94 gmc 1500 5.7. Blew manifold gasket. Replaced it and its overheating. Replaced thermostat, radiator. Now will overheat, return to normal. bob up and down. Have great heat in cab all the time.

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Asked by Mar 14, 2015 at 08:25 AM about the 1994 GMC Sierra 1500 C1500 SLE Standard Cab LB

Question type: Maintenance & Repair

2 Answers

232,335

Air in the coolant system?

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was the 2nd manifold gasket over last few months. 1st was botchedjob. could it be old gasket sealant in system? Anything I can use to get it out? How can I get air out of system?

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