Question about 2002 GMC Envoy

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Reduce engine light came on in my 2002 envoy and it feel as if the truck is not getting any power, why is that? the truck slowed down so i pulled over cut it off an started it back up. after starting back up the light came back on it slowed down again.

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Reduced engine power is just like a safe mode. First things first, clean your throttle body. It's possible the butterfly is sticking. Disconnect the battery, clean your throttle body with throttle body cleaner, must be nice and shiny. When finished, drive around for 20 minutes or so with all accessories off. This will allow the computer to relearn a properly functioning throttle body.

Posted on Mar 25, 2011


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What is best diagnostic scanner for 2002 Envoy with ses and reduced engine power lights on?

We have discussed this yesterday--- I believe

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