I have a 2004 H2, the Gauge went to 80 bs and stayed there, went on amazon and got a New GM oil switch, it lasted for a month and failed. Replaced it with another Delco GM switch and it lasted 3 weeks and went back to 80 Lbs, replaced it and it lasted 2 weeks and now the low alarm oil is coming on, i know its the sensor, called Hummer and they said its a bad sensor.......

i checked the wiring harness and looks all good, no oil in pack....

Talked to a company who rebuilds the dash and renews the Gauge packs ,they said its the sensor also...

suggestions on another Manufacture of oil switchs ?

 

What type engine oil are you using?

 

Mobil 1, Full Synthetic, 5 w 20, since 2004...changed every 6k

 

20? What does the gauge read KOEO?

 

book calls for 5w20, it not available 10w30 is allowed, the first Delco switch,I had replaced worked for 6 weeks, showing 20 lbs at idle, and 40 lbs at 3.5 k RPM...

I usually drive I-95 at 80 mph,she purrs at that speed, and as usual I’m passed up like I’m standing still....lol

all 2 that failed went straight to 80 psi as soon as u turned the key on, this one (no# 3 ) is showing low oil alarm at 5 lbs at idle and goes to 40 psi once you hit the gas....checked oil and it’s new/clean and full....

had shop do a manual oil pressure test, it was 22lbs pressure at idle warmed up....so it’s the switch again....

someone suggested replacing the entire dash cluster,I’m not ready to spend 500$ on a new cluster to find out it’s just bad switch’s....

I found a switch made by alco, on Amazon I have them throw that in,maybe I’ll get lucky, 3 A/C Delco down, I’ll try a foreign one and see...

 

The French version?

2004 HUMMER H2 Owner Manual

 

If you are buying the Delco switches on Amazon, there is a good chance they are fake. AC Delco is one of the most counterfeited brands of auto parts. I would try one from the local GM dealer.