
POSITION
16.
17.
18.
19.
20.
21.
22.
23.
24.
A.?
B.?
NAME
TURN B/U
RADIO-
1
BRAKE
RADIO-B
TRANS
RR FOG
Not Used
Not Used
RR HVAC
PWR ACCY
PWR WDO
CIRCUITS PROTECTED
Front Turn, RR Turn, Back-up Lamps, BTSI Solenoid
Radio
(Ign, Accy)
4WAL PCM, ABS, Cruise Control
Radio (Battery), Power Antenna
PRNDL, Automatic Transmission
Rear Window Defog
RR HVAC Controls,
HIGH, MED, LOW Relays
Power Door Lock, Six-Way Power Seat, Keyless Entry
Illumination Module
Power Windows
?Circuit Breaker Do not
use fuses of higher amperage than those recommended above. Fuse amperage levels are also imprinted on the
fuse panel under the dash.
6-64
ProCarManuals.com

At Least Once a Month Automatic Transmission Check
Tire Inflation Check
Make sure tires are inflated to the correct pressures. See
“Tires”
in the Index for further details.
Cassettt -1eck Service
Clean cassette deck. Cleaning should be done every
50 hours of tape play. See “Audio Systems” in the
Index for further details.
At Least Twice a Year
Restraint System Check
Make sure the safety belt reminder light and all bur
belts, buckles, latch plates, retractorshnd anchoiages are
working properly.
Look for any other loose or damaged
safety belt system parts. If you see anything that might
keep
a safety belt system from doing its job, have it
repaired. Have any torn or frayed safety belts replaced.
Also look for any opened or broken air bag covers, and
have them repaired or replaced. (The air
bag system
does
not need regular maintenance.) Check
the transmission fluid level; add if needed. See
“Automatic Transmission“
in the Index. A fluid loss
may indicate a problem. Check the system and repair
if needed.
At Least Once a Year
Key Lock Cylinders Service
Lubricate the key lock cylinders with the lubricant
specified
in Part D.
Body Lubrication Service
Lubricate ail hood hinges, hood prop rod pivot, fuel
filler door, rear compartment hinges, latches,
locks and
any moving seat hardware. Door hinges are lubricated
for the
life of your vehicle; no additional lubrication is
required. Part D tells you what to use. More frequent
lubrication may be required when exposed to a
corrosive environment.
7-44
ProCarManuals.com

Starter Switch Check
When
you are doing this check, the vehicle could
move suddenly.
If it does, you or others could be
injured. Follow the steps below.
1. Before you start, be sure you have enough room
around the vehicle.
2. Firmly apply both the parking brake (see “Parking
Brake”
in the Index if necessary) and the
regular brake.
NOTE:
Do not use the accelerator pedal, and be
ready to
turn off the engine immediately if it starts.
should work only
in PARK (P) or NEUTRAL (N). If
the starter works in any other position, your vehicle
needs service.
3. Try to start the engine in each gear. The starter
Brake-Transmission Shift Interlock (BTSI) Check
When you are doing this check, the vehicle could
move suddenly.
If it does, you or others could be
injured. Follow the steps below.
1.
2.
3.
Before you start, be sure you have enough room
around the vehicle.
It should be parked on a
level surface.
Firmly apply the parking brake (see ”Parking Brake’‘
in the Index if necessary).
NOTE: Be ready to apply the regular brake
immediately
if the vehicle begins to move.
With the engine
off, turn the key to the RUN
position, but don’t 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), your vehicle’s BTSI
needs service.
7-45
ProCarManuals.com

Steering Column Lock Check
While parked, and with the parking brake set, try to turn
the key
to LOCK in each shift lever position.
The key should turn to LOCK only when the shift
lever is
in PARK (P).
The key should come out only in LOCK.
Parking Brake and Automatic Transmission
PARK
(P) Mechanism Check
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: 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.
To check the PARK (P) mechanism’s holding ability:
With the engine running, shift
to PARK (P). Then
release all brakes.
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.
~
7-46
ProCarManuals.com

Part D: Recommended Fluids and
Lubricants
NOTE: Fluids and lubricants identified below by name,
part number or specification may be obtained from your
GM dealer.
USAGE
Engine Oil
(Gasoline
Engine)
Engine Coolant
Coolant
Supplement
Sealer
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”
in the Index.
50150 mixture of clean water
(preferably distilled) and GM
Goodwrench@ DEX-COOL
TM or
Havo line@
DEX-COOL TM
(orange-colored, silicate-free)
antifreeze conforming to GM
Specification 6277M. See “Engine
Coolant”
in the Index.
GM Part No. 3634621 or
equivalent with
a complete flush
and refill.
USAGE
Hydraulic Brake
System
Parking Brake
Cable Guides
~~
Power Steering
System
Automatic
Transmission
Key Lock
Cylinders
Chassis
Lubrication
FLUIDLUBRICANT
Delco Supreme 1 1 @ Brake Fluid
(GM Part No. 1052535 or
equivalent DOT-3 brake fluid).
Chassis lubricant (GM Part
No. 1052497 or equivalent) or
lubricant meeting requirements
of NLGI Grade 2, Category LB
or GC-LB.
GM Power Steering Fluid
(GM Part
No. 1052884 - 1 pt.,
1050017
- 1 qt., or equivalent).
DEXRON@-111 Automatic
Transmission
Fluid.
Multi-Purpose Lubricant, Superlube@
(GM
Pd-t No. 1234624 1
or equivalent).
Chassis lubricant
(GM Part
No. 1052497 or equivalent) or
lubricant meeting requirements
of NLGI Grade 2, Category
LB
or GC-LB.
7-49
ProCarManuals.com

Roadside Assistance
n
Flat Tire Cl~~lngu: Installation of spare tire will be
covered at no charge (customer is responsible for repair
or replacement of tire).
Fuel Dcli\!ery: Delivery of enough fuel for the customer
to get to the nearest service station (up to
$4.00) will
be covered.
JLIIIZ~ Smt: No-start situations which require a battery
jump start
will be covered at no charge.
Lock Out: Replacement keys or locksmith service will
be covered at no charge if you are unable to gain entry
into your vehicle. Delivery of the replacement key
will
be covered at no charge within 10 miles (16 km).
Emergc~17cy 7bkr;ing Ser-vic~: Towing to the nearest
GMC Truck dealer for warranty related disablements
will be covered.
GMC Truck’s Roadside Assistance provides stranded
owners with over-the-phone roadside repairs, location
of the nearest GMC Truck dealer or the following
special services:
8-4
ProCarManuals.com

Section 9 Index
Adjustable Mast Antenna ........................ 3-29
AirBag ....................................... 1-21
Adding Equipment ............................ 1-28
How Does it Restrain .......................... 1-26
How it Works ................................. 1-24
Location
.................................... 1-24
Readiness Light
......................... 1.23. 2.47
Servicing
................................... 1-27
What Makes
it Inflate .......................... 1-25
What Will You See After
it Inflates ............... 1-26
When Should
it Inflate ......................... 1-25
Aircleaner
.................................... 6-15
Air Conditioning
................................ 3-7
Air Conditioning Refrigerants
..................... 6-68
Air Control. Climate Control System
................. 3-3
Alignment and Balance
. Tire ...................... 6-48
Aluminum Wheels. Cleaning
...................... 6-57
Antenna. Adjustable
Mast ........................ 3-29
Antenna. Power
................................ 3-29
Antifreeze
..................................... 6-20
Anti-Lock
Brake System Warning Light
................ 2-49. 4-6
Brakes ...................................... 4-5
Appearancecare
............................... 6-50
Appearance Case Materials ....................... 6-59
Arbitration Program
.............................. 8-7
Ashtsays
...................................... 2-42
Audio Systems
.................................. 3-9
Transmission
Transmission Check
........................... 7-44
Transmission Fluid
............................ 6-16
Transmission Operation
........................ 2-17
Shiftin
...................................... 2-17
Transmission Park Mechanism Check
............. 7-46
Axle, Locking Rear
............................. 2-20
Axle, Rear .................................... 6-19
Battery
...................................... 6-30
Jump Starting ................................. 5-2
Replacement
. Remote Keyless Entry ............... 2-6
Warnings
................................ 5-2.5-3
BBB Auto Line
................................. 8-7
Bethre Leaving on a Long Trip .................... 4-20
Better Business Bureau Mediation
................... 8-7
9-1
ProCarManuals.com

Hearing Impaired. Customer Assistance .............. 8-3
Heating ........................................ 3-7
High-Beam Headlamps
.......................... 2-30
Highway Hypnosis
.............................. 4-2 1
Hill and Mountain Roads ......................... 4-21
Hitches. Trailer
................................. 4-32
Hood
Checking Things Under
......................... 6-6
Prop
........................................ 6-7
Release
...................................... 6-6
Hydroplaning
.................................. 4- 17
Horn
......................................... 2-28
Ignition Switch
................................ 2- I3
Inflation. Tire
.................................. 6-42
Inside Day/Night Rearview Mirror
................. 2-39
Brakesystem
................................ 7-48
Exhaust Systems ............................. 7-47
Radiator and Heater
Hose ...................... 7-47
RearAxle
................................... 7-48
Steering
.................................... 7-47
Suspension
.................................. 7-47
Throttle Linkage
.............................. 7-47
Brightness Control
............................ 2-36
Cleaning
.................................... 6-51
Cluster ..................................... 2-44
FuseBlock
.................................. 6-62
Interior Lamps
................................. 2-38
Inspections
.................................... 7-47
.................................... J ack.Tire
5-22
Jump Starting ................................... 5-2
Key Lock Cylinders Service ..................... 7-44
Keyless Entry System
............................ 2-5
Keys .......................................... 2-1
Labels
Certification ................................. 4-26
CeriificatiodTire
............................. 4-26
Service Parts Identification
..................... 6-60
Tire-Loading
. Information ...................... 4-26
Vehicle Identification Number
................... 6-60
Lamps ........................................ 2-35
Dome ...................................... 2-37
Interior
..................................... 2-37
On Reminder
................................ 2-36 .
On Warning ................................. 2-36
Panel
....................................... 2-35
Underhood
.................................. 2-38
Leaving
Your Vehicle with the Engine Running ....... 2-23
Lighter
....................................... 2-42
Lights
............................................
Air Bag Readiness ....................... 1-23.2-47
Anti-Lock Brake System Warning
............ 2.49, 4.6
Brake System Warning ......................... 2-48
Daytime Running Lamps Indicator
............... 2-49
Interior
..................................... 2-37
Safety Belt Reminder
...................... 1.8. 2.46
Service Engine
Soon .......................... 2-50
Loading Your Vehicle ........................... 4-26
9-5
ProCarManuals.com