Question about Hummer H2
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Posted on Mar 19, 2018
The fog lights run by default during the day in the "auto" position. To activate the headlights and the fog lights you need modify the jumper position in the fuse box for the lights. "see fuse box diagram"
Posted on Jun 26, 2009
I have the same vehicle and was able to remove mine with the following steps: 1) remove light behind each rear of luggage rack rail using phillips screwdriver (one screw each side). 2) remove molding underneath each light using T20 torx driver (2 screws each side). 3) Loosen cross rails nobs. 4) Side cross rails off of roof.
Posted on Dec 27, 2009
Just finished changing one out tonight on a 2004 H2 with 6.0L. It's on the back of the block, behind the intake manifold and beside the distributer. There is a wire harness connector on one side and a manifold bolt on the other so it's a tight space. Use a 12 point thin-wall deep socket (a 6 point deep impact socket won't clear). Then slid a 6" long piece of hose over the new unit to get started in the hole, wasn't enough room to get hands in to install without the hose.
Posted on Nov 24, 2010
SOURCE: The reduce engine power message
The Powertrain Control Module (PCM) is shutting down your throttle body control for some reason and limiting how much throttle you can apply. The only way to find out why it is doing this is to scan the PCM for Diagnostic Test Codes (DTCs) and diagnose any existing codes accordingly. It is very likely to be caused by a fault in your throttle position sensor or accelerator pedal position sensor circuits.
There is a Technical Service Bulletin (TSB) for your vehicle which covers a known problem with reduced engine power and sets DTC P2138. The known problem is that the Accelerator Pedal Position (APP) sensor circuits are being infiltrated by water intrusion into a connector and causing erratic voltage readings at the PCM. It is TSB reference # 07-06-04-019D
Posted on Jul 18, 2011
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