Suburban 1/2 Ton 4WD V8-350 5.7L (1986)
Backup Lamp Switch: Service and Repair
MANUAL TRANSMISSION MODELS
Column Mounted Type
1. Disconnect battery ground cable.
2. Disconnect switch wiring harness.
3. Remove switch retaining screws and switch.
4. Assemble new switch onto column, then install retaining screws.
5. Reconnect battery ground cable, then check switch for proper operation.
Transmission Mounted Type
1. Disconnect battery ground cable.
2. Raise and support vehicle.
3. Disconnect switch wiring harness, then remove switch from transmission.
4. Reverse procedure to install, then check switch for proper operation.
Models With Neutral Start/Mechanical Lockout
1. Disconnect battery ground cable.
2. Disconnect wiring harness connectors at switch.
3. Remove switch retaining screws and switch from mast jacket.
4. Place gear selector in neutral, then align actuator on new switch with hole in shift tube.
5. Position connector side of switch into cutout in lower jacket, then push down on front of switch until tangs snap into holes in jacket. Install
retaining screws.
6. Reconnect wiring harness connectors, then place shift lever in Park.
7. Reconnect battery ground cable, then check switch for proper operation.