Question about 2003 GMC Sierra

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2003 sierra 2500 shuts down at no particular time or reason

I can be driving along and it just stops..I have had a diagnotis on it but it says its okay because it doesn't do it when they are testing..My driver window stopped working, horn doesn't work, and the drivers seat moves forward and backward, only in reverse...figure that out...I need to tow a trailer soon but I don't want my truck to just stop..I can disconnect the battery and reconnect, then it will start ?????? Any help ???

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Posted on Jun 19, 2009

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1 Answer

Happens more frequently in cold weather 2003 gmc Sierra 2500 had driving along and lose power truck is running but no response on the gas pedal I have to get out and press down on the relays in the fu


I've not run across this but let's apply some basic logic.
1. WHICH relay causes the problem to go away. Not like to be all of them. It's possible that something internal in the relay is "reconnected" when you push down.
2. Inspect that relay where it plugs in for evidence of excessive heat to the connectors or around the perimeter. If it's warped it may not seat correctly and you may have an electrical ground problem
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