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98 gmc Yukon with 120000 miles i have good oil pressure when the engine is cold but when it warms up it drops to 0 at idle speed and when i get goin it will go to 20 what is the problem?
Wiki User
∙ 16y ago
Could be a bad oil pressure sending unit Try a manual gauge to determine actual oil pressure Could be excessive engine wear (bearings) Could be a weak oil pump Try a heavier viscosity oil i.e. 20W-50
Wiki User
∙ 16y ago
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