Question about 2001 GMC Yukon XL

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1997 Gmc yukon fuel relay switch continues to burn out. Replaced fuel pump twice and also took it the dealer but no solutions. Truck runs fine for sometimes weeks but the problem continues.

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  • Anonymous Mar 27, 2014

    fuel pump went out and replaced it getting plenty of fuel no spark to get going

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I would have to check the fuel pump with a scope to look at the pattern and check the amps it is drawing . the grounds need to be checked and the pcm checked and reflashed. on the fuel system that would affect the fuel pump and relay to where it would burn it out is grounds , pcm , fuel pump , fuel pump relay. so you should convince them to replace the fuel pump and fuel pump relay under warranty and replace the pcm . and get a diagram and check all grounds. If the pcm is damaged and the current has been affected and instead of say a 5 volt or 2 volt signal it now has a 13.5 volt signal or if a ground is out then the temp of the relay will keep rising non energized a relay is about 99 energized it is around 140 you can check to see how hot that relay is getting. and if i remember correctly you want the pcm drivers checked.

Posted on Jun 18, 2009

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