New oil pressure sensor went bad

diezelraccoon · Jul 4, 2024

A couple weeks ago I replaced the oil pressure sending unit on my 03 Tahoe because the gauge was pegged at 80. It ended up fixing the issue but then today it pegged back at 80 so clearly it went bad. I replaced with an ACdelco brand part.

Any ideas as to what caused this or perhaps it’s another issue? I don’t know if it has anything to do with the little screen when replacing the filter. I read not all of them have the little screen and I couldn’t seem to feel for one when I replaced the sending unit.

strutaeng · Jul 4, 2024

The filter/screen showed up on next generation body style with AFM/DOD; your truck doesn't have the filter.

You could have a chaffed wire getting grounded causing the sender to peg out? The wire insulation will wear out right at the connector and can touch each other. Your model has 3 wires at the connector. Check that before replacing the sender again.

Doubeleive · Jul 4, 2024

diezelraccoon said:
A couple weeks ago I replaced the oil pressure sending unit on my 03 Tahoe because the gauge was pegged at 80. It ended up fixing the issue but then today it pegged back at 80 so clearly it went bad. I replaced with an ACdelco brand part.

Any ideas as to what caused this or perhaps it’s another issue? I don’t know if it has anything to do with the little screen when replacing the filter. I read not all of them have the little screen and I couldn’t seem to feel for one when I replaced the sending unit.

this reportedly happens more often than it should return it and get a replacement.

Fless · Jul 4, 2024

Where did you source this AC Delco part? There are lots of knockoffs out there. Buy from a brick and mortar store or another trusted vendor (dealer, RockAuto, etc.).

OR VietVet · Jul 4, 2024

Who was the manufacturer of the first sender? Are you saying the sender was replaced and then went bad again and you then replaced with an AC Delco part, the second time? Your flow, to me, is confusing. Yes, there is no screen.

Scottydoggs · Jul 4, 2024

i went through 3 of them damn things on a another car i owned. original one leaked. then the next 3 all leaked within days of install. 4th times a charm? lol all of them were acdelco too. ive heard lots of dead new in the box o/p sensors over the years. seems to be a trend.

Marky Dissod · Jul 4, 2024

AC Delco / GM OE just ain't what they used to be.

Tonyrodz · Jul 4, 2024

I replaced two oem op senders within months of each other. Quality isn't what it used to be.

diezelraccoon · Jul 4, 2024

Fless said:
Where did you source this AC Delco part? There are lots of knockoffs out there. Buy from a brick and mortar store or another trusted vendor (dealer, RockAuto, etc.).

I bought it off amazon, ACdelco original GM part.

diezelraccoon · Jul 4, 2024

OR VietVet said:
Who was the manufacturer of the first sender? Are you saying the sender was replaced and then went bad again and you then replaced with an AC Delco part, the second time? Your flow, to me, is confusing. Yes, there is no screen.

The old unit was bad, I replaced it a few weeks ago with a new ACDelco brand one. It fixed the issue but then yesterday the gauge pegged out at 80.

New oil pressure sensor went bad

diezelraccoon

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strutaeng

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