1997 GMC Suburban Owner's Manual - Page 344

Electrical Svstem U Headlamps The headlamp wiring is protected by a circuitbreaker in the lamp switch. An electrical overload will cause the lamps to flickeron and off, or in some cases to remain off. If this happens, have your headlamp wiring checked right away. Add-on Electrical Equipment NOTICE: ~~ Don't add anything electrical to your vehicle unless you check with your dealer first. Some electrical equipmentcan damage your vehicle and the damage wouldn't be covered by your warranty. Some add-on electrical equipment can keep other components from working as they should. Your vehicle has an air bag system. Before attempting to add anything electrical to your vehicle, see "Servicing Your Air Bag-Equipped Vehicle" in the Index. Windshield Wipers The windshield wiper motor is protected by a circuit breaker and a fuse.If the motor overheats due toheavy snow, etc., the wiper will stop until the motor cools. Although the circuit is protected from electrical overload, overload due to heavy snow, etc., may cause wiper linkage damage. Always clear iceand heavy snow from the the windshield before using the windshield wipers. If the overload is caused by some electrical problem and not snow, etc., be sure to get it fixed. 6-62