I need to address this '08 GMC/LMM/Ally 1000. Present mileage is around 140k
Symptoms are essentially limp mode and a P0847.....which reads as Circuit B in my Autel (this code seems a bit tricky as in earlier years it was seemingly sometimes Circuit D???).
I have not yet experienced this but the owners tell me in Tow/Haul the symptoms are not present -- does this make sense? I'm wondering if it's just coincidence.
I was finally able to lay hands on it today and wanted to inspect the wiring harness before contemplating a parts order. Sure, enough, the plug was soaked with ATF both externally and internally.
Furthermore, the heat shield was missing the rear bolt and the harness had been chafing on the shield a bit. I did find a solid blue wire that had worn through the insulation. It's weird as I'm the only one who has serviced this truck since ~30k miles so I'm not sure how the rear bolt went missing.
Anyway, I'd love to hear suggestions on a course of action from here. Specifically would you just replace solenoid B and the wiring harness? Or all the solenoids and the wiring harness? Can I test circuit B with mere-mortal tools?
Chafed wire and finger indicates missing bolt location:
Symptoms are essentially limp mode and a P0847.....which reads as Circuit B in my Autel (this code seems a bit tricky as in earlier years it was seemingly sometimes Circuit D???).
I have not yet experienced this but the owners tell me in Tow/Haul the symptoms are not present -- does this make sense? I'm wondering if it's just coincidence.
I was finally able to lay hands on it today and wanted to inspect the wiring harness before contemplating a parts order. Sure, enough, the plug was soaked with ATF both externally and internally.
Furthermore, the heat shield was missing the rear bolt and the harness had been chafing on the shield a bit. I did find a solid blue wire that had worn through the insulation. It's weird as I'm the only one who has serviced this truck since ~30k miles so I'm not sure how the rear bolt went missing.
Anyway, I'd love to hear suggestions on a course of action from here. Specifically would you just replace solenoid B and the wiring harness? Or all the solenoids and the wiring harness? Can I test circuit B with mere-mortal tools?
Chafed wire and finger indicates missing bolt location: