Repair Instructions
WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
Perform the Diagnostic Repair Verification after completing the repair.
- Engine Wiring Harness Junction Block Replacement (LGX) .
- Relay Replacement (Attached to Wire Harness) , or Relay Replacement (Within an Electrical Center)
- Control Module References for engine control module replacement, programming, and setup.