H3 Oil pressure gauge

[Somethingbigandorange]

Anyone install an oil pressure gauge? If you replaced the OEM unit how do you spoof the signal to the ECU to keep the oil warning off? Long story short I want an actual gauge not just an ‘idiot light’.

 

[JPaul]

I installed a MaxTow gauge on both my base I5 and my Alpha, and both of them kept the factory sensors (switch in the case of the I5).

The I5 (3.5L/3.7L) you just add a tee at the factory location so that both the oil pressure switch and the sender for the gauge have a home. It takes a few fittings to adapt it but it's pretty simple to do.

For the V8 I used a bypass plate (the 5.3L often has an oil cooler plumbed in after the filter but not on the Alpha's for some reason) that had a tapped hole in it, the factory sender is at the top back of the block.

Sent from my SM-N950U using Tapatalk

 

[JPaul]

Actually scratch the tee fitting, I just image searched for "hummer h3 oil pressure gauge" and remembered that there is a plug you can remove and then get an adapter to screw in where the oil galley plug went to use for the pressure sender on the I5's, it's right next to the oil pressure switch.