Circuit/System Verification
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON, verify DTC B0460 or B0462 is not set.
- If either DTC is set, refer to DTC B0460 or B0462 .
- If all circuits test normal, replace the coolant heater.