2003 C-2500 When I try to read this truck, it will get through the VCM, but fails during the TCM read. Truck has a Superchip tuner, but I returned it back to stock to do the read. Anybody know what I should try next. BTW, I tied to use a trickle charger during the read, because the VCM voltage was showing 10.5 volt. With the charger it showed 12.3 volts....
Reply With Quote