Page 427 of 472

Additional Required Services (cont’d)
Service and Miles (Kilometers)25,000
(40 000)50,000
(80 000)75,000
(120 000)100,000
(160 000)125,000
(200 000)150,000
(240 000)
V8 engine only: Inspect spark plug
wires.An Emission Control Service.•
Engine cooling system service
(or every ve years, whichever occurs
rst).An Emission Control Service.
See footnote (i).•
Inspect engine accessory drive belt.
An Emission Control Service.
See footnote (l).•
Maintenance Footnotes
(a)Visually 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.
(b)Visually inspect front and rear suspension and
steering system for damaged, loose, or missing parts or
signs of wear. Inspect power steering lines and hoses
for proper hook-up, binding, leaks, cracks, chafing, etc.(c)Visually inspect hoses and have them replaced if
they are cracked, swollen, or deteriorated. Inspect all
pipes, fittings and clamps; replace with genuine parts as
needed. To help ensure proper operation, a pressure
test of the cooling system and pressure cap and
cleaning the outside of the radiator and air conditioning
condenser is recommended at least once a year.
(d)Inspect wiper blades for wear, cracking, or
contamination. Clean the windshield and wiper blades,
if contaminated. Replace wiper blades that are worn
or damaged. See Windshield Wiper Blade Replacement
on page 5-55 and Windshield, Backglass, and Wiper
Blades on page 5-105 for more information.
6-7
Page 430 of 472

At Least Once a Year
Starter Switch Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough room
around the vehicle.
2. Firmly apply both the parking brake and the regular
brake. SeeParking Brake on page 2-32.
Do not use the accelerator pedal, and be ready to
turn off the engine immediately if it starts.
3. Try to start the engine in each gear. The vehicle
should start only in PARK (P) or NEUTRAL (N).
If the vehicle starts in any other position, contact
your dealer/retailer for service.
Automatic Transmission Shift Lock
Control System Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough room
around the vehicle. It should be parked on a level
surface.
2. Firmly apply the parking brake. SeeParking Brake
on page 2-32.
Be ready to apply the regular brake immediately if
the vehicle begins to move.
3. With the engine off, turn the ignition to ON/RUN,
but do not start the engine. Without applying the
regular brake, try to move the shift lever out
of PARK (P) with normal effort. If the shift lever
moves out of PARK (P), contact your dealer/retailer
for service.
6-10
Page 431 of 472

Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn
the ignition to LOCK/OFF in each shift lever position.
The ignition should turn to LOCK/OFF only
when the shift lever is in PARK (P).
The ignition key should come out only in
LOCK/OFF.
Contact your dealer/retailer if service is required.
Parking Brake and Automatic
Transmission Park (P) Mechanism Check
{CAUTION:
When you are doing this check, your vehicle
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 the 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.
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.
Contact your dealer/retailer if service is required.
Underbody Flushing Service
At least every spring, use plain water to ush any
corrosive materials from the underbody. Take care to
clean thoroughly any areas where mud and other
debris can collect.
6-11
Page 433 of 472

Usage Fluid/Lubricant
Windshield
WasherOptikleen
®Washer Solvent.
Parking Brake
Cable GuidesChassis Lubricant
(GM Part No. U.S. 12377985,
in Canada 88901242) or lubricant
meeting requirements of NLGI #2,
Category LB or GC-LB.
Power Steering
SystemGM Power Steering Fluid
(GM Part No. U.S. 89021184,
in Canada 89021186).
Automatic
TransmissionDEXRON
®-VI Automatic
Transmission Fluid.
Key Lock
CylindersMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241,
in Canada 10953474).
Chassis
LubricationChassis Lubricant
(GM Part No. U.S. 12377985,
in Canada 88901242) or lubricant
meeting requirements of NLGI #2,
Category LB or GC-LB.
Usage Fluid/Lubricant
Front AxleSAE 75W-90 Synthetic
Axle Lubricant
(GM Part No. U.S. 89021677,
in Canada 89021678) meeting
GM Speci cation 9986115.
Rear Axle
(Except
SS Model)SAE 75W-90 Synthetic
Axle Lubricant
(GM Part No. U.S. 89021677,
in Canada 89021678) meeting
GM Speci cation 9986115.
Rear Axle
(SS Model)SAE 75W-90 Synthetic
Axle Lubricant
(GM Part No. U.S. 89021677,
in Canada 89021678) meeting
GM Speci cation 9986115.
With a complete drain and re ll
add 5.5 ounces (163 ml) of
Limited-Slip Axle Lubricant Additive
(GM Part No. U.S. 1052358,
in Canada 992694) where required.
SeeRear Axle on page 5-49.
6-13
Page 467 of 472

O
Odometer......................................................3-32
Odometer, Trip...............................................3-32
Off-Road Driving.............................................4-14
Off-Road Recovery..........................................4-12
Oil
Change Engine Oil Light...............................3-45
Engine.......................................................5-17
Pressure Gage............................................3-44
Oil, Engine Oil Life System..............................5-22
Older Children, Restraints................................1-30
Online Owner Center........................................ 7-4
OnStar, Privacy..............................................7-18
OnStar
®System, see OnStar®Manual...............2-47
Operation, Universal Home Remote System........2-51
Other Warning Devices...................................... 3-6
Outlet Adjustment............................................3-28
Outlets
Accessory Power.........................................3-20
Outside
Convex Mirror.............................................2-46
Curb View Assist Mirror................................2-46
Heated Mirrors............................................2-46
Manual Mirrors............................................2-45
Power Mirrors.............................................2-45
Overhead Console..........................................2-55
Owner Checks and Services.............................. 6-9
Owners, Canadian............................................... ii
PPaint, Damage..............................................5-107
Park Brake....................................................2-32
Park (P)
Shifting Into................................................2-33
Shifting Out of............................................2-35
Parking
Over Things That Burn.................................2-35
Passenger Airbag Status Indicator.....................3-35
Passenger Sensing System..............................1-60
Passing.........................................................4-12
PASS-KEY
®III+ Electronic Immobilizer...............2-17
PASS-Key®III+ Electronic Immobilizer
Operation...................................................2-17
Passlock
®......................................................2-16
Perchlorate Materials Requirements, California...... 5-4
Power
Door Locks.................................................. 2-7
Electrical System.......................................5-110
Lumbar Controls........................................... 1-3
Reduced Engine Light..................................3-46
Retained Accessory (RAP)............................2-21
Seat............................................................ 1-3
Steering Fluid.............................................5-38
Windows....................................................2-13
Privacy..........................................................7-17
Event Data Recorders..................................7-17
Navigation System.......................................7-18
OnStar.......................................................7-18
Radio Frequency Identi cation.......................7-18
Programmable Automatic Door Locks.................. 2-8
9