GM Service Manual Online
For 1990-2009 cars only

Battery power is supplied through a 30 amp fuse to a wiring harness located in the roof. Power is controlled with a switch located on the instrument panel. The customer or vehicle upfitter must complete the installation to an added accessory such as an emergency beacon lamp.

NOTE: Maximum rated electrical load is 21 amps (250 watts). The added electrical requirements must not exceed 21 amps (250 watts). Running the accessory for long periods of time with the engine off may run the battery down.

Your vehicle is equipped with wiring provisions for a 12-volt power supply (SEO 9L4). Refer to the following information when adding electrical accessories that will use the 9L4 12-volt power supply feeds connected to your vehicle's electrical system. After reading the following information, keep it with your owner's manual for future reference.