Repair Instructions

WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.

Perform the Diagnostic Repair Verification after completing the repair.

Refer to Relay Replacement (Attached to Wire Harness)Relay Replacement (Within an Electrical Center) for Secondary Fuel Pump Relay replacement.
Refer to Control Module References for K20 Engine Control Module replacement, programming and setup.