I have 2003 GMC Safari, Oil pressure gauge has been fluctuating from 0 at idle and 40 on highway going down to 0 and back up
Jun 23, 2011 at 2:47 PM
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WRENCHTECH
CAR REPAIR CONTRIBUTOR
20,761 POSTS
Test it with a manual gauge and see if that is accurate. It might be cheaper to just throw a new oil pressure sender into it to see if that changes anything.