2003 GMC YUKON DENALI Owners Manual

Part C: Periodic Maintenance
Inspections
Listed in this part are inspections and services which
should be performed at least twice a year (for instance,
each spring and fall).
You should let your dealer’s
service department or other qualified service center do
these jobs. Make sure any necessary repairs are
completed at once.
Proper procedures
to perform these services may be
found in a service manual. See Service Publications
Ordering Information on page
7- IO.
Steering and Suspension Inspection
Inspect the front and rear suspension and steering
system for damaged, loose or missing parts, signs of
wear or lack of lubrication. Inspect the power steering
lines and hoses for proper hook-up, binding, leaks,
cracks, chafing, etc.
Exhaust System Inspection
Inspect the complete exhaust system. Inspect the body
near the exhaust system. Look for broken, damaged,
missing or out-of-position parts as well as open seams,
holes, loose connections or other conditions which
could cause a heat build-up in the floor pan or could let
exhaust fumes into the vehicle. See Engine Exhaust
on page 2-29.
Fuel System Inspection
Engine Cooling System Inspection
Inspect the complete fuel system for damage or leaks.
Inspect the hoses and have them replaced
if they
are cracked, swollen or deteriorated. Inspect all pipes,
fittings and clamps; replace as needed. Clean the
outside of the radiator and air conditioning condenser.
To help ensure proper operation, a pressure test of
the cooling system and pressure cap is recommended
at least once a year.
Transfer Case and Front Axle
(All-Wheel Drive) Inspection
Every 12 months, or at engine oil change intervals,
check front axle and transfer case and add lubricant
when necessary.
A fluid loss could indicate a problem.
Check and have it repaired,
if needed. Check vent
hose at transfer case for kinks and proper installation.
Brake System Inspection
Inspect the complete system. Inspect brake lines and
hoses for proper hook-up, binding, leaks, cracks,
chafing, etc. Inspect disc brake pads for wear and rotors
for surface condition. Inspect other brake parts,
including calipers, parking brake, etc. You may need
to
have your brakes inspected more often if your driving
habits or conditions result in frequent braking.
6-1 4

Part D: Recommended Fluids and
Lubricants
Flyids and lubricants identified below by mme,
part number or specification may be obtained from
your dealer.
Usage
Engine Oil
Engine Coolant
Hydraulic Brake
System
Windshield
Washer Solvent
Fluid/Lubricant
Engine oil with the American
Petroleum Institute Certified for
Gasoline Engines starburst symbol
of the proper viscosity. To determine
the preferred viscosity for your
vehicle's engine, see Engine
Oil on
page
5- 13.
50/50 mixture of clean, drinkable
water and use only
DEX-COOL@Coolant. See Engine
Coolant on page
5-22.
Delco Supreme 1 l@ Brake Fluid or
equivalent
DOT-3 brake fluid.
GM Optikleen@Washer Solvent or
equivalent.
Usage
Power Steering System
Automatic
Transmission
Key Lock
Cylinders
Chassis
Lubrication
Front and
Rear Axle
Transfer Case
Fluid/Lubricant
GM Power Steering Fluid (GM Part No.
U.S. 1052884, in Canada
993294, or equivalent).
DEXRON@-Ill Automatic
Transmission Fluid.
Mulit-Purpose Lubricant, Superlube
(GM Part No.
U.S. 12346241 , in
Canada 10953474, or equivalent).
Chassis Lubricant (GM Part No.
U.S. 12377985, in Canada
88901242, or equivalent) or lubricant
meeting requirements of NLGl
#2,
Category LB or GC-LB.
SAE 75W-90 Synthetic Axle Lubricant (GM Part
No. U.S.
12378261, in Canada 10953455) or
equivalent meeting GM Specification
99861
15.
DEXRON@-Ill Automatic
Transmission Fluid.
6-1 5

Usage Fluid/Lubricant
Spline Lubricant, Special Lubricant
Front Axle (GM Part
No. U.S. 12345879, in
Propshaft Canada
I095351 1) or
lubricant
Spline meeting requirements
of
GM
9985830.
Hood Hinges
Body Door
Hinge Pins,
Tailgate Hinge and Linkage,
Folding Seat
and Fuel Door
Hinge Multi-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241, in
Canada
10953474, or equivalent).
Mulit-Purpose Lubricant, Superlube
(GM Part
No. U.S. 12346241, in
Canada
10953474, or equivalent). Outer Tailgate
Handle Pivot Points
Weatherstrip Conditioning
I
Weatherstrip Squeaks
I
____
Fluid/Lubricant
Multi-Purpose Lubricant, Superlube
(GM Part
No. U.S 12346241, in
Canada
10953474, or equivalent).
Dielectric Silicone Grease (GM Part
No. U.S. 12345579, in Canada
1095301 4, or equivalent).
Synthetic Grease with Teflon,
Superlube (GM Part
No. U.S.
12371287, in Canada 10953437, or
equivalent).
6-1 6

Part E: Maintenance Record
After the scheduled services are performed, record the date, odometer reading and who performed the service and
any additional information from “Owner Checks and Services’’ or “Periodic Maintenance” on the following record
pages. Also, you should retain all maintenance receipts.
Maintenance Record
6-1 7

Maintenance Record (cont’d)
6-1 8

Maintenance Record (cont’d)
6-1 9

Maintenance Record (cont’d)
6-20

Section 7 Customer Assistance Information
Customer Assistance Information ...................... 7.2
Customer Satisfaction Procedure
...................... 7.2
Online Owner Center
...................................... 7.3
Customer Assistance for Text Telephone
(TTY) Users
............................................... 7-4
Customer Assistance
Off ices ............................ 7.4
GM Mobility Program for Persons with
Disabilities
.................................................. 7.5
Roadside Assistance Program
.......................... 7.5
Courtesy Transportation ................................... 7.7
Reporting Safety Defects .................................. 7.9
Government
............................................... 7.9
Government
............................................... 7.9
Reporting Safety Defects
to General Motors ..... 7.10
Reporting Safety Defects
to the
United States
Reporting Safety Defects
to the Canadian
Service Publications Ordering Information
......... 7.10
7- 1