
Wheel  Alignment  and  Tire  Balance 
The wheels on your vehicle  were aligned  and balanced  carefully  at the 
factory 
to give  you the longest tire life and best overall  performance. 
In most cases, you will not need to have your wheels aligned  again. 
However,  if 
you notice unusual  tire wear  or your  vehicle  pulling  one  way or 
the other, 
the alignment  may need to be reset. If you  notice  your  vehicle 
vibrating  when driving 
on a smooth  road, your wheels  may  need to be 
rebalanced. 
Wheel  Replacement 
Replace  any wheel that  is bent,  cracked,  or badly rusted  or corroded. If 
wheel nuts  keep  coming  loose,  the wheel,  wheel bolts, and  wheel nuts 
should be  replaced. 
If the wheel  leaks air,  replace it (except  some aluminum 
wheels, which  can  sometimes  be repaired).  See your 
GM dealer  if any of 
these  conditions  exist. 
Your dealer  will know the kind  of wheel  you need. 
Each  new wheel  should have the same load  carrying capacity, diameter, 
width, offset,  and be mounted the  same way as the  one 
it replaces. 
If you need to replace  any of your  wheels, wheel bolts,  or wheel  nuts, 
replace them  only with new 
GM original  equipment  parts. This way,  you 
will be sure to have  the right  wheel, wheel bolts,  and wheel nuts for your 
vehicle. 
A CAUTION: 
Using  the wrong replacement  wheels,  wheel  bolts,  or wheel  nuts 
on  your  vehicle  can be dangerous.  It could  affect  the  braking 
and  handling 
of your  vehicle,  make your tires  lose air  and  make 
you  lose  control, You could have a  collision in which 
you or 
others  could be injured.  Always  use  the correct  wheel,  wheel 
bolts,  and wheel 
nuts for replacement. 
NOTICE: 
The  wrong  wheel  can also cause problems  with bearing  life, 
brake  cooling,  speedometer/odometer calibration, headlamp 
aim,  bumper  height,  vehicle  ground clearance,  and  tire or  tire 
chain clearance to  the body  and chassis. 
6-65 
ProCarManuals.com 

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 clrculc DreaKer  ana a ruse. 11 
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 standard  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. 
6-79 
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POSITION 
23. 
24. 
A.% 
B . -1- 
NAME 
Not Used 
CIRCUITS  PROTECTED 
Not Used 
4WD  Frt 
Axle, 4WD  Indicator  Lamp 
PWR ACCY Pwr Door Lock, 6-Way  Pwr Seat,  Keyless 
Entry Module 
PWR 
WDOS 
?Circuit  Breaker 
Lamp and Bulb Data 
LAMP OR 
BULB 
HEADLAMPS 
2 Headlamp 
System  (Sealed 
Beam) 
Low/High  Beam 
4 Headlamp 
System 
(Composite) 
Low/High  Beam 
High Beam 
LAMP  OR  BULB 
EXTERIOR 
Front Marker Lamp 
Front Park and Turn 
Lamp 
Rear  Parking 
Lamp 
Rear  Stop  and Turn 
Lamp 
Backup  Lamp 
Backup 
Lamp 
Rear Park, Stop, and 
Turn  Lamp*  Power Windows 
TRADE  NO. 
H6054 
6052 
9005  POWER 
RATING  AT 
12.8V, WATTS 
35/65 
TRADE NO. 
55/65 
65 
194 
2357NA 
3057 
3057 
3  156 
1156 
1157  2 
2 
2 
2 
4 
2 
2 
2 
2 
2 
6-88 
ProCarManuals.com 

LAMP OR BULB 
INSTRUMENT 
PANEL 
Daytime  Running 
Lamps Indicator? 
Charging  System 
Indicator  Lamp 
Instrument  Cluster 
Illumination 
Headlamp  Beam 
Indicator 
Directional  Signal 
Indicator 
Brake  Warning 
Indicator 
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 
“fanadian  Vehicles only 
TRADE NO. 
74 
74 
194 
74 
74 
74 
74 
74 
74 
74 
74 
74 
74 
74 
74 
1 
I 
6 
1 
2 
1 
6-90 
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Break.In.  New  Vehicle ............................................ 2-9 
Composite  Headlamps ......................................... 6-49 
Bulb  Replacement Center 
High Mounted  Stop  Lamp  (CHMSL) ........................ 6-54 
Fender  Marker  Lamps .......................................... 6-53 
Front  Park/Turn  Signal  Lamps  with  Composite  Headlamps ............ 6-51 
Front  Park/Turn  Signal  Lamps  with  Sealed  Beam  Headlamps ........... 6-50 
HalogenBulbs ................................................ 6-48 
Rear  Lamps  (Chassis  Cab  Models) ................................ 6-56 
Rear  Lamps  (Pickup  Models) .................................... 6-55 
Replacement  Chart ............................................. 6-88 
Roof  Marker  Lamps ........................................... 6-54 
Sealed  Beam  Headlamps ........................................ 6-47 
Side  Marker  Lamps ............................................ 6-52 
Tailgate  Marker  Lamps ......................................... 6-53 
C 
Capacities  and  Specifications ....................................... 6-80 
CarbonMonoxide ............................................... 2-32 
Care of Your  Cassette  Tape  Player  (See  “Audio  Systems” ) 
Cassette  Tape  Player  System  (See  “Audio  Systems” ) 
Catalyticconverter .............................................. 6-57 
Center  High  Mounted  Stop  Lamp (CHMSL) (See  “Lamps” ) 
Certificatioflire  Label ........................................... 4-37 
Changing  a  Flat  Tire .............................................. 5-26 
Chemical  Paint  Spotting ........................................... 6-74 
Cigarette  LightedAshtrays ......................................... 2-58 
Child  Restraints  (See  “Safety  Belts”) 
Circuit  Breakers  (See  “Fuses  and  Circuit  Breakers”) 
Cleaning  DieselEngine 
................................................ 6-14 
Fabric  Protection .............................................. 6-69 
Finishcare .................................................. 6-72 
Glass ....................................................... 6-71 
InsideofVehicle .............................................. 6-68 
Leather ..................................................... 6-70 
Instrument  Panel,  Top .......................................... 6-70 
Outside of Vehicle ............................................. 6-72 
Outside of the  Windshield  and  Wiper  Blades ........................ 6-71 
Special  Problems .............................................. 6-69 
Vinyl ....................................................... 6-70 
Weatherstrips ................................................. 6-71 
Audio  System  with  AUTO  TONE  System ........................... 3-7 
Audio  System  without  AUTO  TONE  System ........................ 3-6 
Underbody .................................................. 6-74 
WheelsandTires .............................................. 6-73 
Clock,  Setting  the 
ComfortControls 
................................................. 3-1 
Compact  Disc  (CD)  System  (See  “Audio  Systems”) 
Compass 
....................................................... 2-54 
Control  of  a  Vehicle ............................................... 4-4 
Coolant  (See  “Engine”) 
Cooling  System  Capacity 
.......................................... 6-82 
Courtesy  Transportation ............................................ 8-7 
CrankcaseCapacity .............................................. 6-83 
2 
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H 
Halogen  Bulbs (See "Bulb  Replacement") 
Hazard  Warning  Flashers 
........................................... 5-1 
Head Restraints  (See "Seats") 
Headlamps  and  Vehicle Lighting 
.................................... 2-48 
Replacement  (See "Bulb  Replacement") 
High  Beam  Indicator  Light  (See "Lights") 
High-Low  Beam  Changer 
...................................... 240 
Reminder .................................................... 2-49 
Heater Controls .................................................. 3-1 
Refrigerant  Capacity ........................................... 6-85 
Heater/Air  Conditioning  Controls ............................... 3-2 . 6-46 
Highway  Hypnosis (See "Driving-Highway  Hypnosis") 
Hitches  (See "Towing-Hitches") 
Hood 
Checking  Under:  Hood  Release .................................. 6-13 
Horn .......................................................... 2-38 
Hydraulic  Clutch ................................................ 6-31 
When to Check and  What to Use ................................. 6-32 
Howtocheck ................................................ 6-32 
Hydroplaning  (See "Driving in the Rain") 
I 
If You're  Stuck in Sand . Mud.  Ice . or Snow ........................... 5-39 
Ignition Switch .................................................. 2-10 
Intlation-Tire Prussure (See "Tires") 
Instrument  Cluster 
............................................... 2-68 
InstrumentPanel ................................................ 2-68 
J 
Jacking  Equipment  Storage ................................... 5-27 . 5-28 
Jump Starting .................................................... 5-2 
K 
Key Lock Cylinders ......................................... 6-46.7-94 
Key Release Button .............................................. 2-11 
Keyless  Entry System ............................................. 2-7 
Keys 
........................................................... 2-1 
L 
Labe 1 s 
Lamps 
Certification/Tire  (See  "CertificaticdTire  Label") 
CargdCenter  High Mounted  Stop  Lamp 
...................... 2.52, 2.83 
Daytime  Running Lamps ....................................... 2-50 
Dome 
....................................................... 2-51 
Fog ........................................................ 2-49 
Headlights 
(See "Headlamps") 
5 
ProCarManuals.com 

Lamps (continued) 
Lamp  and Bulb  Data 
........................................... 6-88 
Reading 
..................................................... 2-51 
Replacement  (See “Bulb  Replacement“) 
Underhood  Reel Lamp 
......................................... 2-52 
Lights ......................................................... 2-70 
Air Bag Readiness Light 
................................... 1-20,  2-71 
Anti-.  Lock  Brake System  Warning  Light 
........................... 2-73 
Brake System  Warning Light 
.................................... 2-72 
Charging  System  Warning Light 
.................................. 2-76 
Daytime  Running  Lamps (DRL) Indicator Light 
................ 2-50,  2-77 
Check 
Gages Light 
............................................ 2-77 
Glow  Plugs Light 
............................................. 2-75 
Headlamp  High Beam Indicator Light 
............................. 2-78 
Headlights  (See  “Headlamps”)  Low Coolant  Warning Light 
................................ 2-75,  6-38 
Malfunction  Indicator 
..................................... 2-76,  6-57 
Safety  Belt Reminder  Light 
..................................... 2-71 
Service  Throttle  Soon 
.......................................... 2-74 
ShiftLight 
.............................................. 2-25, 2-78 
Turn Signal  and Lane Change  Indicator Light .................. 240,  2-79 
Water 
in Fuel  (Diesel  Engine) .................................... 2-74 
Loading  Your  Vehicle 
............................................ 4-37 
Trailering  Package 
............................................ 4-39 
Truck-Camper  Loading 
........................................ 4-39 
Lock  Cylinders  (See “Key Lock Cylinders“) 
Loss of  Control  (See “Driving-Loss 
of Control”) 
Lubrication  (See  “Recommended Fluids and Lubricants“) 
M 
Malfunction  Indicator  Lamp  (See “Lights”) 
Maintenance  (See “Scheduled  Maintenance  Services”) 
Master  Cylinder  (See  “Brakes”) 
Mirrors  Convexoutside 
............................................... 2-56 
Electric  Outside  Rearview  Mirrors 
................................ 2-56 
Electrochromic  Inside  Rearview  Mirror 
............................ 2-54 
Inside 
....................................................... 2-53 
Outside 
..................................................... 2-56 
ModelReference 
.................................................. iv 
Multifunction  Lever .............................................. 2-39 
N 
Noise  Control  System ............................................ 6-14 
0 
Odometer  (See “Gages“) 
Off-Road  Driving (See  ”Driving-Off  Road  Driving”) 
Off-Road  Recovery 
............................................... 4-9 
6 
ProCarManuals.com