20 Most Recent 2003 Hummer H2 - Page 9 Questions & Answers

well now you know the brake fluid have to be change every 20000 or 30000 miles

this is in the wiper control module. the dealer sells replacement kits with new boards and the cover. not too expensive. common problem.

Why not look for a used column with all the wiring harnesses and switches? I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

The problem could be the vacuum check valve that keeps the vacuum in the system.

I had this same problem with my 2003 H2, my mechanic found that the fuel diaphragm was cracked and this was allowing my truck to flood. If it was a cold start, the extra fuel would evaporate and it would start fine. It actually got to the point where I would stall at a stop light or stop sign at idle. The part was is the neighborhood of $175.00 and about 1 hour of labor to install.

You may need a shop manual to get the wiring diagrams. You may be able to register on some of the auto parts stores websites and get them for free.You'll need the diagrams to trace the wiring. If it is in the circuit board inside the cluster it will have to be sent to a repair shop.

1. Disconnect the spark plug wire at each spark plug.

• • Twist each spark plug 1/2 turn.
  • Pull only on the boot in order to remove the wire from each spark plug.

1. Disconnect the spark plug wire from the ignition coil.

• • Twist each spark plug boot 1/2 turn.
  • Pull only on the boot in order to remove the wires from the ignition coil

Install the spark plug wires at the ignition coil.

Install the spark plug wire to each spark plug.

Inspect the wires for proper installation:

Repeat above procedure for all 8 cylinders.

when you have antilock "problem " on this vehicle you automatically get t\c light, I fixed this problem for a friend when the tire rubbed through one of his abs sensor cables .. just re-connected it don't spend $500 at a "RELIABLE" shop if you can fix this yourself....they will never tell you how easy it might be to repair!!

please firts test the Fuse, if is blown, or loose, or bad contacts by corrosion. 2) see the schema attached you can bypass the swtich and try itGod bless you

Does your scan tool have a reset eeprom mode?

if not, try disconnecting the battery for a 30 min period, then try