GMC 2012 Sierra - Manual (Page 429)

Black plate (43,1) GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
Vehicle Care 10-43
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.
Replacement Bulbs
Exterior Lamp Bulb
Number
Back-up Lamp 921
Back-up Lamp* 1156
Cargo Lamp
and Center
High-Mounted
Stoplamp
(CHMSL)
912
Fender Marker W5WLL
Front Turn Signal
Lamp, Sidemarker
Lamp, and
Parking Lamp
3157A
Exterior Lamp Bulb
Number
High-Beam
Headlamp
9005
Low-Beam
Headlamp
H11
License
Plate Lamp
168
Stoplamp/Taillamp/
Turn Signal Lamp
3047K
Sidemarker Lamp 194
Stoplamp/Turn
Signal Lamp/
Taillamp*
1157
* Chassis Cab Models
For replacement bulbs not listed
here, contact your dealer.
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.