
Maintenance Schedule I - Gasoline Engines  Heavy 
Duty  Emissions 
(Continued) 
0 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 
42,000 Miles (70 000 km) 
0 Change  engine oil and filter  (or  every 3 months,  whichever  occurs 
first). 
AH 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 
(-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  leaking.*':: 
0 Rotate tires.  See  "Tire Inspection  and Rotation" in the Index  for proper 
rotation  pattern  and  additional  information. 
DATE 
SERVICED BY: ACTUAL  MILEAGE 
7-45 
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Maintenance  Schedule I - Gasoline  Engines  Heavy 
Duty Emissions 
45,000 Miles (75 000 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 Check redfront  axle fluid level  and add fluid as needed. Check 
constant  velocity joints and axle  seals  for  leaking.** 
DATE SERVICED BY: ACTUAL MILEAGE 
48,000 Miles (80 000 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). 
I7 Check readfront  axle  fluid level and add fluid  as needed. Check 
constant velocity  joints and axle  seals for leaking.** 
(Continued) 
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Maintenance Schedule I - Gasoline  Engines  Heavy 
Duty  Emissions 
(Continued) 
0 
0 
0 
0 
0 
0 
0 
Drain,  flush  and refill  the  cooling system with new coolant (or every  24 
months,  whichever  occurs  first).  See  “Engine  Coolant”  in the Index  for 
what  to use. 
An  Emission  Control  Service. 
Also inspect the hoses and  replace them if they are  cracked,  swollen or 
deteriorated.  Tighten all hose  clamps  (except  constant tension  clamps). 
Remove  debris  and clean the outside 
of the radiator  and  air 
conditioning  condenser. Wash the radiator neck. 
To ensure  proper 
operation,  pressure test the radiator and  cap. 
Replace  air  cleaner  filter. Replace  filter more often under dusty 
conditions. 
An Emission  Control  Sewice. 
For 2-Wheel  Drive vehicles  only: Clean  and repack the front  wheel 
bearings  (or at each brake  relining, whichever  occurs  first). 
Replace  fuel filter.  Replace  filter  sooner  if it is  clogged.? 
Adjust  timing 
to underhood  label  specifications. Inspect the inside and 
outside 
of the  distributor  cap  and rotor for cracks, carbon  tracking and 
corrosion.  Clean or replace as needed. 
An  Emission  Control  Service. 
This  is  a  Noise  Emission  Control  Service. 
If your vehicle has  a thermostatically  controlled  air cleaner, inspect all 
hoses  and ducts  for  proper hook-up.  Be  sure the valve works properly. 
An Emission  Control  Service. This  is  a  Noise  Emission  Control 
Service. 
Inspect  accessory  drive (serpentine) belt  for cracks,  fraying  and wear 
and  check  belt for proper tension. Adjust  or replace belt as needed. 
An 
Emission  Control  Service. 
Inspect  shields  and  underhood insulation  for  damage or looseness. 
Adjust  or replace  as required. 
This  is  a  Noise  Emission  Control 
Service.  Applicable  only  to  vehicles  sold  in  the  United  States.\
 
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. 
(Continued) 
7-47 
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Maintenance  Schedule I - Gasoline  Engines  Heavy 
Duty  Emissions 
(Continued) 
c1 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. 
I DATE I ACTUALMILEAGE I SERVICED BY: I 
50,000 Miles (83 000 km) 
0 Change  transmission fluid and filter if the vehicle is mainly driven 
under  one  or  more of these conditions: 
0 In heavy  city traffic where  the outside temperature regularly 
reaches 
90°F (32°C) or higher. 
0 In hilly or  mountainous  terrain. 
0 When  doing  frequent  trailer towing. 
Uses such as found in taxi, police or delivery  service. 
If you do not use your velzic*le  under my of these conditiom,  the jluid 
md filter do not require  chnngirTg. 
Manual transmission  fluid doesn’t require  change. 
0 Lubricate transmission shift linkage, parking brake cable  guides and 
underbody contact points  (or every 
6 months, whichever occurs  first). 
DATE  ACTUAL MILEAGE SERVICED BY: 
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Maintenance  Schedule I - Gasoline  Engines  Heavy 
Duty  Emissions 
51,000 Miles (85 000 km) 
Change  engine  oil and  filter  (or  every 3 months, whichever  occurs 
first). 
AI? Emission Cor.1trol Service. 
El 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 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: 
54,000 Miles (90 000 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 
(-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). 
7-49 
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Maintenance  Schedule I - Gasoline  Engines  Heavy 
Duty  Emissions 
(Continued) 
Check  readfront  axle fluid  level  and add tluid  as  needed. Check 
constant  velocity joints and axle seals for leaking.*'k 
0 Replace  spark plugs. AI? Emissio~ Control Service. 
0 Rotate tires. See "Tire  Inspection and Rotation" in the Index for proper 
rotation pattern and additional  information 
DATE  SERVICED BY: ACTUAL  MILEAGE 
57,000 Miles (95 000 km) 
Cl Change  engine oil  and filter  (or  every 3 months, whichever  occurs 
first). 
An  Enzission  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 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  readfront axle fluid level  and add fluid as needed. Check 
constant velocity  joints and axle seals for  leaking.*"" 
DATE SERVICED BY: ACTUAL  MILEAGE 
7-50 
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Maintenance Schedule I - Gasoline  Engines  Heavy 
Duty  Emissions 
60,000 Miles (100  000 km) 
0 
0 
0 
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  c1utc.h pedal springs.  Ball joints  and king  pin 
bushings  should not be 1ubricate.d  unless their  temperature  is 10" 
F 
(-1 2" C j, 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.*'+ 
For  vehicles  equipped 
with a 5-speed  manual transmission  with deep 
low:  Lubricate  the clutch fork  ball stud through the fitting  on the clutch 
housing.  Lubricant  must  be added 
sparirzgl~ to the  fitting, as very  little 
is  required  to  lubricate the ball stud  surface. 
Do not add lubricant more 
often than  specified. 
Too much  lubricant  will  damage  the  clutch 
assembly. 
Inspect  air  cleaner  filter if you are  driving in dusty  conditions.  Replace 
filter  if necessary. 
An  Emission Cor-ltrol Serrice. 
Replace  fuel  filter. Replace  filter  sooner if it is clogged.? 
Inspect  spark plug wires. 
A77  E~~zission Control Service. i- 
Inspect fuel tank,  lines.  rails, injection assembly,  cap and  cap  gasket. 
An Emissiopz  Control  Service.  ?-Fuel jilter replacement  is  not  required 
Inspect  accessory  drive  (serpentine)  belt for  cracks,  fraying  and wear 
and  check  belt for  proper  tension.  Adjust  or replace belt as needed. 
An 
Emission  Control  Service. 
Inspect  shields and underhood  insulation  for damage or looseness. 
Adjust  or replace 
as required. This is a  Noise  Emission  Control 
Service.  Applicable  only 
to vehicles  sold  in  the  United  States. 
7-51 
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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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