2003 Chevy Silverado 2500hd
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From: Buffalo
2003 Chevy Silverado 2500hd
I have a 03 Silverado 2500hd, I have been having problems for a while,it has been misfiring, I changed plugs wires, coils fuel filter and fuel injectors, now I am getting a u1003 code. Loss of communication with Powertrain multiple control system. And anyone know what is could be? All the wires look good
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First check to make sure mice have not eaten wires. Then check to see if your grounds are in good shape. Check your in and around the fuse box. Something is not letting it communicate. You might end up having to replace the interior box if are are sure all your wires are good
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From: Buffalo
First check to make sure mice have not eaten wires. Then check to see if your grounds are in good shape. Check your in and around the fuse box. Something is not letting it communicate. You might end up having to replace the interior box if are are sure all your wires are good
Is is the pcm the interior box? I’m not sure where to start looking
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From: Buffalo
How many grounds are there, do I check around certain censors, pcm, does the pcm have a ground wire? I looked online the u in code u1003 is for transmission do I look around down there