
Care of  Safety  Belts 
Keep belts clean and dry. 
A CAUTION: 
Do not  bleach  or  dye  safety  belts.  If  you do, it may  severely 
weaken  them.  In  a  crash  they  might  not  be  able  to  provide 
adequate  protection.  Clean  safety  belts  only  with  mild  soap  and\
 
lukewarm  water. 
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  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. 105001 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.) 
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How This  Section  is  Organized 
The  remainder of this section is divided  into  five parts: 
“Part A: Scheduled  Maintenance  Services” shows  what to have  done and 
how  often.  Some 
of these services can  be complex, so unless  you are 
technically  qualified and have the necessary  equipment, you should  let your 
dealer’s  service  department or  another qualified  service center  do these 
jobs. 
If you  are skilled enough to  do some  work  on  your vehicle,  you  will 
probably  want  to get the service information 
GM publishes.  See  “Service 
Publications” 
in the Index. 
“Part B: Owner  Checks  and  Services” tells  you  what  should be checked 
whenever  you stop  for fuel. 
It also explains  what  you  can  easily do to help 
keep 
your vehicle in good  condition. 
“Part  C: Periodic  Maintenance  Inspections” explains  important 
inspections  that your 
GM dealer’s service department  or another qualified 
service  center  should perform. 
“Part D: Recommended Fluids and  Lubricants” lists some  products GM 
recommends  to help  keep your vehicle properly maintained.  These products, 
or  their  equivalents,  should be  used  whether  you do the  work  yourself  or 
have it  done. 
“Part E: Maintenance  Record” provides  a place for you to record the 
maintenance  performed  on your vehicle. Whenever  any maintenance 
is 
performed,  be sure  to write it down in this part.  This will help you 
determine  when your next maintenance should  be done. 
In addition, it is a 
good idea to keep your maintenance receipts. They  may be needed  to 
qualify your  vehicle for warranty repairs. 
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Part A: Scheduled  Maintenance  Services 
Using Your Maintenance Schedule 
We at General  Motors  want to help  you keep your vehicle in good working 
condition.  But  we don’t  know exactly  how you’ll  drive it. You  may  drive 
very  short  distances  only 
a few times  a week.  Or you  may  drive  long 
distances  all the time 
in very hot, dusty weather.  You  may use your vehicle 
in making  deliveries.  Or  you  may drive it to work, to  do  errands  or in many 
other  ways. 
Because 
of all  the different ways people  use their  GM vehicles, maintenance 
needs  varv. 
You may even  need more frequent  checks and replacements than 
you‘ll  find 
in the schedules in this  section. So please read  this section and 
note  how  you  drive. If you  have any  questions  on how  to keep your vehicle 
in good  condition.  see  your GM dealer. 
This  part  tells  you the maintenance  services  you should have  done and 
when 
you should  schedule  them. If you go to your  dealer  for  your service  needs, 
you’ll  know that  GM-trained  and  supported  service people 
will perform the 
work  using  genuine 
GM parts. 
The  proper  fluids  and  lubricants to use are listed 
in Part  D.  Make  sure 
whoever  services your  vehicle uses these. 
All parts  should  be replaced  and 
all  necessary  repairs  done before  you or anyone  else  drives  the vehicle. 
These  schedules  are  for  vehicles that: 
carry passengers and cargo  within recommended  limits. You will find 
these  limits  on your vehicle’s  CertificatiodTire  label.  See  “Loading 
Your  Vehicle“ 
in the Index. 
are  driven  on  reasonable  road surfxes  within  legal  driving limits. 
are driven  off-road in the recommended  manner.  See “Off Road 
Driving  With  Your  Four-wheel  Drive Vehicle” 
in the Index. 
use the recommended  unleaded fuel.  See “Fuel” in the index. 
Selecting  the  Right  Schedule 
The proper  maintenance  schedule for your vehicle  depends on which  engine 
you  have 
in your vehicle and  how  you  use your vehicle. 
Gasoline  engine  vehicles and diesel  engine  vehicles have different 
maintenance  requirements. 
If you have  a diesel  engine,  follow a schedule 
designated  for  diesel engine  vehicles only.  If  you have 
a gasoline  engine. 
you  must first  determine  whether your  engine has 
a light duty  or  a heavy 
duty  emissions  classification.  Follow a maintenance  schedule designated 
for 
for your  engine.  See  “Engine  Identification” in the Index  to find your 
engine‘s emission  classification. 
c easoline  engines with the emissions  classification  (light duty or heavy  duty) 
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Every 50,000 Miles (83 000 km) 
Automatic Transmission Service 
Every 60,000 Miles (100 000 km) 
Crankcase Depression Regulator  Valve (CDRV)  System Inspection 
Engine  Accessory  Drive Belt Inspection 
Exhaust  Gas Recirculation  (EGR) System Inspection 
(if equipped) 
Exhaust Pressure Regulator  Valve Inspection 
Maintenance  Schedule I - Gasoline  Engines  With 
Light 
Duty Emissions 
The services  shown in this  schedule up to 60,000 miles (1 00 000 km)  should 
be  performed  after 
60,000 miles (100 000 km) at the  same  intervals. 
Footnotes 
3 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. 
:$* Drive  axle  service: 
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  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. 
3500 HD  Models  with applications requiring  extreme overload/trailer 
towing  conditions  and high  speed (above 
45 mph or 72 kmh) 
conditions  for extended  periods of time must have the  drive  axle fluid 
changed  every 
3,000 miles (5 000 km) or 3 months, whichever  occurs 
first,  or must  use 
75W-140 synthetic fluid meeting GM specifications. 
See  “Recommended Fluids and Lubricants” 
in this  section. 
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Maintenance  Schedule II - Gasoline Engines With 
Light  Duty  Emissions 
The  services  shown in this schedule up to 60.000 miles ( 100 000 km)  should 
be  performed  after 
60.000 miles ( 100 000 km) at the same  intervals. 
Footnotes 
-i- 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  intsrkrds 
and t!w rnlrinlcn;nnx be recor-ded. 
0 
0 
0 
0 
Locking Differential - Drain iluid mci wi.il! :ii !.iI-st cngine oii 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 tluid  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). 
More  frequent  lubrication  may  be  required  for  heavy-duty  or  off\
-road  use. 
3500 HD Models with applications  requiring  extreme overload/trailer 
towing  conditions  and  high speed  (above 
45 mph or 72 km/h) 
conditions  for  extended  periods 
of time must have the drive axle fluid 
changed  every 
3,000 miles (5 000 km) or 3 months, whichever  occurs 
first,  or  must  use  7SW-140  synthetic tluid  meeting 
GM specifications. 
See  "Recommended  Fluids and  Lubricants" 
in this section. 
7,500 Miles (12 500 km) 
0 Change  engine oil and filter  (or  every 12 months. whichever  occurs 
first). 
A11 E1?7iLs.~io1I Corlti-ol Serl7ic-e. 
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 
12 months.  whichever  occurs  first). 
(ColltillltL'd) 
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I 
Maintenance  Schedule II - Gasoline  Engines  With 
Light  Duty  Emissions 
0 Replace spark plugs. At1 Emission  Control  Senlice. 
0 Inspect spark plug wires. Ai7 Emission Control  Service. ; 
0 Replace  air  cleaner filter. An E~~zission Control Sunice. 
- 
r! Inspect fuel tank, cap and lines for  damage or leaks. Inspect fuel  cap 
gasket  for  any  damage.  Replace parts 
as needed. An E~nission Control 
Service. ? 
DATE 
SERVICED BY: ACTUAL MILEAGE I 
< 
Maintenance  Schedule I - Gasoline  Engines  Heavy 
Duty  Emissions 
The  services  shown in this schedule  up to 60.000  miles ( 100 000 km)  should 
be  performed  after 
60.000 miles (100 000 km) at the same intervals. 
Footnotes 
*<: Drive  axle  service: 
a 
a 
0 
a 
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  engine  oil change. 
If driving in dusty  areas or towing a trailer, 
drain fluid and refill every 
15,000 miles (25 00 km). 
More  frequent  lubrication  may  be required for  heavy-duty or off-road 
use. 
3500 HD Models with applications requiring extreme overload/trailer 
towing  conditions  and high  speed  (above 
45 mph or 72 km/h) 
conditions  for  extended periods  of time must  have the drive  axle fluid 
changed every 
3,000 miles (5 000 km)  or 3 months, whichever occurs 
first,  or must  use 
75W-140 synthetic fluid meeting GM specifications. 
See  “Recommended  Fluids and Lubricants” 
in this section. 
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Maintenance  Schedule I - Gasoline  Engines  Heavy 
Duty Emissions 
(Continued) 
L! If your  engine  has a thermostatically controlled cooling fan, inspect all 
hoses and ducts  for proper  hook-up  (or every 12 months, whichever 
occurs  first). 
Be sure the valve  works  properly. This is a Noise 
Emission  Control  Service.  Applicable  only  to vehicles  sold  in  the 
United  States. 
DATE  SERVICED BY: ACTUAL  MILEAGE 1 I 
Maintenance  Schedule II - Gasoline  Engines  With 
Heavy  Duty  Emissions 
The  services shown in this schedule  up  to 60.000 miles ( 100 000 kn1) should 
be  performed  after 
60.000 miles ( IO0 000 km) at the same intervals. 
Footnotes 
.I, .!. -~*-~- Drive axle service: 
0 Locking  Differential - Drain fluid and  refill  at  first engine oil change. 
At  subsequent 
oil changes. check fluid 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. 
0 3500 HD Models  with  applications requiring extreme overload/trailer 
towing conditions  and  high speed  (above  45 
mph or 72 km/h) 
conditions for extended  periods of time  must  have the drive axle fluid 
changed  every 3.000  miles 
(5 000 km) or 3 months, whichever occurs 
first,  or  rnust  use  75W-140  synthetic tluid  meeting 
GM specifications. 
See  "Recommended  Fluids  and  Lubricants" 
in this section. 
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Maintenance  Schedule I - Diesel  Engines 
The  services shown in this schedule up to 60,000  miles (100 000 km) should 
be  performed  after 
60,000 miles  (100 000 km) at  the  same intervals. 
Footnotes 
* When  the vehicle  is operated in extreme  dust and dirt conditions 
(off-road),  the air cleaner  filter may  need  to be checked as often 
as every 
300 miles  (483 km) and replaced as necessary. 
** Drive  axle service: 
0 
0 
0 
0 
Locking  Differential - Drain fluid  and refill  at first  engine  oil change. 
At subsequent oil  changes, check fluid 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  engine  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. 
3500 HD Models with applications  requiring extreme overload/trailer 
towing  conditions  and  high speed (above 
45 mph or 72 km/h) 
conditions  for extended periods of time must have the drive axle fluid 
changed  every 
3,000 miles (5 000 km) or 3 months, whichever  occurs 
first,  or must  use  75W-140  synthetic fluid meeting 
GM specifications. 
See  “Recommended Fluids  and  Lubricants’’ 
in this section. 
2,500 Miles (4 000 km) 
0 Change  engine oil and filter (or every 3 months, whichever  occurs 
first). 
An Emission Control 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 
(-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  12 months, whichever  occurs  first). 
DATE SERVICED BY: ACTUAL MILEAGE I 
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