Re: MAJOR Problems - Need Help Desperately
P0601 is not a good code. If the vehicle is still running, it means the internal ROM chip is losing its integrity. The fix is to reprogram and see if that fixes the problem, if not, the PCM has to be replaced and the new on programmed. The only way to program the PCM is via a Tech 2 and the GM service programming system. You might be able to purchase an aftermarket PCM; not sure on this so someone else may chime in.
C0240 means the EBCM will not allow traction control/stability control since it cannot receive a confirmation from the PCM, via the class 2 serial data link, that the PCM is actively reducing (controlling) engine torque. This code may be a by-product of the P0601, due to the integrity of the ROM, and the PCM's calibration.
If there are any GM dealers in the area, they might have the equipment to program the module to see if it requires replacement. I believe SPS is used down there, and if so, the dealer might have access to all GM programs/calibrations via GM's TIS2WEB website. Again, not sure.
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Black Sheep Hummer Squadron
(ME TOO)
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