Circuit/System Verification

WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.

Engine running, observe the 42V Circuit Voltage parameter on the accessory DC power control module data list.

If the 42V Circuit Voltage parameter is greater than 48 volts, replace the K1 accessory DC power control module.
If the 42V Circuit Voltage parameter is less than 48 volts, replace the K43 power steering control module.