
Front rosluon Rear Position 
With UP on the ratchet  facing  you,  raise the vehicle by rotating the ratchet 
and  wheel  wrench clockwise.  Raise the vehicle 
far enough off the ground so 
there is enough room for  the  spare tire to fit. 
Remove 
all the wheel 
nuts  and take 
off the 
flat  tire, 
A CAUTION: 
Rust  or  dirt  on the  wheel,  or on  the  parts  to which  it  is  fastened, 
can make the  wheel nuts become  loose  after a time.  The wheel 
could  come 
off and  cause  an accident.  When you change a  wheel, 
remove  any rust  or  dirt  from the places  where the  wheel attaches 
to the vehicle.  In  an emergency,  you can use a cloth or a  paper 
towel 
to do  this;  but be sure  to use a scraper  or wire  brush  later, 
if you need  to,  to get  all  the rust  or  dirt off. 
5-35 
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I 
A ,CAUTION: 
Storing  a jack, a tire or other  equipment in the  passenger 
compartment 
of the  vehicle could cause  injury.  In a sudden stop 
or collision,  loose  equipment could strike  someone.  Store  all 
these 
in the  proper  place. 
Stowing  the 
Tire - Under-Body  Carrier 
Stow the flat  tire under  the rwr of the vehicle in spare  tire carrier. To stow 
the  flat tire: 
1. 
AI 3 
3. 
4. 
5. 
Put the tire  on the  ground at the  rear of the  vehicle with the valve stern 
pointed  down. 
Pull the  wheel  retainer through thc  wheel opening. 
Attach  the  ratchet 
to the urheel  n'rench with the UP marking  Facing 
you. 
Put the other  end of the  whcel  wrench  through the rcar bumper access 
hole, located  at  the passenger  side edge 
of the license plate. Be sure  the 
wheel  wrench  connects into the hoist 
shaft. 
Turn the ratchet clockwise  to raise  the tire.  Keep turning the ratchet 
until the  tire is all the  way up. You will hear two  "clicks"  when  the  tire 
is secure. Pull on  the  tire to nuke sure it is tightly secured. 
Stowing  the Jack and  Jacking Tools 
Return the jack, ratchet,  wheel wrench  and jack  extensions to their location 
behind  the passenger's 
seat. Stow  thc jack and jacking tools as shown in the 
illustrations  earlier 
in this part. Secure the items and replace  the jack  cover, 
if there  is one. 
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Tires 
We don’t  make  tires. Your new vehicle  comes with  high-quality  tires made 
by a leading tire manufacturer.  These tires are warranted  by the tire 
manufacturers,  and their warranties  are delivered 
with every  new vehicle.  If 
your  spare  tire is a different brand than your road tires,  you  will have 
a tire 
warranty  folder from each 
of these manufacturers. 
A CAUTION: 
Poorly maintained  and improperly  used tires are dangerous. 
Overloading your  tires can cause overheating  as a result of too 
much friction.  You could  have an  air-out  and  a serious 
accident.  See  “Loading Your  Vehicle”  in the  Index. 
Underinflated  tires pose  the same  danger  as  overloaded  tires. 
The  resulting accident  could cause serious injury.  Check all 
tires frequently  to maintain the  recommended  pressure. Tire 
pressure should  be  checked  when  your tires are cold. 
Overinflated tires  are more  likely  to be  cut, punctured,  or 
broken  by 
a sudden impact, such as when  you  hit a pothole. 
Keep  tires 
at the recommended  pressure. 
Worn,  old tires can cause  accidents. If your tread  is  badly 
worn,  or if your tires have  been damaged, replace  them. 
Inflation - Tire  Pressure 
The Certification/Tire  label  which  is on the rear edge of  the  driver‘s  door, or 
on the incomplete vehicle  document in the cab,  shows the correct inflation 
pressures  for your tires, when  they’re  cold. “Cold“ tneans your vehicle 
has 
been sitting for at least three hours  or driven  no more than  a mile. 
You  can operate some vehicles  at reduced inflation pressures only when 
you’ll be  carrying reduced loads.  On those vehicles,  the minimum cold 
inflation pressures  for 
a typical reduced load are printed  on the  “Improved 
Ride  Tire  Pressure” label located  on the  driver’s  door. Weigh  the  vehicle to 
find the load on each tire  and see the  label  for the minimum cold inflation 
pressures  for that load. 
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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: 
0 Too much  flexing 
Too much  heat 
0 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. 
If your vehicle has dual rear 
wheels,  also  see 
“Dual Tire Operation”  later in this section. 
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A CAUTION: 
If you operate your vehicle  with a tire  that is badly 
underinflated,  the  tire  can overheat. An overheated  tire 
can lose 
air suddenly or catch  fire. You or others  could be injured. Be 
sure  all tires  (including  the  spare, if any)  are properly  inflated. 
Buying New Tires 
To find out what  kind and size  of tires  you need, look  at the 
CertificationRire  label. 
The  tires  installed  on your  vehicle when 
it was new  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. 
I A CAUTION: 
Mixing tires could cause you to lose  control  while  driving. If you 
mix  tires  of different  sizes or types  (radial  and  bias-belted  tires), 
the  vehicle  may  not handle properly,  and you could have 
a crash. 
Be sure  to  use the same  size and  type  tires  on all four  wheels. 
Uniform  Tire  Quality  Grading 
The  following  information  relates to the system  developed  by the United 
States  National  Highway Traffic  Safety Administration  which  grades tires 
by  treadwear, traction  and  temperature  performance. 
(This applies  only to 
vehicles  sold in the  United  States.) 
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REPORTING  SAFETY  DEFECTS TO THE 
CANADIAN  GOVERNMENT 
If you live in Canada,  and you  believe  that your vehicle has  a safety  defect, 
you  should  immediately  notify Transport Canada, in addition 
to notifying 
General  Motors  of Canada  Limited. 
You may write to: 
Transport  Canada 
Box 8880 
Ottawa,  Ontario K1 G 352. 
REPORTING  SAFETY  DEFECTS  TO  GENERAL  MOTORS 
In  addition to notifying  NHTSA  (or Transport  Canada) in a situation  like 
this, we  certainly  hope 
you’ll notify us. Please call us at 
1-800-GMC-TRUCK  (1-800-462-8782),  or write: 
GMC  Truck  Consumer  Relations 
3 
1 E. Judson  Street  1607-04 
Pontiac,  MI  48342-2230 
In  Canada,  please  call 
us at 1-800-263-3777  (English)  or 1-800-263-7854 
(French).  Or, write: 
General  Motors of Canada  Limited 
Customer  Assistance  Center 
1908  Colonel  Sam  Drive 
Oshawa,  Ontario 
LlH 8P7 
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 Change: Installation of spare  tire  will be covered  at no  charge 
(customer 
is responsible  for  repair or replacement  of tire). 
Fuel Delivery: Delivery of enough  fuel  for the customer  to  get to the 
nearest service  station (up to $4.00). 
Jump  Start: 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 a 10-mile  radius. 
8-5 
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Seats  (continued) Reclining  Front Seatbacks 
....................................... 1-3 
Seatback  Latches 
........................................... 14. 1-8 
Doing  Your  Own Service  Work ................................... 6-1 
Parts  Identification  Label 
..................... 
Service 
Publications 
................................. 
Replacement  Parts  and Filter Recommendations .... 
Service  Engine  Soon  Light  (See  “Lights”) 
Servicing  Your  Air Bag-Equipped  Vehicle (See “Supple 
System  (SIR)”) 
Shift Indicator  Light (See *‘Lights“) 
Shifting  Into  Park (P) 
........................... 
Shifting  Out of Park ............................. 
Shock  Absorbers  (Front) ......................... 
.................. 6-78 
.................. 8-8 
....... 6-80.6-84,6-85 
:r nental Inflatable  Restraint 
................. 2-28 
................. 2-29 
................. 6-45 
Specifications  Chart  (See “Service . Replacement  Parts  and Filter 
Recommendations“)  SpareTire 
................................................. 5-28.5-29 
Speedometer  and Odometer  (See  “Gages”) 
Starting  Your Engine  (See ”Engine-Starting”) 
Steering 
........................................................ 4-7 
Column  Shift Lever 
............................................ 2-29 
InEmergencies 
................................................ 4-8 
Tips 
......................................................... 4-7 
Step-Bumperpad ................................................ 2-84 
Storage  Compartments 
............................................ 2-59 
Sunvisors 
..................................................... 2-57 
Supplemental  Inflatable  Restraint  System  (SIR) 
........................ 1-19 
Adding  Equipment  to  Your Facial Air  Bag-Equipped  Vehicle 
.......... 1-23 
How the Air Bag System  Works .................................. 1-20 
Servicing  Your  Air Bag-Equipped  Vehicle 
......................... 1-23 
Surge Tank Pressure  Cap 
.......................................... 6-39 
T 
Tachometer (See “Gages”) 
Tail~ate 
......................................................... 2-4 
Removal ..................................................... 2-4 
TIleft ........................................................... 2-8 
Thermostat 
..................................................... 6-40 
Tilt Wheel  (Option) .............................................. 2-38 
Tires 
.......................................................... 6-58 
Balancing  (See  “Wheel  Alignment and Tire  Balance”) 
Chains 
...................................................... 6-66 
Dual Tire Operation ........................................... 6-62 
Flat  (See  ”Changing 
a Flat Tire”) 
Inspection  and Rotation 
........................................ 6-59 
Loading  (See “Loading  Your Vehicle”) 
New 
........................................................ 6-63 
Pressure 
..................................................... 6-58 
Spare  (See ”Spare  Tire”) 
Uniform Tire Quality  Grading 
................................... 6-63 
Top  Strap  (See  “Safety Belts-Child  Restraints“) 
Torque Lock  (See “Transmission-Torque  Lock“) 
9 
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