Long Trip/Highway Scheduled Maintenance
7-46
100,000 Miles (166 000 km)
Gasoline Engine Only: Inspect spark plug wires.
An Emission Control Service.
Gasoline Engine Only: Replace spark plugs. An Emission Control Service.
Change automatic transmission fluid and filter if the vehicle has a diesel
engine, if the vehicle's GVWR is over 8600 lbs. or if the vehicle is mainly
driven under one or more of these conditions:
± In heavy city traffic where the outside temperature regularly
reaches 90F (32C) or higher.
± In hilly or mountainous terrain.
± When doing frequent trailer towing.
± Uses such as found in taxi, police or delivery service.
If you haven't used your vehicle under severe service conditions listed
previously and, therefore, haven't changed your automatic transmission fluid,
change both the fluid and filter.
Gasoline Engine Only (Except 8.1L V8): Inspect Positive
Crankcase Ventilation (PCV) valve.
An Emission Control Service. ACTUAL
SERVICED BY:MILEAGE
DATE
7-50
Weatherstrip Lubrication
Silicone grease on weatherstrips will make them last
longer, seal better, and not stick or squeak. Apply
silicone grease with a clean cloth. During very cold,
damp weather more frequent application may be
required. See ªRecommended Fluids and Lubricantsº
in the Index.
Automatic Transmission Check
Check the transmission fluid level; add if needed. See
ªAutomatic Transmission Fluidº in the Index. A fluid
loss may indicate a problem. Check the system and
repair if needed.At Least Once a Year
Key Lock Cylinders Service
Lubricate the key lock cylinders with the lubricant
specified in Part D.
Body Lubrication Service
Lubricate all hood hinges, hood prop rod pivot, fuel
filler door, rear compartment hinges, latches, locks,
hood latch assembly, secondary latch, pivots, spring
anchor, release pawl and any moving seat hardware.
Part D tells you what to use. More frequent
lubrication may be required when exposed to a
corrosive environment.
7-56
USAGEFLUID/LUBRICANT
Hydraulic
Brake SystemDelco Supreme 11 Brake Fluid
(GM Part No. 12377967 or
equivalent DOT
-3 brake fluid).
Windshield
Washer SolventGM Optikleen Washer
Solvent (GM Part No. 1051515)
or equivalent.
Parking Brake
Cable GuidesChassis Lubricant (GM Part
No. 12377985 or equivalent)
or lubricant meeting requirements
of NLGI # 2, Category LB
or GC
-LB.
Power
Steering SystemGM Power Steering Fluid
(GM Part No. 1052884
- 1 pint,
1050017
- 1 quart, or equivalent).
Automatic
TransmissionDEXRON-III Automatic
Transmission Fluid.
Key
Lock CylindersMulti-Purpose Lubricant,
Superlube (GM Part
No. 12346241 or equivalent).
USAGEFLUID/LUBRICANT
Chassis
LubricationChassis Lubricant (GM Part
No. 12377985 or equivalent)
or lubricant meeting requirements
of NLGI # 2, Category LB
or GC
-LB.
Front
Wheel BearingsWheel bearing lubricant meeting
requirements of NLGI # 2,
Category GC or GC
-LB (GM
Part No. 1051344 or equivalent).
Rear Axle
(1500 Series Only)SAE 75W-90 Synthetic
Axle Lubricant (GM Part
No. 12378261) or
equivalent meeting
GM Specification 9986115.
Rear Axle
(2500 and
3500 Series
with Standard
Differential Only)SAE 80W-90 Axle Lubricant
(GM Part No. 1052271
or equivalent).
