2003 CHEVROLET AVALANCHE Owners Manual

Engine Cooling System Inspection
Inspect the hoses and have them replaced if they
are cracked, swollen or deteriorated. Inspect all pipes,
®ttings 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
(Four-Wheel Drive) Inspection
Every 12 months or at engine oil change intervals,
check front axle and transfer case and add lubricant
when necessary. A ¯uid loss could indicate a problem;
check and have it repaired, if needed. On manual
shift transfer case, oil the control lever pivot point. Check
vent hose at transfer case for kinks and proper
installation. More frequent lubrication may be required
on off-road use.
Brake System Inspection
Inspect the complete system. Inspect brake lines and
hoses for proper hook-up, binding, leaks, cracks,
cha®ng, 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.
6-16

Part D: Recommended Fluids and
Lubricants
Fluids and lubricants identi®ed below by name, part
number or speci®cation may be obtained from your
dealer.
Usage Fluid/Lubricant
Engine OilEngine oil with the American
Petroleum Institute Certi®ed for
Gasoline Engines starburst symbol
of the proper viscosity. To determine
the preferred viscosity for your
vehicle's engine, see
Engine Oil on
page 5-15.
Engine Coolant50/50 mixture of clean, drinkable
water and use only
DEX-COOL
žCoolant. SeeEngine
Coolant on page 5-24.
Hydraulic Brake
SystemDelco Supreme 11 Brake Fluid or
equivalent DOT-3 brake ¯uid.
Windshield
Washer SolventGM Optikleen
žWasher Solvent or
equivalent.
Usage Fluid/Lubricant
Power Steering
SystemGM Power Steering Fluid (GM Part
No. U.S. 1052884, in Canada
993294, or equivalent).
Automatic
TransmissionDEXRON
ž-III Automatic
Transmission Fluid.
Key Lock
CylindersMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241, in
Canada 10953474, or equivalent).
Chassis
LubricationChassis Lubricant (GM Part No.
U.S. 12377985, in Canada
88901242, or equivalent) or lubricant
meeting requirements of NLGI #2,
Category LB or GC-LB.
Front AxleSAE 80W-90 Axle Lubricant (GM
Part No. U.S. 1052271, in Canada
10950849 or equivalent).
Rear AxleSAE 75W-90 Synthetic Axle
Lubricant (GM Part No. U.S.
12378261, in Canada 10953455) or
equivalent meeting GM Speci®cation
9986115.
6-17

Usage Fluid/Lubricant
Rear Axle
(Steerable)Synthetic Axle Lubricant; use only
GM Part No. 12378557 (in Canada
88901362). Do not add friction
modi®er.
Automatic
Transfer CaseAUTO-TRAK II Fluid (GM Part No.
U.S. 12378508, in Canada
10953626).
Front Axle
Propshaft
Spline or
One-Piece
Propshaft
Spline
(Two-Wheel
Drive with Auto.
Trans.)Spline Lubricant, Special Lubricant
(GM Part No. U.S. 12345879, in
Canada 10953511) or lubricant
meeting requirements of GM
9985830.Usage Fluid/Lubricant
Hood HingesMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241, in
Canada 10953474, or equivalent).
Outer Tailgate
Handle Pivot
PointsMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241, in
Canada 10953474, or equivalent).
Weatherstrip
ConditioningDielectric Silicone Grease (GM Part
No. U.S. 12345579, in Canada
10953014, or equivalent).
Weatherstrip
SqueaksSynthetic Grease with Te¯on,
Superlube (GM Part No. U.S.
12371287, in Canada 10953437, or
equivalent).
6-18

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 ªOwner Checks and Servicesº or ªPeriodic Maintenanceº on the following record
pages. Also, you should retain all maintenance receipts.
Maintenance Record
DateOdometer
ReadingServiced ByMaintenance Record
6-19

Maintenance Record (cont'd)
DateOdometer
ReadingServiced ByMaintenance Record
6-20

Maintenance Record (cont'd)
DateOdometer
ReadingServiced ByMaintenance Record
6-21

Maintenance Record (cont'd)
DateOdometer
ReadingServiced ByMaintenance Record
6-22

Customer Assistance Information......................7-2
Customer Satisfaction Procedure......................7-2
Online Owner Center......................................7-4
Customer Assistance for Text Telephone
(TTY) Users...............................................7-4
Customer Assistance Offices............................7-4
GM Mobility Program for Persons with
Disabilities..................................................7-5
Roadside Assistance Program..........................7-6
Courtesy Transportation...................................7-7Reporting Safety Defects................................7-10
Reporting Safety Defects to the United States
Government..............................................7-10
Reporting Safety Defects to the Canadian
Government..............................................7-10
Reporting Safety Defects to General Motors.....7-11
Service Publications Ordering Information.........7-11
Section 7 Customer Assistance Information
7-1