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: oil pressure guage on '01 Duramax tament 06-06-2010, 11:57 AM I just replaced the water pump on my '01 Duramax. Put everything back together and the water pump works fine, but now the oil pressure gauge is pegged out at max - doesn't change. Anyone know what the problem could be? Thanks 4320Diesel 06-06-2010, 03:52 PM if these gauges are the same as the older trucks, it sounds like the sending unit wire is unhooked or broken. 02 2500hd 06-06-2010, 09:15 PM if these gauges are the same as the older trucks, it sounds like the sending unit wire is unhooked or broken. that would be my guess TheBac 06-06-2010, 09:21 PM Makes sense. Isnt the O/P sender on the 01's located up front near the W/P? thefermanator 06-07-2010, 10:23 PM Makes sense. Isnt the O/P sender on the 01's located up front near the W/P? Yes, just behind it and down some. | ||