Hi guys,
We have a Duramax (a frieds truck) with a lot of problems that seem to be based on a transmission problem or electronic problems. Its a 2003 Silverado 2500 HD D/A where the transfer case was replaced after it was broken. The guys partially dissassembled the Allison also as of not knowing what they do in the beginning to be honest. They got it together again and now the truck seems to work mechanically, but the electronics went nuts. If you drive the truck, usually if you go faster than 30 mph (you are probably in 3rd gear) the ally shifts down to first!? Without clearing codes there is no way to shift other than 1st anymore. Weird thing is that at the same time, the driver window gets out of function also. Here are the DTC´s we get every time now:
ECM P0700
TCM P0776, P0876
ABS C0055
From time to time, we also get those codes here:
ECM P1626, U1026
TCM P0746, P0876
ATC U1000
BCM B2615, B2645
DDM U1000
PDM U1000
SIR U1000
Any ideas from your side? I also sent this message as a PM to "the master of desaster" Mike L., but maybe someone else has an idea too...
THANKS!!!
We have a Duramax (a frieds truck) with a lot of problems that seem to be based on a transmission problem or electronic problems. Its a 2003 Silverado 2500 HD D/A where the transfer case was replaced after it was broken. The guys partially dissassembled the Allison also as of not knowing what they do in the beginning to be honest. They got it together again and now the truck seems to work mechanically, but the electronics went nuts. If you drive the truck, usually if you go faster than 30 mph (you are probably in 3rd gear) the ally shifts down to first!? Without clearing codes there is no way to shift other than 1st anymore. Weird thing is that at the same time, the driver window gets out of function also. Here are the DTC´s we get every time now:
ECM P0700
TCM P0776, P0876
ABS C0055
From time to time, we also get those codes here:
ECM P1626, U1026
TCM P0746, P0876
ATC U1000
BCM B2615, B2645
DDM U1000
PDM U1000
SIR U1000
Any ideas from your side? I also sent this message as a PM to "the master of desaster" Mike L., but maybe someone else has an idea too...
THANKS!!!