First thing to do is do a manual pressure check with a gauge, it may be a sending unit or a gauge bad with that mileage and age of truck. A lot of times it is a bad oil filter. I only use Purolator, wix, napa and ac. Bosch is made by purolater. If he is going to replace pump it would be a good idea to look at bearing, but looking is just that not actually measuring for clearance. If above.004" then replace them.
Wednesday, April 13th, 2016 AT 9:41 AM