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2003 gmc envoy_slt
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101 Posts
Discussion Starter · #1 ·
I have no idea what is wrong with my truck... Whenever i turn on my ac the truck stalls. It only happens when the ac is on,,, it works fine if its just the fan. Can anyone help?
Thanks.
 

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2002 chevy trailblazer_ltz
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3,321 Posts
This is a much discussed problem on this forum. If you do a search, you'll see what i mean.

In any event, you need to do a cleaning of your throttle body. There's a "how to" in the articles section at the top of the page...here's the link:

http://forums.trailvoy.com/articles.php?do=viewarticle&artid=91


Make sure you disconnect the battery before you start this, and re-connect after you are completely done.
 

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137 Posts
This is when you have the engine idling? It's possible the throttle body is so dirty that the engine computer has the throttle plate open as far as it can compensate for needing cleaning so it can't adjust more for the extra power needed to keep the engine running.
 
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