I have 2002 Hummer H1 that has a the 4l80E in it with 68000 miles on it. I changed out my timing chain to Leroy's timing gears and messed up the injection pump timing. I took the truck to a mechanic friend that new how to fix the timing and while he had his computer hooked up he told me the...
I am new here and usually hang out on the Hummer forum. I just did a complete rebuild of the cooling system on my H1 and am now getting a P0216 code with the first start of the day. I can clear the code and it will not come back until the truck has completely cooled off. Below is what I have...