Question about 1990 GMC Sierra
I have replaced the thermostat and check insure that the coolant level and mixture is acurate. I replaced the thermostat in hopes that the temp. guage would read accurately but it is stuck in the highest position. The vehicle isn't over heating but I would really like to fix this for peace of mind. Any advice or solution would be greatly appreciated. Thankyou.
Does your temp guage needle drop to Zero when you switch off ignition ?
If not, your temperature transmitter is faulty, or the wire running to it is earthing out somewhere.
Hope this is of help.
Good Luck !
Posted on Jan 16, 2009
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