Question about 2006 GMC Envoy Denali
could be one of two things, oil pressure switch (located on top of engine behind intake) or instrument panel cluster, if your vehicle has under 70,000 miles, it's covered under warrenty
Posted on Jun 19, 2009
The sulfur content in the fuel is contaminating the contacts of the sending unit.
Some people have had good luck with some fuel system cleaners solving this problem. The cheap stuff doesn't seem to do the job.
Not that GM isn't completely exonerated from fault but the gas stations don't do a very good job of watching what the stations sell.
Posted on Jun 20, 2009
This is a safety feature that the vehicle brings. You need to reset the E.C.U on dealership or it will keep doing it to you. It was probably caused by one single time that you did not closed the fuel cap correctly. Good luck
Posted on Dec 29, 2009
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