Page 333 of 486

Downloaded from www.Manualslib.com manuals search engine NOTICE:
Don’t let anyone tell you that underinflation or overinflation is
all right. It’s not.
If your tires don’t have enough air
(underinflation) you can get:
Too much flexing
0 Too much heat
Tire overloading
Bad wear
Bad handling
0 Bad fuel economy.
If your tires have too much air (overinflation), you can get:
Unusual wear
Bad handling
Rough ride
Needless damage from road hazards.
When to Check
Check your tires once a month or more. Also, check the tire pressure of the
spare tire.
How to Check
Use a good quality pocket-type gage to check tire pressure. Simply looking
at the tires will not tell you the pressure, especially if you have radial tires
- which may look properly inflated even if they’re underinflated.
If your tires have valve caps, be sure
to put them back on. They help prevent
leaks by keeping
out dirt and moisture.
Tire Inspection and Rotation
Tires should be inspected every 6,000 to 8,000 miles (10 000 to 13 000 km)
for any signs
of unusual wear. If unusual wear is present, rotate your tires as
soon as possible and check wheel alignment. Also check for damaged tires
or wheels. See “When it’s Time for New Tires’’ and “Wheel Replacement”
later
in this section for more information.
6-56
Page 335 of 486

Downloaded from www.Manualslib.com manuals search engine When it’s Time for New Tires
Tread Wear
Indicators
One way to tell when
it’s time for new tires
is to check the
treadwear indicators,
which will appear
when your tires have
only
1/16 inch (1.6
mm) or less of tread
remaining.
You need a new tire if
0 You can see the indicators at three or more places around the tire.
e You can see cord or fidbric showing through the tire’s rubber.
The tread or sidewall is cracked, cut or snagged deep enough to show
cord
or fabric.
0 The tire has a bump, bulge or split.
0 The tire has a puncture, cut, or other damage that can’t be repaired well
because of the size or location
of the damage.
Buying New Tires
To find out what kind and size of tires you need, look at the
Certification/Tire label.
The tires installed
on your vehicle when it was new had a Tire Performance
Criteria Specification (TPC Spec) number on each tire’s sidewall. When you
get new tires, get ones with that same TPC Spec number. That way, your
vehicle will
continue to have tires that are designed to give proper
endurance, handling, speed rating, traction, ride and other things during
normal service
on your vehicle. If your tires have an all-season tread
design, the TPC number
will be followed by an “MS” (for mud and snow).
If
you ever replace your tires with those not having a TPC Spec number,
make sure
they are the same size, load range, speed rating and construction
type (bias, bias-belted or radial)
as your original tires.
Page 344 of 486

Downloaded from www.Manualslib.com manuals search engine Glass
Glass should be cleaned often. GM Glass Cleaner (GM Part No. 1050427)
or a liquid household glass cleaner will remove normal tobacco smoke and
dust films.
Don’t use abrasive cleaners
on glass, because they may cause scratches.
Avoid placing decals on the inside rear window, since
they may have to be
scraped off later. If abrasive cleaners are used on
the inside of the rear
window, an electric defogger element may be damaged. Any temporary
license should not be attached across the defogger grid.
Cleaning the Outside of the Windshield,
Backglass and Wiper Blades
If the windshield is not clear after using the windshield washer, or if the
wiper blade chatters when running, wax or other material may be on the
blade
or windshield.
Clean the outside
of the windshield with GM Windshield Cleaner, Bon-Ami
Powder@
(GM Part No. 10500 I 1 ). The windshield is clean if beads do not
form when you rinse it with water.
Clean the blade by wiping vigorously with a cloth soaked
in full strength
windshield washer solvent. Then rinse the blade with water.
Wiper blades should be checked on a regular basis and replaced when worn.
Weatherstrips
Silicone grease on weatherstrips will make them last longer, seal better, and
not stick or squeak. Apply silicone grease with a clean cloth
at least every
six months. During very cold, damp weather more frequent application may
be required. (See “Recommended Fluids and Lubricants”
in the Index.)
Cleaning the Outside of Your Vehicle
The paint finish on your vehicle provides beauty, depth of color, gloss
retention and durability.
6-67
Page 352 of 486

Downloaded from www.Manualslib.com manuals search engine Fuses and Circuit Breakers
The wiring circuits in your vehicle are protected from short circuits by a
combination of fuses, circuit breakers, and fusible thermal links
in the
wiring itself. This greatly reduces the chance
of fires caused by electrical
problems. See “Fuses and Circuit Breakers”
in the Index for more
information.
Headlamps
The headlamp wiring is protected by a circuit breaker in the lamp switch.
An electrical overload will cause
the lamps to flicker 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. Although the circuit is protected from electrical overload,
overload due
to heavy snow, etc., may cause wiper linkage damage. Always
clear ice and heavy snow from the the windshield before using the
windshield wipers. 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 circuit breaker
opens and closes. This protects the circuit
until the current load returns to
normal
or the problem is fixed.
Trailer Wiring Harness
The seven-wire trailer wiring harness is protected by an in-line fuse in the
battery feed wire. This fuse is near the junction block. See “Trailer Wiring
Harness”
in the Index for more information.
6-75
Page 354 of 486
Downloaded from www.Manualslib.com manuals search engine Engine Identification - Diesel Engines
Engine Type
VTN Code
Fuel System
Wheel Nut Torque
MODEL
C 1500
K 1500, C-K 2500
C-K 2500
6.5L
V8
S
Turbo Diesel
DESCRIPTION
5 bolts (14mm)
6 bolts
(1 4mm)
8 bolts ( 14mm)
Cooling System Capacity
ENGINE
5.7L
6.5L
6.5L 7.4L
VIN
K
S
F
N
6.5L
V8
F
Turbo Diesel
TORQUE
120 ft. Ibs. ( 160 N*m)
120 ft. Ibs. (1 60 Nom)
I20
ft. lbs. ( 160 Nom)
QTY Without
Rear Heater*
1 7.5 Quarts
( 16.5 Liters)
23.5 Quarts (22.2 Liters)
23.5 Quarts
(22.2 Liters)
25 Quarts
(23.5
Liters)
QTY With
Rear Heater4’
20 Quarts (1 9
Liters)
27.5 Quarts (26
Liters)
27.5 Quarts (26
Liters)
27.5 Quarts (26
Li ters)
After refill. the level MUST be checked
as outlined under “Engine Cooling
System” in Section 5.
‘$All quantities are approximate.
6-77
Page 355 of 486
Downloaded from www.Manualslib.com manuals search engine Crankcase Capacity
ENGINE
5.7L
6.5L
6.5L
7.4L
VIN
K
S
F
N
QUANTITY WITH
FILTER?
5 Quarts (4.8 Liters)
7 Quarts (6.5 Liters)
7 Quarts (6.5 Liters)
7 Quarts (6.5 Liters)
After refill, the level
MUST be checked as outlined under “Engine Oil And
Filter Recommendations”
in Section 5.
All quantities are approximate.
?Oil filter should be changed at EVERY oil change.
Fuel Tank Capacity
TYPE
Gasoline/Diesel
Utility Models - Standard
Suburban
- Standard
QUANTITY
30 Gallons ( I 1 3 Liters)
42 Gallons
( I59 Liters)
All quantities are for a completely dry tank and are approximate.
Service Replacement Part and Filter
Recommendations
- Gasoline Engines
Engine
VIN
Oil Filter
Air Cleaner Filter
PCV Valve
Spark Plugs”
Fuel Filter
Radiator Cap
5.7L
K
PF1218T A348C
cv774c
CR43TS
GF48 1
RC36
?Four Wheel Drive Vehicle
- use a PF52 oil filter
*Use AC copper-cored resistor type spark plugs
7.4L
N
PF1218
A348C
cv774c
.CR43TS GF48
1
RC36
Page 358 of 486

Downloaded from www.Manualslib.com manuals search engine Fuses and Circuit Breakers
POSITION
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13. 14.
15.
16.
17.
18.
19.
20.
21.
22.
NAME
STOP/HAZ
T CASE
CTSY
GAGES
RR WAC
CRUISE
AUX PWR CRANK
PARK LPS
AIR BAG
WIPER
HTR-A/C
CIG LTR
ILLUM
DRL-FOG
TURN-B/U
RADIO
BRAKE
RADIO
BATT
TRANS
CIRCUITS PROTECTED
Stop/TCC Switch, Buzzer, CHMSL, Hazard
Lamps, Stop Lamps
Transfer Case
Courtesy Lamps, Cargo Lamp, Glove Box
Light, Dome/RDG Lamps, Vanity Mirrors,
Pwr Mirrors
IP Cluster, DRL Relay, HDLP Switch,
Keyless Entry, Low Coolant Module
RR HVAC Controls
Cruise Control
Aux Power Outlet
Diesel Fuel Pump, DERM, ECM
Lic Lamp, Park Lamp, Tail Lamp, Roof
Marker Lamp, Tdi1 Gate Lamps, Front Side
Markers, Door Switch Illum, Fender Lamps
DERM
Wiper
Motor, Washer Pump
A/C, A/C Blower, High Blower Relay
Power Amp, Rear Liftglass, Cig Lighter,
Door Lock Relay, Pwr Lumbar Seat
4WD, Indicator, LP Cluster, HVAC
Controls,
RR HVAC Controls, IP Switches,
Radio Illumination
DRL Relay,
Fog Lamp Relay
Frt Turn, RR Turn, B/U Lps
Radio (Ign)
DRAC, 4WAL PCM. ABS,
... . Cruise
Radio (Batt)
PRNDL, Auto Transmission, Speedo,
Check Gages Tell Tde
Not Used Not Used
Page 361 of 486
Downloaded from www.Manualslib.com manuals search engine LAMP OR BULB
INSTRUMENT
PANEL
SIR (Air Bag)
Safety Belt Warning
Check Gages Indicator
Malfunction Indicator (”Service Engine
Soon”) Lamp
Upshift Indicator
Glow
Plugs Lamp**
Low Coolant Lamp**’
Water
in Fuel Lamp**
Service Throttle Soon
Lamp**
**Diesel only
?Canadian Vehicles only
TRADE NO.
74
74
74
74
74
74
74
74
74