ignition GMC YUKON DENALI 2003 Repair Manual

A. Spare Tire (Valve Stem Pointed Up)
B. Hoist Assembly
C. Hoist Cable
D. Tire Retainer
E. Hoist Shaft
F. Hoist End of Extension Tool
G. Hoist Shaft Access Hole
H. Wheel Wrench
I. Jack Handle Extensions
J. Hoist Lock (If Equipped)
1. If your vehicle is equipped with a hoist lock (J),
open the spare tire lock cover on the bumper
and
use the ignition key to remove the lock.
2. Assemble the wheel wrench (H) and the two jack
handle extensions
(I) as shown.
5-66

*I - Gasoline Engine and Fuel Injection Rail #2.
*2 - Gasoline Engine and Fuel Injection Rail #l.
*3 - Gasoline Engine; Oxygen Sensors.
*4 - Gasoline Engine; Oxygen Sensors.
*5 - PCM Ignition
I Fuses I Usage I
I STUD #1 I
Battery-and Diesels
Only)/Dual Battery (TP2) Do
not -install fuse.
Mid Bussed Electrical Center
MBEC Power
Feed, Front Seats,
LBEC Door Modules, Door Locks,
Auxiliary Power Outlet-Rear
Cargo Area and Instrument
Panel
STUD 2 Accessory
Powerflrailer
Wirinq Brake Feed LBEC
1
~~
I RR PARK I
Right
Rear Parking and
Sidemarker LamDs
I
5-93

Fuses
RR HVAC
Usage
Rear Climate Control
AUX PWR I
Auxiliary Power
Outlet
- Console
IGN
1
PCM 1 Ignition Relay
Electronic Throttle Control,
ETC/ECM Powertrain Control Module
Electronic Brake Controller
IGN E Instrument Panel Cluster,
Air
Conditioning Relay, Turn
SignaVHazard Switch, Starter
Relav
RTD I Ride Control I
TRL B/U
~~
I Backup LampsTrailG Wiring 1
PCM B I
Powertrain Control Module,
Fuel Pumr,
I I
F/PMP I Fuel Pump (Relay)
B/U LP
I
Back-up Lamps, Automatic
Transmission Shift Lock
I
Control System
RR DEFOG
Rear Window Defoaaer
HDLP-HI
~~~ ____
HeadlampHighBeam Relay
PRIME Not Used
Fuses I Usage I
SIR Supplemental Inflatable
Restraint System
FRT PARK
DRL Front Parking Lamps,
Sidemarker Lamps
Daytime Running Lamps
(Relav)
SEO IGN
Truck Body Controller Ignition
TBC IGN1 Rear
Defog Relay
HI HDLP-LT High
Beam Headlamp-Left
LH HID Not
Used
DRL
I Davtime Runnina LamDs I
Instrument Panel
IPC/DIC Cluster/Driver Information
HI HDLP-RT
HDLP-LOW High
Beam Headlamp-Right
Headlamp Low Beam Relav
A/C COMP
I Air Conditionina Comm-essor I v
A/C COMP Air
Conditioning Compressor
Relav
5-94

Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn
the ignition key
to LOCK in each shift lever position.
0 The key should turn to LOCK only when the
The key should come out only in LOCK.
shift
lever is in PARK (P).
Parking Brake and Automatic
Transmission Park
(P) Mechanism
Check
WI..,.J you are doin, ,his cl.,:k, your --hide
could begin to move. You or others could be
injured and property could be damaged. Make
sure there is room in front
of your vehicle in
case it begins to roll. Be ready to apply the
regular brake at once should the vehicle begin
to move.
Park on a fairly steep hill, with the vehicle facing
downhill. Keeping your foot on the regular brake, set the
parking brake.
To check the parking brake’s holding ability: With
the engine running and transmission in NEUTRAL
(N), slowly remove foot pressure from the regular
brake pedal. Do this until the vehicle is held by the
parking brake only.
0 To check the PARK (P) mechanism’s holding
ability: With the engine running, shift to PARK (P).
Then release the parking brake followed by the
regular brake.
Underbody Flushing Service
At least every spring, use plain water to flush any
corrosive materials from the underbody. Take care to
clean thoroughly any areas where mud and other debris
can collect.
6-1 3

Gasoline Octane
........................................................ 5-5
Gate Operator and Canadian Programming ........ 2-40
Glass surfaces 3-o~
Glove Box ..................................................... 2-42
GM Mobility Program for Persons with
Disabilities
................................... 7-5
Specifications ............................................... 5-5
rn r nn ...............................................
H
Hazard Warning Flashers ............................... 3-5
Head Restraints
........................................... 1-6
Headlamp High/Low-Beam Changer
.................... 3-8
Headlamps
.................................................... 5-49
Bulb Replacement
....................................... 5-49
Front Turn Signal, Sidemarker and Daytime
Running Lamps
........................................ 5-50
Halogen Bulbs ............................................ 5-49
Headphones
................................................... 3-77
Heated Seats
................................................... 1-4
Heating
......................................................... 3-23
Highway Hypnosis
........................................... 4-35
Hill and Mountain Roads
.................................. 4-35
Hitches
.......................................................... 4-52
HomeLink Transmitter, Programming
.................. 2-38
HomeLinkO Transmitter
............................ 2-38
Hood Checking Things Under
................................ 5-10
Release
..................................................... 5-1 0
Horn ............................................................... 3-6
How
to Add Coolant to the Coolant Surge Tank ...... 5-29
How
to Add Fluid ............................................ 5-22
How
to Check ........................................ 5-20, 5-56
How to Check Lhrizzri-it ................................... 5-48
How
to Check Power Steering Fluid .................. 5-34
How
to Use This Manual ...................................... ii
How to Wear Safety Belts Properly ................... 1-30
Hydroplaning
.................................................. 4-31
I
If No Steam Is Coming From Your Engine .......... 5-27
If Steam Is Coming From Your Engine ............... 5-26
If the Light is Flashing
..................................... 3-39
If the Light Is On Steady ................................. 3-39
If You Are Stuck in Sand, Mud, Ice or Snow
....... 4-41
If You Do Decide To Pull
A Trailer ..................... 4-48
If You’re Caught in a Blizzard
........................... 4-39
Ignition Positions
............................................. 2-18
Ignition Transmission Lock Check
...................... 6-13
Illuminated Visor Vanity Mirrors
......................... 2-15
Infants and Young Children, Restraints
............... 1-50
Inflation -- Tire Pressure ..................... ..... 5-55
Inspection
Brake System
............................................. 6-14
Engine Cooling System
................................ 6-14
Exhaust System
.......................................... 6-14
Fuel System
............................................... 6-14
Part C
- Periodic Maintenance ....................... 6-14
7