Question about 2005 GMC Envoy
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Posted on Jan 02, 2017
yes, good suspect.. but code check it for soft codes you may not be seeing a check engine light..also related are O2 sensor/computer itself/TPS/ oil pressure switch/ resistance to fuel pump after warm(failing) and some others.........good luck
Posted on Dec 08, 2008
SOURCE: 1998 GMC Sierra 2500 5.7L
starting definately has a lot to do with the crank/cam position sensors, but it wouldnt have nothing to do with hot or cold weather, oxygen sensor will make the vehicle run too rich if its out, you will smell fuel very strong out the exhaust, that could make it run sluggish also, and usually if the mass air flow sensor goes out the vehicle wont start at all...
Posted on Nov 27, 2010
SOURCE: 2004 GMC Envoy 4.2 liter
Pump replacement is fairly involved, but the issue is rarely the pump, as it is pretty indestructable. If you have low pressure, usually some clearances are too loose, somewhere. There is also sending unit issues, so measure your pressure with an external "known good" gauge.
Posted on Mar 03, 2011
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