20 Most Recent 2004 Hummer H2 - Page 3 Questions & Answers

We had this problem on our H2. Ends up that we had to buy a new instrument cluster. In the mean time we used the speed calibration on our GPS unit to say out of tickets. A year later we finally replaced the cluster. Check out the Hummer forums for best places to buy.

if you are using defrost or any setting with defrost it runs through the a/c compessor

What did the pedal feel like. I'm going to guess you lost the vacuum assist on your master cylinder. More info please.

Leaving the gas cap off can make the warning light come on. You would need to have the computer scanned for trouble codes next.And if the truck stopped before you replaced the pads, I doubt replacing the master cylinder will fix the stopping problem.

THE POWER STEERING PUMP ON MOST OF THE LIGHT TRUCKS ANY MORE ALSO RUN THE POWER BRAKES, CHECK TO SEE IF YOU HAVE POWER STEERING LINES GOING TO AND COMING FROM THE BACK OF THE MASTER CYLINDER AREA. THATS THE HYDROBOOST ACTUATOR. REPLACE THE P/S PUMP AND FLUSH ALL THE LINES

TRY TO SPLICE A QUICK CONNECT AIR LINE FITTING