Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hi there, I am Cam.Sorry to hear about this issue. L:Et see what we can do.First is to try a reset. Take the battery cables off the battery, hold the ends together for 10 seconds then attach them to the battery and see what happens. This will reset the whole vehicle.If you have 2 batteries, then remove both and touch only one set. This reset is more about touching the cables together when off the battery than taking them off. The act of touching them drains the capacitors and forces it to reset.If this does not help, post your VIN so I can see some of the options your truck has.
Ok, do you have the means to check for diagnostic trouble codes?
Its possible that the surge when you connected it did damage the PCM. For this I would see if I could communicate with the PCM on the scanner. IF not then follow diagnosis for that, which is checking power, ground and the data line to the PCM. IF there is no issues identified then it requires a new PCM. This requires that scanner that views live data. Without that we are guessing.
I have not worked one one personally with this issue but have assisted a handful of people with this issue. It is very unlikely and I can only assume the pcm was weak to start with if that surge took it out.
IT could be the BCM As well, This is where testing with scanner and seeing which you can communicate with is the start.