SOURCE: my 1997 gmc sonoma
This the problem with IAT bad inlet air temp (IAT) sensor.Get it replaced....................
SOURCE: Spuratic fuel gauge
the fuel gauge and fuel pump is one assembly in the fuel tank. You will need to drop the fuel tank. May be a loose connection or faulty sending unit
SOURCE: 2006 GMC Sierra electrical problem
If your Sierra has a Duramax, it may be the intake air heater or the fuel heater cycling on and off in the cold weather. But if its pulling the voltage down to 12V after warmup, I would suspect a poor battery. As suggested, get a load test at autozone or ??
SOURCE: window on drivers side wont go up or down but
Ours did this, too. We just had to wait for everything to reset (a few minutes) then it worked fine.
SOURCE: 2000 gmc sonoma service engine light on and
sound like the O2 sensor or PCV... take the car to autozone and they will use the ODB reader on it for free.I suspect one or the other sensor. How many miles do you have on it?
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