B0224low severityBody
Auto-Dimming Mirror Circuit
on 2004 GMC Yukon 5.3L V8 Vortec · RWD
What this code means
Malfunction in the auto-dimming rearview or side mirror circuit.
Symptoms
- Mirror does not dim at night
- Mirror stays dimmed all the time
- Green tint to mirror
- Compass display not working (if equipped)
Common causes
- Faulty electrochromic mirror element
- Light sensor failure
- Wiring issue
- Mirror control module fault
Diagnostic steps
- Check mirror power and ground
- Test light sensor inputs
- Inspect mirror connector
- Verify mirror settings in vehicle menu
Repair notes
Replace auto-dimming mirror assembly.
Other Body codes on this vehicle
B0001
Driver Frontal Stage 1 Deployment Control
B0002
Driver Frontal Stage 2 Deployment Control
B0003
Passenger Frontal Stage 1 Deployment Control
B0004
Passenger Frontal Stage 2 Deployment Control
B0005
Driver Knee Airbag Deployment Circuit
B0006
Passenger Knee Airbag Deployment Circuit
B0010
Driver Side Airbag Deployment
B0011
Driver Side Airbag Deployment Circuit Open
B0012
Driver Side Airbag Deployment Circuit Short to Ground
B0013
Driver Side Airbag Deployment Circuit Short to Battery