
Maintenance  Schedule II - Gasoline  Engines  With 
Heavy Duty Emissions 
27,000 Miles (45 000 km) 
0 Replace spark plugs. An Emission Control Service. 
DATE 
SERVICED BY: ACTUAL MILEAGE 
~~ - 
30,000 Miles (50 000 km) 
0 Change engine oil  and  filter (or every 12 months, whichever  occurs 
first). 
An Emissiorl 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). 
0 Check redfront  axle fluid  level and add fluid  as needed. Check 
constant  velocity  joints and axle seals for leaking.** 
0 Rotate tires. See  "Tire Inspection and Rotation" in the Index  for  proper 
rotation pattern  and additional  information. 
DATE  SERVICED BY: ACTUAL 
MILEAGE 
7-56 
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Maintenance Schedule II - Gasoline  Engines  With 
Heavy  Duty  Emissions 
36,000 Miles (60 008 km) 
ci Change  engine oil and filter  (or every I2 months. whichever  occurs 
first). 
AH Emissiot.r  CoF1tro1 Sc>rvice. 
cl 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 
12 months. whichever  occurs  first). 
Check rear/front  axle fluid  level  and add fluid  as needed. Check 
constant  velocity joints and axle seals  for 
DATE SERVICED BY: ACTUAL  MILEAGE 
42,000 Miles (70 000 km) 
[7 Change  engine  oil  and filter  (or  every 12 months,  whichever  occurs 
first). 
An Emissiolz Control Service. 
ci 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 
(-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  12 months, whichever  occurs  first). 
(Continued) 
7-57 
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Maintenance Schedulell - Gasoline  Engines  With 
Heavy  Duty  Emissions 
(Continued) rn 
0 Check  readfront  axle  fluid  level and add fluid as needed. Check 
constant  velocity joints and axle  seals  for  leaking.** 
Rotate tires.  See “Tire Inspection  and Rotation” in the Index  for proper 
rotation pattern and additional information. 
DATE  SERVICED BY: ACTUAL MILEAGE 
48,000 Miles (80 000 km) 
0 
13 
0 
U 
0 
Change  engine  oil  and filter  (or  every 12 months, whichever  occurs 
first). 
An Ernission  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  12 months, whichever  occurs first). 
Check  readfront  axle fluid level  and  add  fluid 
as needed. Check 
constant  velocity joints and axle seals for  leaking.”“ 
Inspect  engine accessory drive belts 
(os every 24 months, whichever 
occurs  first). 
Arz Emission  CmtroI Service. 
lnspect camshaft timing  belt. An Elnission Contl-01 Senice. 
Drain, flush and refill cooling  system  (or every 24 months, whichever 
occurs  first). See  “Engine  Coolant” 
in the Index for what  to use. 
Inspect hoses. Clean radiator, condenser, pressure  cap and neck. 
Pressure  test. the cooling system  and pressure 
cap. Ai? Emissio~  Control 
Service. 
(Con tin  ued) 
7-58 
ProCarManuals.com 

I 
Maintenance  Schedule II - Gasoline  Engines With 
Heavy Duty Emissions 
54,000 Miles (90 000 km) 
0 Change engine oil and filter  (or  every I2 months. whichever occurs 
first). 
An Elnissiou Control San?ice. 
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  ofthe listed lubrication  service items  at this mileage 
interval (or every 
12 months.  whichever  occurs  first). 
0 Check rear/front  axle tluid  level  and  add fluid as needed. Check 
constant  velocity joints and axle seals 
for leaking.''c:l: 
0 Replace  spark plugs. AI? Emission Corltrol Service. 
0 Rotate tires.  See "Tire  Inspection  and  Rotation'' in the  Index  for proper 
rotation  pattern  and  additional information. 
DATE SERVICED BY: ACTUAL MILEAGE 
7-40 
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Maintenance Schedule II - Gasoline  Engines  With 
Heavy  Duty  Emissions 
60,000 Miles (100 000 km) 
0 Change  engine oil and  filter  (or  every 12 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). 
c! Check  readfront  axle tluid  level and  add fluid as needed. Check 
constant  velocity joints and axle seals  for leaking.":'" 
Ll Inspect  engine accessory drive belts (or every 24 months.  whichever 
occurs  first). 
AII E1uission Corztrol Scrvicu. 
I DATE I ACTUALMILEAGE I SERVICED BY: I 
7-61 
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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 
7-62 
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I Maintenance  Schedule I - Diesel  Engines I 
5,000 Miles (8 000 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). 
constant  velocity joints and axle seals  for  leaking. 
:k* 
0 Check readfront  axle  fluid  level and add fluid as needed. Check 
I DATE I ACTUALMILEAGE I SERVICED BY: I 
7,500 Miles (12 000 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). 
0 Rotate  tires.  See "Tire  Inspection  and Rotation'' in the Index  for proper 
rotation  pattern and additional  information.  See "Tires" 
in the Index. 
DATE 
SERVICED BY: ACTUAL MILEAGE 
7-63 
ProCarManuals.com 

Maintenance Schedule I - Diesel  Engines 
10,000 Miles (16 000 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). 
Adjust  or replace as required. 
This  is  a  Noise  Emission  Control 
Service.  Applicable  only  to  vehicles  sold  in  the  United  States.\
 
0 Inspect shields and underhood insulation for  damage  or looseness. 
0 Check the air intake system installation to assure that gaskets  are 
properly  sealed and that  all hose  connections,  fasteners and other 
components  are  tight. 
Also check to be sure that  the air cleaner housing 
is properly  seated, the  cover  fits tightly and  the  wing nuts are tight. 
Tighten connections  and fasteners  or  replace damaged  parts 
as 
necessary. This  is a Noise  Emission  Control  Service.  Applicable  only 
to  vehicles  sold 
in the  United  States. 
0 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  t\
he 
United  States. 
Check  readfront  axle fluid level and add fluid as needed. Check 
constant velocity  joints and axle seals for leaking. 
*+ 
DATE  SERVICED BY: ACTUAL  MILEAGE I 
7-64 
ProCarManuals.com