fuel pump went out / gas gauge stopped working

[l306x]

put a different gauge cluster in the Yukon and it did the same thing. It must be something in the wiring/sending unit but it all tests out ok .....out of ideas

 

[AtomicHoe094]

Grounding issue??

 

[SunlitComet]

The fuel level signal travels thru the pcm and a bad fuel pump should have not cause a blown pcm fuse. the pump is controlled by a relay which is controlled by the pcm. It is likely you pcm itself has failed. Use the linked procedure for diagnostics.

http://www.sunlitcomet.com/pdf/automotive/tahoe/2003/2003-gmc-yukon-fuel-gauge-inoperative.pdf

 

[l306x]

fuel pump runs off the pcm b fuse. anyway i got it fixed. the plug on the new oem module was bad. I put the plug from the old module into the new module and everything works.