Circuit/System Verification
WARNING: This page is about a different car, the 2013 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON.
- Verify DTC U1811 is not set.
- If DTC U1811 is set
Refer to DTC U0074 (Chassis Expansion Bus) , DTC U0074 (Powertrain Expansion Bus with HP6) , DTC U0074 (Mid Speed GMLAN) , DTC U0074 (Powertrain Expansion Bus without HP6) .
- If DTC U1811 is not set
- If DTC U1811 is set
- All OK