
The purpose  of regular rotation  is to  achieve more uniform wear  for all tires 
on the vehicle.  The  first rotation is the most important.  See “Scheduled 
Maintenance  Services” 
in the  Index  for scheduled rotation intervals. 
FRT 
I 
II 
FRT 
If your  vehicle has single rear wheels, always  use one  of the  correct  rotation 
patterns  shown here when rotating your tires. 
If  your vehicle has front tires  with different  load ranges 
or tread  designs 
(such  as all  season  vs. on/off  road) than  the  rear  tires. don‘t  rotate your tires 
front 
to rear. 
W v 
If  your vehicle  has dual rear wheels and  the load range  and tread  design  for 
your  front  tires 
is the same  as your rear tires, always use one of  the  correct 
rotation patterns  shown here  when rotating your tires. 
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If your engine has more  than one  emissions  classification, the classification 
is determined by the Gross  Vehicle  Weight  Rating  (GVWR) of your  vehicle 
as shown  on  the Certification  Label.  See “Loading  Your  Vehicle” 
in the 
Index. 
Once  you’ve determined your  engine type and, 
if necessary, emissions 
classification,  you’ll need to  decide which  of  the  two schedules  is  right  for 
your vehicle.  See Definitions  for Maintenance  Schedule 
I and Maintenance 
Schedule 
I1 following. 
Schedule  I Definition - Gasoline  Engines  With  Light  Duty 
Emissions 
Follow Maintenance  Schedule I if any  one of these  is true for your vehicle: 
iII Most  trips are  less than 5 to 10 miles (8 to 16 km). This  is particularly 
important  when outside temperatures  are  below freezing. 
0 Most trips include  extensive idling (such as frequent driving in 
stop-and-go  traffic). 
You operate your vehicle in dusty  areas  or off-road  frequently. 
0 You frequently  tow a trailer. 
Schedule 
I should also be  followed if the  vehicle  is  used  for  delivery 
service,  police, taxi, or other commercial  application. 
Schedule I Intervals - Gasoline  Engines  With  Light  Duty 
Emissions 
Every 
3,000 Miles (5 000 km) or 3 Months,  Whichever Occurs First 
Engine Oil and Filter  Change 
Chassis  Lubrication 
Drive Axle Service 
At 6,000 Miles (10 000 km) - Then  Every 12,000 Miles (25 000 km) 
Tire  Rotation 
Every 75,000 Miles (25 000 km) 
Air Cleaner Filter Inspection, if driving in dusty  conditions 
Front Wheel Bearing Repack 
(or at each brake  relining)  (2WD  Only) 
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Every 30,000 Miles (50 000 km) 
Air Cleaner  Filter  Replacement 
Spark  Plug Replacement 
Fuel  Filter  Replacement 
Clutch 
Fork Ball  Stud  Lubrication  (5-Speed Manual Transmission  With 
Deep-Low  Only) 
Cooling  System  Service  (or every 
24 months, whichever  occurs  first) 
Every 50,000 Miles (83 000 km) 
Automatic  Transmission  Service  (severe  conditions only) 
Every 60,000 Miles (100 000 km) 
Engine Accessory  Drive Belt Inspection 
Spark Plug Wire Inspection 
Engine  Timing  Check 
Fuel Tank,  Cap and Lines Inspection 
Schedule 11 Definition - Gasoline  Engines  With  Light Duty 
Emissions 
Follow  Schedule I1 only if none of the conditions  from  Schedule I is true. 
Schedule  I1 Intervals - Gasoline Engines  With Light  Duty 
Emissions 
Every 
7,500 Miles (12 500 km) 
Engine  Oil and  Filter  Change  (or  every 12 months, whichever  occurs  first) 
Chassis  Lubrication  (or every 
12 months, whichever  occurs  first) 
Drive  Axle Service 
At 7,500 Miles (12 500 km) - Then  Every 15,000 Miles (25 000 km) 
Tire Rotation 
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Schedule I Intervals - Gasoline Engines  with  Heavy  Duty 
Emissions 
Every 
3,000 Miles  (5 000 km) 
Engine Oil  and Filter  Change  (or every 3 months, whichever  occurs  first) 
Chassis  Lubrication  (or every 
3 months,  whichever  occurs  first) 
Drive Axle  Service 
At 6,000 Miles (10 000 km) - Then  Every 12,000 Miles (25 000 km) 
Tire Rotation 
Every 12,000 Miles (20 000 km) 
Air Cleaner  Filter Inspection, if Driving in Dusty  Conditions 
Front Wheel  Bearing Repack  (or  at Each Brake Relining)  (2-Wheel Drive 
Only 
1 
Fuel Filter  Replacement 
Engine Accessory  Drive  Belt Inspection 
Shields 
and Underhood  Insulation  Inspection 
Thermostatically  Controlled  Engine Cooling  Fan Check  (or every 
12 
months, whichever  occurs  first) 
Every 24,000 Miles  (40 000 km) 
Cooling  System  Service  (or  every 24 months, whichever  occurs  first) 
Air  Cleaner  Filter Replacement 
Engine  Timing  Check 
Thermostatically  Controlled  Air Cleaner Inspection 
Air Intake  System Inspection 
Every 27,000 Miles (45 000 km) 
Spark Plugs Replacement 
Every 30,000 Miles  (50 000 km) 
Clutch Fork  Ball Stud Lubrication  (%Speed  Transmission with Deep-Low 
Only) 
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Every 50,000 Miles (83 000 km) 
Automatic Transinission Service 
Every 60,000 Miles (100 000 km) 
Spark Plug Wire  Inspection 
Exhaust  Gas Recirculation  (EGR) System Inspection 
Fuel  Tank,  Cap and Lines Inspection 
Evaporative Control System Inspection 
Electronic  Vacuum Regulator  Valve 
(EVRV j Inspection 
Schedule  I1 Definition - Gasoline Engines  With  Heavy  Duty 
Emissions 
Follow Schedule TI only if none of the  conditions  from Schedule I is true. 
Schedule  I1 Intervals - Gasoline  Engines with-Heavy  Duty 
Emissions 
Every 
6,000 Miles (10 000 km) 
Engine Oil and Filter Change (or every 3 months.  whichever occurs  first) 
Clussis Lubrication (or every 3 months,  whichever occurs first) 
Drivc Axle  Scrvice 
At 6,000 Miles (10 000 km) - Then  Every 12,000 Miles (20 000 km) 
Tire Rotation 
Every 12,000 Miles (20 000 km) 
1 
Engine Accessory  Drive  Belt Inspection 
Shields  and Underhood  Insulation Inspection 
Thermostatically  Controlled Engine Cooling 
Fan Check (or every 12 
months, whichever  occurs  first) 
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I Schedule  I  Intervals - Diesel  Engines I 
Every 2,500 Miles (4 000 km) 
Engine Oil  and Filter  Change  (or every 3 months, whichever occurs  first) 
Chassis  Lubrication  (or every 
3 months, whichever  occurs  first) 
Air  Cleaner  Filter Inspection. 
if Driving in Extremely Dusty or Dirty 
(Off-Road)  Conditions 
Every 5,000 Miles (8 000 km) 
Drive Axle Service 
Every 7,500 Miles (12 000 km) 
Air Cleaner Filter Inspection, if Driving in Dusty Conditions 
At 7,500 Miles (12 000 km) - Then  Every 15,000 Miles  (24 000 km) 
Tire Rotation 
Every 10,000 Miles (I 6 000 km) 
Shields  and Underhood Insulation Inspection 
Thermostatically  Controlled Engine Cooling  Fan Check  (or every 
12 
months,  whichever  occurs  first) 
Air Intake System Inspection 
Every 15,000 Miles  (24 000 km) 
Air Cleaner  Filter Replacement 
Front Wheel Bearing Repack 
(or at  Each  Brake Relining)  (2-Wheel  Drive 
Only j 
Every 30,000 Miles (50 000 km) 
Clutch Fork Ball Stud Lubrication  (%Speed  Transmission  with  Deep-Low 
Only:) 
Fuel Filter  Replacement 
Cooling 
System Service (or every 24 months, whichever  occurs  first) 
Every 50,000 Miles (80 000 km) 
Automatic Transmission Service 
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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 I - Gasoline  Engines  With 
Light  Duty  Emissions 
3,000 Miles (5 000 km) 
[7 Change  engine  oil  and filter  (or every 3 months, whichever  occurs 
first). 
An Emission Control Sen7ic.e. 
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 
(-1 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). 
C Check rear/front axle fluid  level  and add -fluid as needed. Check 
constant  velocity  joints  and 
axle seals for leaking. *'* 
DATE SERVICED BY: ACTUAL MILEAGE I 
6,000 Miles (10 000 km) 
iI Change  engine  oil and  filter  (or every 3 months, whichever  occurs 
first). 
AI? Emission Confro1 Ser\lic.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" E 
(,-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. 
*'$ 
(Contiwed) 
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