Replacement Bulbs; Electrical System; Overload - GMC 2012 Sierra Denali Owner's Manual

10-38 Vehicle Care

Replacement Bulbs

Exterior Lamp
Back-up Lamp
Center
High-Mounted
Stoplight (CHMSL),
Cargo Lamp
Front Turn Signal
Lamp, Sidemarker
Lamp, and
Parking Lamp
High-Beam
Headlamp
Exterior Lamp
Bulb
Number
Low-Beam
Headlamp
921LL
License
Plate Lamp
912LL
Rear Turn Signal
Lamp, Taillamp,
and Stoplamp
Sidemarker Lamp
3157A
For replacement bulbs not listed
here, contact your dealer.
9005LL

Electrical System

Bulb
Number
Electrical System
H11LL

Overload

The vehicle has fuses and circuit
168
breakers to protect against an
electrical system overload.
3047K
When the current electrical load is
too heavy, the circuit breaker opens
and closes, protecting the circuit
194LL
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.