I changed the throttle position sensor on my 2008 GMC Sierra twice thinking the 1st one was faulty. The check engine light is still on and the code indicates it's still the TCS. What else could the problem be?

Asked by Nov 22, 2014 at 06:24 PM about the 2008 GMC Sierra 1500 SLE1 Crew Cab

Question type: Maintenance & Repair

4 Answers

64,445

This all depend,s,,did you reset the ECM?And doe,s truck run normal?

2 of 2 people found this helpful.
2,095

I also heard of having the dealer having to downloading software to the EMC as part of a recall for for this or a similar problem on 2008 - 2011 GMC and Chevy trucks.

2,095

I meant "to the ECM"

415

Have you replaced the gas cap? You can avoid it for a little while by applying Vaseline around the rubber seal on the cap itself! Take you a qtip dip into the Vaseline then spred around the seal.

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