Sierra 1500 4WD V8-5.3L VIN B (2005)
2. If equipped with a 8.1L engine, connect the backup lamp switch electrical connector (4).
3. If equipped with a 6.6L engine, connect the backup lamp switch electrical connector (3). Lower the vehicle.
2. If equipped with a 8.1L engine, connect the backup lamp switch electrical connector (4).
3. If equipped with a 6.6L engine, connect the backup lamp switch electrical connector (3). Lower the vehicle.