Page 223 of 404

12. Remove the cables in reverse order to prevent
electrical shorting. Take care that they don’t touch
each other or any other metal.
I
A. Heavy Metal Engine Part
B. Good Battery
C. Dead Battery
Towing Your Vehicle
Try to have your GM dealer or a professional towing
service tow your vehicle. See “Roadside Assistance”
in the Index.
If your vehicle has been changed since it was
factory-new, by adding such things as fog lamps,
aero skirting, or special tires and wheels, these’
instructions may not be correct.
Before you do anything, turn on the hazard
warning flashers.
When you call, tell the towing service:
That your vehicle .has rear-wheel drive, or that it has
The make, model and year of your vehicle.
Whether you can move the shift lever for the
If there was an accident, what was damaged.
When the towing service arrives, let the tow operator
know that this manual contains detailed towing
instructions and illustrations. The operator may want to
see them.
the four-wheel-drive
option.
transmission
and transfer case, if you have one.
5-7
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A. Battery
B. Air Cleaner
C. Radiator Cap
D. Coolant Recovery Tmk
E. Air Filter Restriction Indicator
E Engine Oil Dipstick
G. Automatic Transmission Dipstick
H. Fan
I. Power Steering Fluid Reservoir
J. Engine Oil Fill
K. Brake Fluid Reservoir
L. Windshield Washer Fluid Reservoir
M. FuseIRelay Center
N. Storage Compartment
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“VORTEC” 7400 Engine
I
A. Battery
B. Coolant Recovery Tank
C. Air Cleaner
D. Radiator Cap
E. Air Filter Restriction Indicator
E Engine Oil Dipstick K. Brake Fluid Reservoir
G. Automatic Transmission Dipstick L. Storage Compartment
H. Engine Oil Fill M. Windshield Washer
I. Fan Fluid
Reservoir
J. Power Steering Fluid Reservoir Ne Fuse/RelaY Center
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What to Do with Used Oil
Did you know that used engine oil contains certain
elements that
may be unhealthy for your skin and could
even cause cancer? Don’t let used
oil stay on your skin
for very long. Clean your skin and nails with soap and
water, or
a good hand cleaner. Wash or properly throw
away clothing or rags containing used engine oil. (See
the manufacturer’s warnings about the use and disposal
of oil products.)
Used
oil can be a real threat to the environment. If you
change your own
oil, be sure to drain all free-flowing oil
from the filter before disposal. Don’t ever dispose
of oil
by putting it in the trash, pouring it on the ground, into
sewers,
or into streams or bodies of water. Instead,
recycle
it by taking it to a place that collects used oil. If
you have a problem properly disposing of your used oil,
ask your dealer, a service station or a local recycling
center for
help.
Air Cleaner
Your air cleaner is located between the battery and
coolant recovery tank.
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Battery
Every new vehicle has 21 Delco Freedom@ battery. You
never have
to add water to one of these. When it’s time
for a new battery, we recommend a Delco Freedom
battery. Get one that has the replacement number shown
on the original battery’s label.
Vehicle Storage
If you’re not going to drive your vehicle for 25 days
or more, take
off the black, negative (-) cable from
the battery. This
will help keep your battery from
runnine down.
I A CAUTION:
Contact your dealer to learn how to prepare your vehicle
for longer storage periods.
Also, for your audio system, see ”Theft-De-terrent
Feature”
in the Index.
Bulb Replacement
Before you replace any bulbs, be sure that all the lamps
are
off and the engine isn’t running. See “Replacement
Bulbs”
in the Index for the proper types of bulbs to use.
Halogen Bulbs
Batteries have acid that can burn you and gas
that can explode. You can be badly hurt if you
aren’t careful. See “Jump Starting” in the Index
for tips on working around a battery without getting hurt.
-A i
F-
Halogen bulbs have prc-arized gas inside and
can burst
if you drop or scratch the bulb. You or
others could be injured. Be sure to read and
follow the instructions on the bulb package.
6-37
- .-
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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
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Fuse
ECM-B
Usage
Fuel Pump, PCM/VCM
RR DEFOG Rear Window Defogger
IGN-E Auxiliary Fan Relay Coil, A/C
Compressor Relay, Hot Fuel Module,
Dual Tanks
FUEL SOL Fuel Solenoid (Diesel Engine)
Fuse
GLOW
PLUG
HORN
AUX FAN
ECM-
1
A/C
ENG-
1
Usage
Glow plugs (Diesel Engine)
Horn, Underhood Lamps Auxiliary Fan
Injectors, PCM/VCM
Air Conditioning
Ignition Switch, EGR, Canister Purge,
EVRV Idle Coast Solenoid, Heated
02,
Fuel Heater (Diesel Engine), Water
Sensor (Diesel Engine)
LIGHTING Headlamp and Panel Dimmer Switch,
Fog and Courtesy Fuses
Battery,
Fuse Block Busbar
BATT
IGN-A
IGN-B
ABS Ignition Switch
Ignition Switch
Anti-Lock Brake Module
BLOWER
Hi Blower Relay
STOP/HAZ Stoplamps
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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.
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