Mechanics

GMC SIERRA RADIATOR PROBLEM

1989 GMC Sierra

Hi truck came with 305 have put 4 different 350 in. Runs good for awhile says overheating by light and gauge oil pressure gauge always maxed out. Why do motors keep blowing head gaskets and or head?Do I need to pull ecm andhave flashed for 350 also need change tbi injectors
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February 7, 2013.



Nope, nothing,

did you replace the radiator? A clogged radiator will overheat all your motors

Roy



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