Page 301 of 380

Downloaded from www.Manualslib.com manuals search engine Headlamps
The headlamp wiring is protected by a circuit breaker in the light switch. An
electrical overload will cause the lights to go on and off, or in some cases to
remain
off. If this happens, have your headlamp wiring checked right away.
Windshield Wipers
The windshield wiper motor is protected by a circuit breaker and a fuse. If
the motor overheats due to heavy snow, etc., the wiper will stop until the
motor cools. If the overload is caused by some electrical problem and not
snow, etc., be sure to get it fixed.
Power Windows and Other Power Options
Circuit breakers in the fuse panel protect the power windows and other
power accessories. When the current load is too heavy, the cir\
cuit breaker
opens and closes, protecting the circuit until the problem is fixed.
Trailer Wiring Harness
The optional seven-wire trailer wiring harness is protected by an in-line
fuse in the battery feed wire. This fuse is near the junction block in the
front, driver’s side fender. See “Trailer Wiring Harness” in the
Features &
Controls section.
Fuse B/ock
The fuse block is in
the instrument panel
on the driver’s side.
Remove the cover by
turning the fastener
counterclockwise.
Then you can remove
fuses with a fuse
extractor. Extra fuses
are provided in the
cover.
6-61
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Downloaded from www.Manualslib.com manuals search engine Be sure to use the
correct fuse.
Spare fuses are provided, however if you ever have a problem on the road
and don’t have a spare fuse, you can “borrow” one of the correct value. Just
pick some feature
of your vehicle that you can get along without-like the
radio
or cigarette lighter-and use its fuse, if it is of the value you need.
Replace it as soon
as you can. See “Fuses and Circuit Breakers” in this
section.
To reinstall the fuse panel cover, push in and turn the fastener clockwise.
Capacities and Specification Charts
Replacement Parts
Replacement part numbers listed in this section are based on the latest
information available at the time
of printing, and are subject to change. If a
part listed in this manual is not the same as the part used in your vehicle
when it was built, or if you have any questions, please contact your
GM
truck dealer.
Engine Identification
Engine Description
Type
VIN Code
Fuel System
Produced By
Emissions
4.3L
V6
W
CPI* *
us.
L.D.
**Central Port Fuel Injection
6-62
Page 305 of 380
Downloaded from www.Manualslib.com manuals search engine Instrument Cluster Lamps
NOTE: A PC part number indicates that the bulb and base are one
assembly and must be replaced as such.
Anti-lock Brake
Warning Indicator
Brake System Warning
Indicator
Check Gages Indicator
Daytime Running
Lamps Indicator
Charging System
Indicator
High Beam Indicator
Instrument Cluster
Illumination
Malfunction Indicator
Lamp (SERVICE
ENGINE
SOON)
Seat Belt Indicator
Turn Signal Indicator
Upshift Indicator
AIR BAG Indicator
1
1
1
1
1
1
6
1
1
2
1
1
PC74
PC74
PC74 PC74
PC74
PC74
PC168
PC74
PC 194
PC74 PC74
See
GM Dealer
6-65
Page 307 of 380
Downloaded from www.Manualslib.com manuals search engine NAME
PWR ACCY
PWR WDO
STOP HAZ
HORN DM
TIL CTSY
CIRCUITS PROTECTED
Power Door Locks, Power Seat, Power Seat Lumbar,
RKE
Power Windows
Stop Lamps, Hazard Lamps, Chime, CHMSL Relay,
CHMSL Lamp
Dome Lamps, Cargo Lamps, Visor Vanity Mirror,
Cigarette Lighter, Inside Rearview Mirror Lamp,
Overhead Console Lamps, Glove
Box Lamp, Horns,
Horn Relay, IP Courtesy Lamps, Power Outside
Rearview Mirror, Liftglass Release Motor, Illuminated
Entry Module
Park Lamps, License Plate Lamps, Electric Shift
Transfer Case Module, Under Hood Lamp, Rear Wiper,
Fog Lamp Relay, Door Switch Lamp
6-67
Page 309 of 380
Downloaded from www.Manualslib.com manuals search engine NAME
RADIO RDO BATT
ILLUM
DRL
TURN-B/U
CIRCUITS PROTECTED
Radio, Inside Rearview Mirror Map Lamp, Overhead
Console Reading Lamps, Rear Wiper, Rear Washer,
Overhead Console Display Clock, Radio Battery, CD Player
Cluster Illumination,
Ash Tray Lamp, Radio
Illumination, Heater Lamp, Four-wheel Drive
Illumination, Chime Module, Fog Lamp Illumination, Rear Wiper Switch, Rear Defog Switch Illumination,
Lift Glass Release Switch Illumination, Overhead Console Illumination
Daytime Running Lamps
Turn Signal and Back-up Lamps
6-69
Page 310 of 380
Downloaded from www.Manualslib.com manuals search engine NAME
WIPER
BRAKE
4WD
CRANK
FOG
AIR BAG
TRANS PRNDL
CIRCUITS PROTECTED
Windshield Washer, Windshield Wiper Motor
DRAC, Anti-Lock Braking
System, Cruise Control
Electric Shift Transfer Case
Crank Signal
Fog Lamp Relay, Fog Lamps
Air Bag Module
4L60E Automatic Transmission
PRNDL Power
Service Replacement Part and Filter
Recommendations
Engine (VIN)
Oil Filter
Air Cleaner Filter
PCV Valve Spark Plugs
Fuel Filter
Radiator Cap 4.3L(W)
PF52
A1163C
cv774c
.CR43TSM GF48 1
RC27
*Use copper-cored resistor type spark plugs.
6-70
Page 318 of 380

Downloaded from www.Manualslib.com manuals search engine I Maintenance Schedule I
The services shown in this schedule up to 100,000 miles (166 000 km)
should be performed after 100,000 miles (166 000 km) at the same intervals.
Footnotes
? The California Air Resources Board has determined that the failure to
perform this maintenance item will not nullify the emission warranty or
limit recall liability prior to the completion of vehicle useful life. We,
however, urge that all recommended maintenance services be performed at
the indicated intervals and the maintenance be recorded in “\
Section
E:
Maintenance Record.”
** Drive axle service:
0
0
0
Locking Differential - Drain fluid and refill at first engine oil change.
At subsequent oil changes, check fluid level and add fluid as needed.
If
driving in dusty areas or towing a trailer, drain fluid and refill every
15,000 miles (25
000 km).
Standard Differential
- Check fluid level and add fluid as needed at
every oil change. If driving in dusty areas or towing
a trailer, drain
fluid and refill
every 15,000 miles (25 000 km) .
More frequent lubrication may be required for heavy-duty or off-road
use.
3,000 Miles (5 000 km)
0
0
Change engine oil and filter (or every 3 months, whichever occurs
first).
An Emission Control Service.
Lubricate the front suspension, ball joints (ball joints should not be
lubricated unless their temperature is 10°F (-1 2°C) or higher. When
the weather is cold, let them warm up before lubricating them
or they
could be damaged.), steering linkage and transfer case shift linkage,
parking brake cable guides, propshaft splines, universal joints, brake
pedal springs, and clutch pedal springs at every
oil change (or every 6
months
, whichever occurs first).
Check readfront axle fluid level and add fluid as needed. Check
constant velocity joints and axle seals for leaking.
**
I DATE I ACTUALMILEAGE I SERVICED BY:
7-6
Page 338 of 380

Downloaded from www.Manualslib.com manuals search engine The services shown in this schedule up to 100,000 miles (166 000 km)
should be performed after 100,000 miles (166 000 km) at the same intervals.
Footnotes
t The California Air Resources Board has determined that the failure to
perform this maintenance item will not nullify the emission warranty or
limit recall liability prior to the completion of vehicle useful life. We,
however, urge that all recommended maintenance services be performed at
the indicated intervals and the maintenance be recorded
in “Section E:
Maintenance Record .”
** Drive axle service:
0 Locking Differential - Drain fluid and refill at first engine oil change.
At subsequent oil changes, check fluid level and add fluid as needed. If
driving in dusty areas or towing a trailer, drain fluid and refill every
15,000 miles (25 000 km).
0 Standard Differential - Check fluid level and add fluid as needed at
every engine oil change. If driving in dusty areas or towing a trailer,
drain fluid and refill every
15,000 miles (25 000 km).
0 More frequent lubrication may be required for heavy-duty or off-road
use.
7,500 Miles (12 500 km)
0 Change engine oil and filter (or every 12 months, whichever occurs
Lubricate the front suspension, ball joints (ball joints should not be
first).
An Emission
Control Service.
lubricated unless their temperature is 10°F (-12°C) or higher. When
the weather is cold, let them warm up before lubricating them or they
could be damaged.), steering linkage and transfer case shift linkage,
parking brake cable guides, propshaft splines, universal joints, brake
pedal springs, and clutch pedal springs at every oil change
(or every 12
months, whichever occurs first).
0 Check readfront axle fluid level and add fluid as needed. Check
constant velocity joints and axle seals for leaking,**
0 Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
rotation pattern and additional information.
DATE SERVICED BY ACTUAL MILEAGE
7-26