Question about 2005 GMC Envoy
PO-128 Coolant Thermostat, Temp Below Regulating Temperature
Leaking or stuck open thermostat
Coolant temp sensor
Cylinder head temp sensor
Engine coolant level
You could have more than one issue
The only way to answer your questions,is to put a scanner on your vehicle,and see what codes you have.
The codes you get,do not indicate a failure,necessarily
You have to follow a diagnostic process,to find any problems.
If you have been going to auto parts stores,to have codes read,and have no knowledge or intension of doing your own work,you need to find a good repair shop, and just have it repaired,fairly soon
Posted on May 25, 2010
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Posted on Jan 02, 2017
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