2012 GMC Sierra Owner's Manual - Page 429

Vehicle Care 3. Turn the bulb socket (C) one‐quarter turn to release the bulb socket from the lamp housing (A). 4. Pull the bulb (B) from the bulb socket (C). 5. Reverse the steps to install. Exterior Lamp High-Beam Headlamp Low-Beam Headlamp License Plate Lamp Stoplamp/Taillamp/ Turn Signal Lamp Sidemarker Lamp Stoplamp/Turn Signal Lamp/ Taillamp* * Chassis Cab Models For replacement bulbs not listed here, contact your dealer. Bulb Number 9005 H11 168 3047K 194 1157 10-43 Electrical System Electrical System Overload The vehicle has fuses and circuit breakers to protect against an electrical system overload. When the current electrical load is too heavy, the circuit breaker opens and closes, protecting the circuit until the current load returns to normal or the problem is fixed. This greatly reduces the chance of circuit overload and fire caused by electrical problems. Fuses and circuit breakers protect power devices in the vehicle. Replace a bad fuse with a new one of the identical size and rating. If there is a problem on the road and a fuse needs to be replaced, the same amperage fuse can be borrowed. Choose some feature of the vehicle that is not needed to use and replace it as soon as possible. Replacement Bulbs Exterior Lamp Back-up Lamp Back-up Lamp* Cargo Lamp and Center High-Mounted Stoplamp (CHMSL) Fender Marker Front Turn Signal Lamp, Sidemarker Lamp, and Parking Lamp Bulb Number 921 1156 912 W5WLL 3157A