Sierra 3500 2WD V8-6.0L VIN U (2004)
Backup Lamp Switch: Service and Repair
ZF S6-650
Backup Lamp Switch Replacement
Removal Procedure
1. Raise and suitably support the vehicle. Refer to Vehicle Lifting. If equipped with a 6.6L engine, disconnect the backup lamp switch electrical
connector (3).
2. If equipped with a 8.1L engine, disconnect the backup lamp switch electrical connector (4).
3. Remove the backup lamp switch.
Installation Procedure