Thursday, January 7, 2010

My gmc 99 suburban oil gauge when i start the truck is pinned at 80 and the motor is clacking loudly for 5min?

then gauge goes back to 40 and all seems fine what is this ?My gmc 99 suburban oil gauge when i start the truck is pinned at 80 and the motor is clacking loudly for 5min?
I would change the engine oil and filter and put 1 can of lucas oil treatment in and fill with engine oil

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