
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 
7- 10 
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Every 60,000 Miles (100 000 km) 
Crankcase Depression  Regulator Valve (CDRV)  System  Check 
Engine  Accessory  Drive Belt Inspection 
Fuel Tank,  Cap and Lines  Inspection 
Evaporative  Control System Inspection 
Exhaust  Gas Recirculation  (EGR) System  Inspection 
(if equipped) 
Exhaust  Pressure  Regulator Valve Inspection 
I Schedule 11 Definition - Diesel Engines 
Follow  Schedule II on!\- if none ofrhe conditions i'wm Schcdtilc I Is truc. 
-- 
I Schedule  I1 lntervals - Diesel  Engines 1 
Every 5,000 Miles (8 000 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 5,000 Miles (8 000 km) - Then  Every 10,000 Miles (16 000 km) 
Tire Rotation 
Every 10,000 Miles (16 000 km) 
Shields  and Underhood  insulation  Inspection 
Air Intake  System Inspection 
Thermostatically  Controlled Engine  Cooling  Fan Check  (or every 
I2 
months,  whichever  occurs  first) 
Every 30,000 Miles (48 000 km) 
Cooling  System  Service  (or every 24 months,  whichever  occurs  first) 
Front Wheel  Bearing Repack  (or 
at Each Brake  Relining)  (2-Wheel  Drive 
Fuel  Filter  Replacement 
Air  Cleaner  Filter Replacement 
Clutch Fork  Ball  Stud Lubrication  (5-Speed Transmission  with  Deep-Low 
Only) 
Only) 
7-11 
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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. 
7-12 
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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) 
7-13 
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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 
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Maintenance  Schedule I - Gasoline  Engines  With 
Light  Duty  Emissions 
12,000 Miles (20 000 km) 
0 Change  engine  oil and filter (or every 3 months, whichever  occurs 
first). 
An  Emission  Control  Sewice. 
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 lung  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). 
0 Check  readfront axle fluid level and  add fluid as needed. Check 
constant  velocity joints and axle  seals  for  leaking. 
** 
I DATE I ACTUALMILEAGE I SERVICED BY: I 
15,000 1 Ies (25 000 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  10" 
F 
(-1 2 O 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 Inspect air cleaner  filter  if you are driving  in dusty  conditions.  Replace 
filter  if necessary. 
An Emission  Control  Service. 
(Continued) 
7-15 
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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 
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Maintenance  Schedule 1 - Gasoline  Engines  With 
Light  Duty  Emissions 
21,000 Miles (35 000 km) 
0 
0 
Change  engine  oil and  filter  (or  every 3 months, whichever  occurs 
first). 
An Emissiot~ 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 
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). 
Check  readfront  axle fluid  level and add fluid  as needed. Check 
constant  velocity joints and axle  seals  for  leaking. 
*#: 
DATE  SERVICED BY: ACTUAL MILEAGE 
24,000 Miles (40 000 km) 
0 
Change  engine  oil and filter (or every 3 months, whichever  occurs 
first). 
AJ~ Emission Control Senice. 
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). 
Check  readfront  axle 
fluid level and  add  fluid as needed. Check 
constant  velocity joints and axle  seals  for  leaking. 
** 
7-17 
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