Component Testing
WARNING: This page is about a different car, the 2017 GMC Yukon XL, 2017 GMC Yukon, 2017 Chevrolet Tahoe, and 2017 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
B227 Gear Position Sensor
- Key OFF. Disconnect the connector at the B227 gear position sensor.
- Remove the B227 gear position sensor from the transfer case.
- Connect the B227 gear position sensor.
- Verify that the Transfer Case Range Position Sensor parameter sweeps between -146° and 204° while rotating the center locating tab of the B227 gear position sensor.
- If the Transfer Case Range Position Sensor parameter does NOT sweep between -146° and 204°
Replace the B227 gear position sensor. Refer to Transfer Case Two/Four Wheel Drive Actuator Position Sensor Replacement .
- If the Transfer Case Range Position Sensor parameter DOES sweep between -146° and 204°
- If the Transfer Case Range Position Sensor parameter does NOT sweep between -146° and 204°
- B227 gear position sensor OK.