Page 355 of 404

Long Tripmighway Maintenance Schedule -- Gasoline Engines I
The services shown in this schedule up to 100,000 miles
(1 66 000 km) should be performed after 100,000 miles
(166 000 km) at the same intervals.
Footnotes
j- The U.S. Environmental Protection Agency or 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 the vehicle’s useful life.
We, however, urge that all recommended
maintenance services be performed at
the indicated
intervals and the maintenance be recorded.
# Lubricate the front suspension, kingpin bushings,
steering linkage, transmission shift linkage, transfer
case shift linkage, parking brake cable guides, rear
driveline center splines, front axle propshaft splines
and brake pedal springs. Ball joints and kingpin
bushings should not be lubricated unless their
temperature is
10°F (- 12°C) or higher, or they
could be damaged.
‘k‘k Drive axle service:
a
e
e
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 (25 000 km).
More frequent lubrication may be required for
heavy-duty or off-road use.
3500 HD Models with applications requiring extreme
overloadtrailer towing conditions and high-speed
(above
45 mph or 70 kmh) conditions for extended
periods
of time must have the drive axle fluid changed
every
30,000 miles (50 000 km). See ”Recommended
Fluids and Lubricants”
in this section.
I
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Page 356 of 404

Long Tripmighway Maintenance Schedule -- Gasoline Engines I
7,500 Miles (12 500 km)
0 Change engine oil and filter (or every
12 months, whichever occurs first).
An Emission Control Service.
Lubricate chassis components; see footnote #
(or every 12 months, whichever occurs first).
c] 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. During tire rotation,
check brake calipers for freedom
of movement.
Refer to the appropriate
GM service manual for
proper caliper service procedures.
15,000 Miles (25 000 km)
0 Change engine oil and filter (or every
12 months, whichever occurs first).
An Etttission Control Service.
0 Lubricate chassis components; see footnote ##
(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. **
0 Vehicles With GVWR Above 8,500 lbs.
Only: Inspect shields and underhood insulation
for damage or looseness. Adjust
or replace
as required. This is a Noise Emission
Contr-ol Service. Applicable
orzly to vehicles sold in
the Ulzited Stcltes.
7-30
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Page 357 of 404

Long Tripmighway Maintenance Schedule -- Gasoline Engines
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.
TIzis is a Noise
Enzissior.2
Corztrol Service. Applicable ody to
vel~icles sold irz the United States.
~~ ~ ~~
DATE
SERVICED BY ACTUAL MILEAGE -
22,500 Miles (37 500 km)
0 Change engine oil and filter (or every
12 months, whichever occurs first).
An Emission Control Service.
0 Lubricate chassis components; see footnote #
(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.
**
0 Rotate tires. See “Tire Inspection and Rotation’’
in the Index for proper rotation pattern and
additional information. During tire rotation,
check brake calipers for freedom
of movement.
Refer
to the appropriate GM service manual for
proper caliper service procedures.
I DATE I ACTUAL MILEAGE ISERVICED BY I
7-31
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Page 358 of 404

Long Trip/Highway Maintenance Schedblt: -- Gasoline Enginee
30,000 Miles (50 000 km)
0 Change engine oil and filter (or every
12 months, whichever occurs first).
An Emission Corztrol Service.
0 Lubricate chassis components; see footnote #
(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. :k:f:
0 For Two-Wheel-Drive vehicles only: Clean and repack the front
wheel bearings (or at
' each brake relining, whichever occurs first).
0 Replace fuel filter. An Emission Cmrd Ser-vice. 3'
0 Vehicles With GVWR Above 8,500 lbs.
Only: Inspect shields and underhood
insulation for damage or looseness. Adjust
or replace as required.
Tlzis is L[ Noise Emissiorz
Control Service.
Appliccrble only to \vhiclt~s sol~i in
the United Stutes.
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
Emissior~
Control Service. Applicwble only to
vehicles sold in the United Stutes.
7-32
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Page 359 of 404

Long Tripmighway Maintenance Schedule -- Gasoline Engines
37,500 Miles (62 500 km)
0 Change engine oil and filter (or every
12 months, whichever occurs first).
An Et12ission Control Service.
0 Lubricate chassis components; see footnote #
(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.
**
0 Rotate tires. See “Tire Inspection and Rotation”
in the Index for proper rotation pattern and
additional information. During tire rotation,
check brake calipers for freedom of movement.
Refer to the appropriate
GM service manual for
proper caliper service procedures.
I ACTUAL MILEAGE I SERVICED BY I
45,000 Miles (75 000 km)
0 Change engine oil and filter (or every
12 months, whichever occurs first).
An Emissiorl Cuntr-ol Service.
0 Lubricate chassis components; see footnote #
(or every 12 months, whichever occurs first).
El Check readfront axle fluid level and add
fluid
as needed. Check constant velocity
joints and axle seals for leaking.
:w
0 Vehicles With GVWR Above 8,500 lbs.
Only: Inspect shields and underhood
insulation for damage or looseness. Adjust
or replace
as required. This is LZ Noise Enaission
Control
Service. Applicwble oldy to whicles sold in
tlw United Stntes.
(Continued)
7-33
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Page 361 of 404
Manual transmission fluid doesn’t require change.
DATE ACTUAL MILEAGE SERVICED BY:
52,500 Miles (87 500 km)
0 Change engine oil and filter (or every
12 months, whichever occurs first).
An Ewissioi1 Control Service.
0 Lubricate chassis components; see footnote ##
(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.
**
0 Rotate tires. See “Tire Inspection and Rotation”
in
the Index for proper rotation pattern and
additional information. During tire rotation,
check brake calipers for freedom of movement.
Refer to the appropriate
GM service manual for
proper caliper service procedures.
~ ~ ~~
DATE ACTUAL MILEAGE SERVICED BY:
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Page 362 of 404

Con Tripmighway Maintenance Schedule -- Gasoline Engines
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 chassis components; see footnote #
(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.
‘w
For Two-Wheel-Drive vehicles only: Clean
and repack
the front wheel bearings (or at
each brake relining, whichever occurs first).
0 Inspect engine accessory drive belt.
c] Replace fuel filter. AII Emissiorz Control Service.
An En?.ission Control Service.
0 Inspect fuel tank, cap and lines for damage
or leaks. Inspect
fuel cap gasket for any
damage. Replace parts as needed.
An Etnission Control Service.
c] Vehicles With GVWR Above 8,500 lbs.
Only: Inspect shields and underhood
insulation for damage or looseness. Adjust
or replace
as required. This is a Noise Emission
Control Service. Applicdde
ouly to wkicles sold in
the United Stms.
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 (7 Noise
Elnission Control Service. Applicable
only to
rvhiclps
snl~J in tlw Unitd Stms.
7-36
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Page 363 of 404

Long Tripmighway Maintenance Schedule -- Gasoline Engines
0 Conduct Exhaust Gas Recirculation (EGR)
system inspection as described
in the
service manual.
An Emissiorz Control Service. 3‘
inspection. Check all fuel and vapor lines
and hoses for proper hook-up, routing and
condition. Check that
the purge valve works
properly, if equipped. Replace
as needed.
0 Conduct evaporative control system
At1 Emission Control Service. -f-
I DATE I ACTUAL MILEAGE ISERVICED BYI
67,500 Miles (112 500 km)
0 Change engine oil and filter (or every
12 months, whichever occurs first).
An E1uissim Control Service.
0 Lubricate chassis components; see footnote #
(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. **
0 Rotate tires. See “Tire Inspection and Rotation“
in the Index for proper rotation pattern and
additional information. During tire rotation,
check brake calipers for freedom
of movement.
Refer
to the appropriate GM service manual for
proper caliper service procedures.
I DATE I ACTUAL MILEAGE I SERVICED BY:
7-37
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