors has provided a special service policy covering the fuel level sensor, agreeing to pay 50% of the repair cost. This coverage extends for 10 years or 120,000 miles from the original "in service" date of the vehicle. Please contact your local GM dealer for more information.
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2003 Chevrolet Trailblazer QuestionsShifting through gears but truck wont move (1 answer)
03 trailblazer shifter moves but wont move
disconnected battery post
Also my car starts intermittently when I pull on the bright lights on the multi-purpose switch the car will start sometimes
2003 Chevrolet Trailblazer RecallsRecall 05V494000
The turn signals may operate like hazard flashers when intending to signal for a turn. The driver may not be able to clearly signal their intentions, increasing the risk of a crash. Dealers will replace the suspect flasher modules with a new flasher designed with sealed relays for better durability. The recall began August 4, 2005. The GM recall number is 05044.