
014
020
03
09
0 l5
0.
04
0
0
l6
0 22
Fuse Usage
1
2
Stop/TCC Switch, Buzzer, CHMSL, Hazard
Lamps, Stoplamps
Transfer Case
3 Courtesy Lamps, Cargo Lamp, Glove
Box
Lamp, Dome/Reading Lamps, Vanity Mirrors,
Power Mirrors
Fuse
4
10
11
12
13
14
Usage
Instrument Cluster, DRL Relay, Lamp
Switch, Keyless
Entry, Low Coolant
Module, Illuminated Entry Module, DRAC
(Diesel Engine)
Not Used
Cruise Control
Auxiliary Power Outlet
Air Bag System
License Lamp, Parking Lamps, Taillamps, Roof Marker Lamps, Tailgate Lamps, Front
Sidemarkers, Fog Lamp Relay, Door Switch
Illumination, Fender Lamps, Headlamp
Switch Illumination
Air Bag System
Wiper Motor, Washer Pump
A/C, A/C Blower, High Blower Relay
Power Amp, Cigarette Lighter, Door Lock
Relay, Power Lumbar Seat
'
4WD Indicator, Cluster, Comfort Controls,
Instrument Switches, Radio Illumination,
Chime Module
6-70
ProCarManuals.com

Fuse Usage
15 DRL Relay, Fog Lamp Relay
Underhood Fusemelay Center
16
17
18
19
20
21
22
23 24 Front and Rear Turn
Signals, Back-up
Lamps, BTSI Solenoid
Radio (Ignition)
4WALNCM, ABS, Cruise Control
Radio (Battery)
PRNDL, Automatic Transmission,
Speedometer, Check Gages Warning Light
Not Used
Not Used
Not Used
Front Axle, 4WD Indicator Lamp, TP2 Relay
(Gasoline Engine)
A Power Door Lock, Six-Way Power Seat,
Keyless Entry Module
B Power Windows The underhood
fusehelay center is located in the rear
of
the engine compartment near the brake fluid reservoir.
Move the retainer clips for the cover to access the fuse
block.
You can remove fuses with a fuse extractor. The fuse
extractor
is mounted to the interior fuse block. To
remove fuses if
you don’t have a fuse extractor, hold the
end of the fuse between your thumb and index finger
and
pull straight out.
6-71
ProCarManuals.com

Automatic Transmission Check
Restraint System Check
Make sure the safety belt reminder light and all your
belts, buckles, latch plates, retractors and anchorages 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.)
Air Cleaner Filter Restriction Indicator Check
Your vehicle has an indicator on the engine that lets you
know when the air cleaner filter is dirty and needs to be
changed. Check indicator at least twice
a year or when
your
oil is changed. See “Air Cleaner” in the Index for
more information.
Manual Transmission Check
Check the transmission fluid level; add if needed. See
“Manual Transmission” in
the Index. A fluid loss may
indicate
a problem. Check the system and repair if needed. 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.
Hydraulic Clutch System Check
Check the fluid level in the clutch reservoir. See
“Hydraulic Clutch Fluid”
in the Index. A fluid loss in
this system could indicate a problem. Have the system
inspected and repaired
at once.
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 all fuel doors, body hood and body door
hinges, tailgate and tailgate handle pivot points, latches,
locks and folding seat hardware. Part
D tells you what to
use. More frequent lubrication may be required when
exposed to a corrosive environment.
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.
2.
3.
Before you start, be sure you have enough room
around the vehicle.
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.
On automatic transmission vehicles, try
to start the
engine in each gear. The starter should work only in
PARK (P) or NEUTRAL (N). If the starter works in
any other position, your vehicle needs service.
On manual transmission vehicles, put the shift lever
in NEUTRAL (N), push.the clutch down halfway
and
try to start the engine. The starter should work
only when the clutch is pushed down
all the way to
the floor.
If the starter works when the clutch isn’t
pushed all the way down, your vehicle needs service.
Brake-Transmission Shift Interlock (BTSI)
Check (Automatic Transmission)
I A CAUTION:
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.
7-44
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.
With an automatic transmission, the key should turn
With a manual transmission, the key should turn
to LOCK only when the shift lever is in PARK (P).
to LOCK only when the shift lever is in
REVERSE
(R).
On vehicles with a key release button, try to turn the key
to LOCK without pressing the button. The key should
turn to LOCK
only when you press the key button.
On all vehicles, the key should come out
only in LOCK. Parking Brake and Automatic Transmission
PARK
(P) Mechanism Check
I 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.
0 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.
7-45
--- -
ProCarManuals.com

USAGE
Manual
Transmission (5-Speed
with
Low Gear, RPO
MW3)
Manual
Transmission
(5-Speed without
Low Gear, RPO
MG5)
Automatic
Transmission
Key Lock
Cylinders
Floor Shift
Linkage
FLUID/LUIBRICANT
GM Goodwrench Synthetic
Manual Transmission Gear Oil
(GM Part No. 12346 190
- 1 qt.),
Castrol Syntorq@
LT or equivalent
SAE 75W-90 GL-4 gear oil.
Synchromesh Transmission Fluid
(GM Part
No. 12345349 or
equivalent).
~~ ~~
DEXRON@-I11 Automatic
Transmission
Fluid.
Multi-Pu ose Lubricant,
Superlube
% (GM Part
No. 1234624
1 or equivalent),
Lubriplate Lubricant aerosol (GM
Part
No. 12346293 or equivalent)
or lubricant meeting requirements
of NLGI Grade 2 Category LB or
GC-LB.
I USAGE
Chassis
Lubrication
Front Wheel
Bearings
Differential,
Front and Rear
Axle
I
Differential, C3
(3500 HD)
Trucks With
Dana Rear Axle
I Transfer Case
FLUID/LUBRICANT
Chassis lubricant (GM Part
No. 1052497 or equivalent) or
lubricant meeting requirements of
NLGI Grade
2, Category LB or
Wheel bearing lubricant meeting
requirements of NLGI Grade 2,
Category GC or GC-LB (GM Part
No. 105 1344 or equivalent).
Axle Lubricant
(GM Part
No. 105227 1) or SAE 80W-90
GL-5 Gear Lubricant.
SAE 75W-
I40 Synthetic Gear
Lubricant. GC-LB.
~~
DEXRON@-I11
Automatic
Transmission Fluid.
~~ ~ ~ -~ -
7-49
ProCarManuals.com

Roadside Assistance
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:
Flat Tire Chulzge: Installation of spare tire will be
covered at no charge (customer is responsible for repair
or replacement
of tire).
Fuel Deliwry: Delivery of enough fuel for the customer
to get to the nearest service station (up to $4.00) will
be covered.
Junzp Stnrt: 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).
Elnergemy Towing Service: Towing to the nearest
GMC Truck dealer for warranty related disablements
will
be covered.
nip Rouring: Availability of customized trip routings
through
GMC Truck Roadside Assistance. This deluxe
computerized trip routing service
will provide highlighted
map routing, scenic or fastest route,
a listing of GMC
Truck dealers along the way, and a variety of other travel
related services.
fiip hzterruptiorz: GMC Truck Roadside Assistance will
provide reimbursement for reasonable trip interruption
expenses such as meals and lodging (up to
$500) directly
associated with
a warranty-related disablement which
requires overnight accommodations.
ProCarManuals.com

Section 9 Index
I
Accessory Power Outlet ......................... 2-53
AirBag
....................................... 1-21
Adding Equipment
............................ 1 -26
How Does it Restrain .......................... 1-24
How
it Works ................................ 1-23
Location
.................................... 1-23
Readiness Light
......................... 1-22, 2-59
Servicing ................................... 1-26
What Makes
it Inflate .......................... 1-24
What Will
You See After it Inflates ............... 1-24
When Should
it Inflate ......................... 1-23
Aircleaner
.................................... 6-16
Air Cleaner Filter Restriction Indicator Check
........ 7-43
Air Conditioning
................................ 3-3
Air Conditioning Refrigerants
..................... 6-76
Alignment and Balance, Tire
...................... 6-55
Aluminum Wheels, Cleaning
...................... 6-64
Antenna
...................................... 3-24
Antifreeze
..................................... 6-26
Anti-Lock
Brakes
...................................... 4-6
Brake System Warning Light
................ 2-62, 4-6
I
Appearance Care ............................... 6-58
Appearance Care Materials ....................... 6-66
Arbitration Program
.............................. 8-7
Armrest Storage Compartment
.................... 2-51
Ashtrays
...................................... 2-52
Audio Equipment. Adding
........................ 3-23
Audio Systems
.................................. 3-6
Automatic Transmission
......................... 2-11
Check
...................................... 7-43
Fluid
....................................... 6-19
Park Mechanism Check
........................ 7-45
Starting Your Engine
.......................... 2-11
Operation ................................... 2-13
Axle. Front .................................... 6-26
Axle. Locking Rear
............................. 2-21
Axle. Rear .................................... 6-24
Battery
...................................... 6-37
Jump Starting
................................. 5-2
Replacement. Keyless Entry
..................... 2-6
Warnings
................................ 5-2. 5-4
BBB Auto Line
................................. 8-7
Better Business Bureau Mediation ................... 8-7
9-1
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