bigbob

My current ride is an '03 Sierra 1500 2wd with a 4.8. I've got about 145,000 miles on it, and it seems to be in decent shape. But I'm wondering why it's running 80 lb.s of oil pressure. Is this common? Thanks in advance for any help.

IMI4tth3w

could be a couple things. could be its actually running 80 psi oil pressure, or your stepper motor in your gauge is out, or the oil pressure sending unit it out.

starting in 03-06 the stepper motors in the gauges go out. its pretty much going to happen unless you have them replaced. if you haven't had them replaced, thats probably where your problem is.

bigbob

Thanks for the quick reply! Stepper motor in the gauge? Is that a dealer only, or available elsewhere?

Atomic

iTrader: (42)

I would check the pressure with a mechanical gauge before I start throwing parts at it.

bigbob

Yeah, I was thinking about that, but I don't happen to have one handy. I'm more familiar with the Gen 1 small blocks and the Mark IV big blocks, where do I look for a place to tap into to get a read on the oil pressure?

zero2sixT

iTrader: (4)

80 psi at idle or at WOT?

03sierraslt

iTrader: (22)

That's what I was wondering.

javzh

iTrader: (4)

on my 04 the pressure would max out as soon as i set the key to the start position.
it was the oil pressure sensor. switched it out for a new one and everything is back to normal now.

DUALLS

Probably the sensor.PN-12616646

bigbob

WOW! You guys are great for helping a guy out! It stays at 80 whether at a light, in drive, idling, or when at speed.
And before IMI4tth3w mentioned the stepper motor I was thinking sensor as well. I had one go out on a '91 Camaro w/ a 305, and I think the one on my '88 Vette is leaking as well.