cgraydotcom

A few days ago, my oil pressure gauge started moving in the positive direction. Now it faces almost straight down. It also makes some clicking noises when you start the truck. Is this the sending unit causing problems, or the gauge itself inside the dash? Im pretty sure Im not running at 300lbs of oil pressure. Thanks.

03CavyMan

It's more than likely the cluster. If you want it fixed, the whole cluster will have to be replaced. I'd take it to the dealer, they'll check the oil pressure with the scanner and if it reads normal, you'll need a cluster.

Good luck

__________________
2000 Chevrolet Silverado Regular Cab Short Box
4.3L Vortec - 5 speed
Ion Alloy 16x8" chrome wheels
Magnaflow Catback Exhaust
K&N Intake, Throttle Body Spacer

GM Automotive Technician
Previously - 2003 Chevrolet Cavalier

MT-2500

First suspect is the oil pressure sending unit.
First check is it unplugged?
Always a good idea to put a manual test gauge on it and see if what the actual pressure is.
MT

__________________
Remember proper testing gives us the answer to many problems.
MT

klinn

What does the engine oil pressure read with the key on engine off? The 97+ Corvettes were known for the sending unit going bad and the gauge reading 200+ psi. With the key on engine off they would read about 70psi. If the gauge reads oil pressure with the engine off and key on, unplug the sending unit (top of engine, driver side, behind intake manifold), if the gauge reads 0, I'd suspect the sending unit. It would be good, like MT suggested, to check the actual oil pressure, just to make sure engine damage won't happen. Hope this helps. The only really know gauge issues with all the C/K trucks were with all the gauges not working (there is a program update for this) & an etching/scratching noise (kinda like you described, it is the tach. gauge). They use a "stepper motor" to run the gauge, GM has come out with an updated stepper motor, but you have to get the whole cluster to get the updated stepper motor. Usually you can aggrevate the noise by raising the RPM while sitting still. If you hear the noise while the tach is coming down, and then mostly stops when the tach reads idling RPM, it is most likely the stepper motor. HOpe this helps.

__________________