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plaster dave
10-03-2006, 11:30 AM
I just got a code of P0700, on my 04 2500 gmc 4x4 it state it is a trans. control module. Does anyone know how to replace this part? Thanks Dave

dieseldog
10-03-2006, 08:45 PM
Whatever you do, DO NOT REPLACE THE TCM!!! P0700, means the TCM has requested the check engine light to come on. The TCM cannot turn the light on, so it has to request it, via the PCM. You have to read the other codes that are stored in the trans control module. Those codes will tell you the reason for the P0700. Does the truck have any power adders? If you bumped the power up considerably, that could be the problem.