How to Shut Off GMC Sonoma Headlamps

The GMC Sonoma was a popular small-truck built by General Motors and sold from 1982 through 2005, when it was replaced by the GMC Canyon. The Sonoma has a traditional on/off headlamp system that uses halogen lighting. Leaving the lights on in your truck can drain your battery and harm your alternator, so it's important to know how to shut them off properly.

Instructions

1. Crank the engine. Locate the headlamp control switch to the left of the steering wheel. The headlamp control switch has a light bulb icon on it.

2. Turn the switch all the way to the left, with the selector on the empty circle icon.

3. Pop the hood and locate the rear of the headlamp assembly if you need to disconnect the headlamps' electrical wiring for repair purposes.

4. Disconnect the connection module plugged into the headlamp assembly. Repeat for each side.This will disable the headlamp without removing the bulb.

Tips & Warnings

• The GMC Sonoma is an identical vehicle to the Chevrolet S-10. These instructions will also work for the Chevrolet S-10.

• The GMC Sonoma is not equipped with daytime running lights. After turning the switch off, the headlamps should not be illuminated. If they are, you may have a faulty switch or a wiring problem. Bring the Sonoma to a service center immediately to avoid draining your charging system.

References

• Sonoma Owner's Manual

Resources

• Read this Article in Spanish