It has been a couple weeks since last (I hope final) fix. The dealer along with Hummer engineer ended up replacing entire wiring harness. At one end of the harness at top front of engine they found 15-20 splices in harness from factory. Splices were quick solder connectors that were not properly installed. They do not know why factory would have done, but???. So if anyone is having problem or looking at your wiring harness you may check this out as I have had my H2 since July 10, 2002 and problem started occuring just a couple months ago.
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