Hey fellas I have an 03 H2 I bought in Indiana when I was instructing for the railroad in PA. I drove Murphy all the way to California where I live now. No issues whatsoever (since my company paid for gas) As I was leaving from home depot one day I noticed my volt gauge was at 12 normally at 14. My temp normally at 220 was 200. My rpms were 500 normally at 800. Any idea what this could be? Batt and alt check fine on the multimeter.

 

the servo motors in the cluster fail. they sell rebuild kits on amazon and there are many videos on the repair replace procedures. gm used similar clusters on all there trucks.

 

thanks I'll look into that

 

Check the voltage at the battery while running to make sure your alternator is supplying the needed 14+ voltage.

 

p.s. Murphy is a great name for your rig.

 

Also check grounds..... poor grounds can cause all sorts of odd electrical issues. Some external ones underneath on frame under drivers door, some internal buried in the dash, etc.

 

yep 14.4v per OHM. Thanks Phil I was a Ranger in Mogadishu we all named our Humvees. Mine was Murphy and it got blown to s*** so I named this one in its honor

 

Thanks for your service Murphy.