Question about 2004 Chevrolet TrailBlazer
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Few things can cause this issue. It can be a disconnected vacuum hose somewhere so please have a good look at it. It can be a faulty TPS (throttle position sensor) too. If the TPS is faulty the throttle response tends to fail so you will need to have it replaced. Regarding the shifting, I strongly suggest that you replace the automatic transmission fluid. If the fluid is burnt, the shifting tends to be rough and may shift only on high rpm.
Once the fluid is replaced, a smooth ride and shifting will be noticeable. Please have the following be checked to resolve the issue.
Have a good one and thank you for using FixYa!
Posted on Mar 11, 2011
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Posted on Jan 02, 2017
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