Replacement Bulbs; Electrical System; Overload - GMC Yukon XL Denali Owner's Manual

10-36 Vehicle Care

Replacement Bulbs

If the vehicle is a hybrid, see the
hybrid supplement for more
information.
Exterior Lamp
Back-up Lamp
License
Plate Lamp
Rear Turn Signal
Lamp, Taillamp,
and Stoplamp
Side Marker Lamp
For replacement bulbs not listed
here, contact your dealer.

Electrical System

Electrical System

Overload

Bulb
The vehicle has fuses and circuit
Number
breakers to protect against an
electrical system overload.
7441
When the current electrical load is
W5WLL
too heavy, the circuit breaker opens
and closes, protecting the circuit
until the current load returns to
7443
normal or the problem is fixed. This
greatly reduces the chance of circuit
overload and fire caused by
194
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.
Headlamp Wiring
An electrical overload may cause
the lamps to go on and off, or in
some cases to remain off. Have the
headlamp wiring checked right away
if the lamps go on and off or
remain off.