
Treadwear 
The treadwear  grade is a comparative rating based on the wear rate of the 
tire when tested under controlled conditions  on 
a specified government test 
course.  For  example, 
a tire graded  150 would wear  one and a half (1 1/2) 
times  as well on the government  course as  a tire graded 100. The relative 
performance 
of tires  depends  upon the actual  conditions of their use, 
however, and  may depart significantly  from the  norm  due to variations 
in 
driving  habits, service practices  and differences in road characteristics  and 
climate. 
Traction - A, B, C 
The  traction  grades, from highest to lowest  are: A, B, and C. They represent 
the tire’s ability to  stop on wet  pavement 
as measured under controlled 
conditions  on specified government test surfaces  of asphalt and  concrete. 
A 
tire marked C may have poor traction performance. 
Warning:  The traction grade assigned  to this tire 
is based  on braking 
(straight-ahead)  traction tests and  does not include cornering (turning) 
traction. 
Temperature - A, B, C 
The  temperature  grades are A (the highest), B, and C, representing the tire’s 
resistance  to the  generation 
of heat and its ability  to dissipate heat when 
tested  under controlled  conditions  on a specified indoor laboratory test 
wheel. Sustained high temperature  can  cause the material 
of the tire  to 
degenerate  and reduce tire life, and  excessive temperature can lead 
to 
sudden tire  failure.  The  grade C corresponds to a level  of  performance 
which all passenger  car tires  must  meet under the Federal Motor  Vehicle 
Safety  Standard 
No. 109. Grades B and A represent  higher levels  of 
performance 
on the laboratory test wheel than the minimum required  by 
law. 
Warning:  The temperature  grade  for this tire is established  for  a tire that is 
properly  inflated and 
not overloaded.  Excessive  speed,  underinflation, or 
excessive  loading,  either  separately or in combination,  can cause heat 
buildup  and possible  tire  failure. 
These  grades  are molded on the sidewalls  of passenger  car tires. 
While  the  tires available  as standard  or optional  equipment  on General 
Motors  vehicles  may  vary  with respect  to these  grades,  all  such tires meet 
General  Motors performance  standards and have been approved  for  use  on 
General  Motors  vehicles. 
All passenger type (P Metric) tires must  conform 
to Federal safety requirements in addition  to  these  grades. 
6-64 
ProCarManuals.com 

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 

Whenever a wheel, wheel bolt or wheel nut is replaced on a dual wheel 
setup, check  the wheel nut torque after 100, 1,000 and 6,000 miles ( 160, 
1 600 and 10 000 km) of driving.  For proper  torque,  see “Wheel Nut 
Torque” in the  Index. 
Used Replacement Wheels 
A CAUTION: 
Putting a used  wheel  on your  vehicle is dangerous. You can’t 
know 
how it’s  been  used  or how  many  miles  it’s  been  driven. It 
could  fail suddenly  and cause  an accident. If you have  to replace 
a wheel  use a new GM original equipment  wheel. 
7 
c 
‘ire Chains 
NOTICE: 
If your  vehicle  has dual  wheels  or LT265/75R16 size  tires,  don’t 
use  tire  chains;  they  can damage your  vehicle. 
If you  don’t  have dual wheels  or if  you  have a tire size  other 
than 
LT26975R16, use  tire  chains  only  where  legal  and only 
when  you  must.  Use  chains that  are  the proper  size for your 
tires.  Install them  on the  tires  of the  rear  axle. 
Don’t  use  chains on the  tires 
of the  front  axle. 
Tighten them 
as tightly  as possible  with  the ends  securely 
fastened.  Drive  slowly  and follow  the chain manufacturer’s 
instructions.  If  you can  hear  the  chains contacting your  vehicle, 
stop  and  retighten  them.  If the contact  continues,  slow down 
until  it stops.  Driving  too  fast 
or spinning the wheels  with  chains 
on 
will damage your  vehicle. 
6-66 
ProCarManuals.com 

Protecting  Exterior  Bright  Metal  Parts 
Bright metal  parts  should  be  cleaned  regularly to keep  their luster. Washing 
with  water  is all  that  is usually  needed.  However,  you  may use 
GM Chrome 
Polish  on chrome  or  stainless  steel trim,  if necessary. 
Use  special  care  with aluminum  trim. 
To avoid  damaging  protective  trim, 
never  use auto  or  chrome  polish,  steam  or  caustic  soap  to clean  aluminum. 
A  coating  of wax,  rubbed  to  high polish,  is  recommended  for  all bright 
metal  parts. 
Aluminum  Wheels (If So Equipped) 
Your  aluminum  wheels  have  a  protective  coating  similar  to the painted 
surface  of your  vehicle.  Don’t use strong  soaps, chemicals,  chrome  polish, 
abrasive  cleaners  or  abrasive  cleaning  brushes 
on them  because  you could 
damage  this  coating.  After rinsing  thoroughly,  a wax  may  be applied. 
I NOTICE: 
If you  have  aluminum  wheels,  don’t  use  an  automatic  car  wash 
that  has  hard  silicon  carbide  cleaning  brushes.  These  brushes  can  take  the  protective  coating 
off your  aluminum  wheels. 
Tires 
To clean  your  tires,  use a stiff  brush  with a tire cleaner. 
When  applying  a  tire  dressing  always  take care to wipe  off  any  overspray  or 
splash  from painted  surfaces.  Petroleum-based  products may damage  the 
paint  finish. 
Sheet  Metal  Damage 
If your  vehicle  is  damaged  and  requires  sheet  metal  repair  or  replacement, 
make  sure  the  body repair  shop  applies  anti-corrosion  material to the  parts 
repaired  or  replaced  to restore  corrosion  protection. 
Foreign  Material 
Calcium  chloride  and  other  salts,  ice  melting  agents,  road oil and tar, tree 
sap,  bird  droppings,  chemicals  from  industrial  chimneys,  and  other  foreign \
matter  can  damage  your  vehicle’s  finish  if they  remain  on painted  surfaces. 
Use  cleaners  that  are  marked  safe  for  painted  surfaces  to remove  foreign 
matter. 
6.- 73 
ProCarManuals.com 

Appearance  Care  Materials  Chart 
PART NO. 
1050172 1050173 
1050 174  10502 
14 
1050244 
1050427 
1050429 
1050729 
1051055  1051398 
1052870  105020 
1 
SIZE 
16  oz.  (0.473L) 
16 
oz. (0.473L) 
16 
oz. (0.473L) 
32 
oz. (0.946L) 
16 oz.  (0.473L) 
23 
oz. (0.680L) 
6  Ibs.  (2.72 
kg) 
8 oz. (0.237L) 
16 oz. (0.473L) 
8 oz.  (0.237L) 
16 oz. (0.473L) 
16 oz. (0.473L) 
PRODUCT 
Tar and Road 
Oil  Remover 
USAGE 
Removes old 
waxes, polishes, 
tar and road oil 
Chrome  Cleaner  Removes 
rust 
and Polish  and corrosion on 
chrome 
and 
stainless steel 
White Sidewall 
Tire  Cleaner 
Vinyl  Leather 
Cleaner 
Fabric  Cleaner 
Glass Cleaner 
Multi-Purpose 
Powder  Cleaner 
Vinyl Top 
Cleaner 
Preservatone 
Spot Lifter 
Wash-Wax  (conc 
.) 
Magic Mirror 
Cleaner-Polish  Cleans 
white 
and  black  tires 
Spot 
and stain 
removal  on 
leather  or 
vinyl 
Spot and stain 
removal on cloth  and  fabric 
Glass cleaning 
and spot 
cleaning  on 
vinyls 
Cleans 
vinyl and 
cloth on door 
trim,  seats,  and 
carpet-also  tires and mats. 
Cleaning 
of 
vinyl tops 
Vinyl  top 
dressing 
Spot  and stain 
removal  on cloth 
and  fabric 
Exterior  wash 
Exterior cleaner 
and polish 
6-75 
ProCarManuals.com 

Maintenance  Schedule I - Gasoline  Engines  With 
Light 
Duty Emissions ~~~~  ~~  ~  ~ 
(Continued) 
0 Rotate  tires. See "Tire  Inspection and Rotation" in the Index  for  proper 
rotation pattern and additional information. 
I DATE I ACTUAL  MILEAGE I SERVICED BY: 
9,000 Miles (15 000 km) 
0 Change  engine  oil and filter (or every 3 months, whichever  occurs 
first). 
An Emission Control Service. 
Lubricate the front  suspension,  king  pin bushings, steering linkage, 
transmission  shift  linkage, transfer case shift linkage, parking brake 
cable  guides, rear  driveline center splines,  front  axle propshaft splines, 
brake pedal  springs  and clutch  pedal springs.  Ball joints  and king  pin 
bushings  should 
not be  lubricated unless their temperature  is IO" F 
(-12" C), or higher. When weather is cold,  let the ball joints  and king 
pin bushings  warm up before lubrication  or they  could  be damaged. 
Perform  each  of the listed lubrication service items  at this mileage 
interval 
(or every 6 months, whichever  occurs  first). 
0 Check readfront  axle  fluid level and add fluid as needed. Check 
constant  velocity joints and axle  seals  for  leaking. 
*'g 
DATE SERVICED BY: ACTUAL MILEAGE 
7-14 
ProCarManuals.com 

Maintenance  Schedule I - Gasoline  Engines  With 
Light  Duty  Emissions 
(Continued) 
0 Check  rear/front axle fluid level and add fluid as needed. Check 
constant  velocity joints and axle  seals  for  leaking. 
'v'F 
0 For 2-Wheel  Drive vehicles only: Clean and repack the front wheel 
bearings  (or at each brake relining, whichever  occurs  first). 
I H I 
I DATE I ACTUALMILEAGE I SERVICED BY: 
18,000 Miles (30 000 km) 
ll Change  engine oil and filter  (or every 3 months, whichever  occurs 
first). 
An Emission Corltrol Service. 
IJ Lubricate  the front  suspension,  king pin bushings,  steering  linkage, 
transmission  shift linkage, transfer case shift linkage, parking brake 
cable  guides.  rear driveline center splines. front axle propshaft splines, 
brake  pedal springs  and clutch  pedal springs.  Ball joints  and  king 
pin 
bushings  should not  be lubricated unless their temperature  is 10" F 
(-12" C), or higher.  When weather  is cold.  let  the  ball  joints and king 
pin  bushings  warm 
up before lubrication  or they  could  be damaged. 
Perform each  of the  listed  lubrication service items  at this mileage 
interval  (or every 
6 months, whichever occurs  first). 
c3 Check  readfront axle fluid  level  and add fluid  as needed. Check 
constant  velocity joints and axle seals  for leaking. 
-&-'&- .> .!, 
D Rotate  tires. See "Tire Inspection and Rotation" in the  Index  for proper 
rotation pattern  and additional  information. 
DATE SERVICED BY: ACTUAL MILEAGE 
7- 16 
ProCarManuals.com 

LI 
c 
Maintenance Schedule I - Gasoline  Engines  With 
Light  Duty  Emissions 
(Contimed) 
Drain, flush  and refill  cooling  system (or every 24 months, whichever 
occurs  first).  See  "Engine  Coolant'' 
in the lndex  for what to use. 
Inspect hoses. Clean radiator. condenser. pressure  cap and  neck. 
Pressure  test 
the cooling system and pressure  cap. An Emission  Control 
Service. 
For 2-Wheel Drive vehicles  only: Clean  and repack  the front  wheel 
bearings  (or at each brake relining, whichever  occurs  first). 
Replace  spark plugs. 
An E~~zissior~ Corztrol Ser-vice. 
Replace  air cleaner filter.  Replace  filter more often under dusty 
conditions. 
An Emission Cor~tr-01 Service. 
Rotate tires.  See "Tire  Inspection  and Rotation" in the lndex for proper 
rotation pattern  and additional information. 
I DATE I ACTUAL MILEAGE I SERVICED BY: 
33,000 Miles (55 000 km) 
0 Change  engine  oil and  filter  (or every 3 months, whichever  occurs 
first). 
An Er7rissiou Contmi Service. 
0 Lubricate  the front  suspension,  king pin bushings, steering  linkage, 
transmission  shift  linkage, transfer case shift linkage,  parking brake 
cable  guides,  rear driveline  center  splines,  front  axle propshaft  splines, 
brake pedal  springs  and clutch pedal  springs. 
Ball joints  and king  pin 
bushings  should  not  be lubricated  unless their temperature  is 
10" F 
(-I 2" C), or higher.  When  weather is cold, let  the ball joints  and king 
pin bushings  warm up before lubrication  or they could be damaged. 
Perform 
each of the listed lubrication  service items  at this mileage 
interval  (or every 
6 months,  whichever  occurs  first). 
ProCarManuals.com