GMC overheating

GMC
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PROSISETY
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I have a 1991 GMC Seirra with 162,000 miles. with a 350. I have changed the themosat, and the radiator and my truck still is over heating what can i do ....
Jun 23, 2007 at 10:28 AM
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DANIMALGMC
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You might try a compression check.
It sounds like you have a bad head gasket.
Some parts stores and/or dealers have a chemical you can add to the anti-freeze that will change color if exposed to exhaust gases.

Good Luck
Jun 25, 2007 at 4:08 AM
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