Page 6 of 321
iv
Maintenance Schedule Service and Appearance Care
Section
7
Section
6
Scheduled Maintenance
Owner Checks and Services
Periodic Maintenance InspectionsRecommended Fluids and Lubricants
Maintenance Records Fuel
Checking Fluids and Lubricants
Engine Air Cleaner/Filter
Brakes
Bulb Replacement
Windshield Wiper Blade ReplacementTires and Wheels
Appearance Care
Electrical System/Fuses and Circuit Breakers
Capacities and Specifications
Normal Maintenance Replacement Parts
Page 184 of 321

6-
6-1
Section 6 Service and Appearance Care
Here you will find information about the care of your vehicle. This section begins with service and fuel information,
and then it shows how to check important fluid and lubricant levels. There is also technical information about your
vehicle, and a part devoted to its appearance care.
6
-2 Service
6
-3 Fuel (Gasoline Engine)
6
-5 Fuels in Foreign Countries (Gasoline Engines)
6
-5 Filling Your Tank (Gasoline Engine)
6
-7 Filling a Portable Fuel Container
6
-7 Checking Things Under the Hood
6
-10 Noise Control System
6
-11 Engine Oil (Gasoline Engine)
6
-15 Engine Air Cleaner/Filter (Gasoline Engines)
6
-17 Automatic Transmission Fluid
6
-20 Manual Transmission Fluid
6
-21 Hydraulic Clutch
6
-22 Rear Axle
6
-23 Engine Coolant
6
-27 Radiator Pressure Cap (Gasoline Engine)
6
-27 Power Steering Fluid6
-28 Windshield Washer Fluid
6
-29 Brakes
6
-33 Battery
6
-33 Bulb Replacement
6
-40 Windshield Wiper Blade Replacement
6
-41 Tires
6
-51 Appearance Care
6
-52 Cleaning the Inside of Your Vehicle
6
-55 Cleaning the Outside of Your Vehicle
6
-58 GM Vehicle Care/Appearance Materials
6
-59 Vehicle Identification Number (VIN)
6
-59 Electrical System
6
-65 Replacement Bulbs
6
-66 Capacities and Specifications
6
-67 Normal Maintenance Replacement Parts
Page 192 of 321
6-9 Engine Compartment Overview
When you open the hood, this is what you will see:
A. Battery
B. Air Filter Restriction Indicator
C. Engine Air Cleaner/Filter
D. Coolant Recovery Tank
E. Radiator Pressure CapF. Engine Oil Dipstick
G. Automatic Transmission Dipstick
(If Equipped)
H. Engine Oil Fill
I. Engine Cooling FanJ. Power Steering Fluid Reservoir
K. Brake Fluid Reservoir
L. Hydraulic Clutch Fluid Reservoir
M. Windshield Washer Fluid Reservoir
N. Underhood Fuse/Relay Center
Page 198 of 321
6-15
Engine Air Cleaner/Filter
(Gasoline Engines)
Your engine air cleaner/filter is located between the
battery and coolant recovery tank.
See ªEngine Compartment Overviewº in the Index for
more information on location.
The engine air cleaner/filter
assembly has an indicator
that lets you know when
the engine air cleaner/filter
is dirty and needs to be
serviced. The indicator
is located in the air intake
tube between the engine
air cleaner/filter and
the engine.
See ªOwner Checks and Servicesº in the Index to
determine when to check the indicator.
If the area inside the clear section of the indicator is
green, no engine air cleaner/filter service is required.
When the area inside the indicator is orange and
CHANGE AIR FILTER appears, the filter should
be replaced.
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6-16
To remove the engine air cleaner/filter:
1. Unhook the retaining clips and remove the cover.
2. Lift the filter and the connected duct out of the air
cleaner/filter housing. Hold the duct and remove the
filter by both pulling and twisting the filter away
from the duct. Care should be taken to dislodge
as little dirt as possible.
3. Clean the filter sealing surface of the duct and the
filter housing.
4. Install the new filter by pushing it all the way to the
stop on the duct.5. Install the duct and the filter into the engine air
cleaner/filter housing. Make sure that the duct fits
properly into the housing.
6. Install the cover and fasten the two retaining clips.
7. After the engine air cleaner/filter is properly
serviced, the indicator should be reset. Push the
button on top of the indicator to reset it to the
green (clean) filter zone.
Refer to the Maintenance Schedule to determine when to
replace the engine air cleaner/filter. See ªOwner Checks
and Servicesº in the Index.
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6-17
CAUTION:
Operating the engine with the air cleaner/filter
off can cause you or others to be burned. The air
cleaner not only cleans the air, it stops flame if
the engine backfires. If it isn't there, and the
engine backfires, you could be burned. Don't
drive with it off, and be careful working on the
engine with the air cleaner/filter off.
NOTICE:
If the air cleaner/filter is off, a backfire can
cause a damaging engine fire. And, dirt can
easily get into your engine, which will damage it.
Always have the air cleaner/filter in place when
you're driving.
Automatic Transmission Fluid
If your vehicle has a diesel engine, see ªAutomatic
Transmission Fluidº in the Diesel Supplement.
When to Check and Change
A good time to check your automatic transmission fluid
level is when the engine oil is changed.
Change both the fluid and filter every
50,000 miles (83 000 km).
See ªScheduled Maintenance Servicesº in the Index.
How to Check
Because this operation can be a little difficult, you
may choose to have this done at the dealership
service department.
If you do it yourself, be sure to follow all the instructions
here, or you could get a false reading on the dipstick.
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6-67
Normal Maintenance
Replacement Parts
Replacement part numbers listed in this section are
based on the latest information available at the time of
printing, and are subject to change. If a part listed in this
manual is not the same as the part used in your vehicle
when it was built, or if you have any questions, please
contact your GM truck dealer.
These specifications are for information only. If you
have any questions, see the service manual for the
chassis or refer to the body manufacturer's publications.VIN Code G. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Filter* PF454. . . . . . . . . . . . . . . . . . . . . . . .
Air Cleaner Filter* A1300C . . . . . . . . . . . . . .
Spark Plugs*** TJ14R
-P15 . . . . . . . . . . . . . . .
Fuel Filter* GF626. . . . . . . . . . . . . . . . . . . . . . .
Wiper Blades** 22154886. . . . . . . . . . . . . . . . .
Wiper Blade Type Trico. . . . . . . . . . . . . . . . . .
Wiper Blade Length 18 inches (45.0 cm). . . . . .
*ACDelco
part number
**GM part number
***Denso part number
A1301C high
-capacity air cleaner filter.
Page 255 of 321

Scheduled Maintenance
7-5
Short Trip/City Definition
Follow the Short Trip/City Scheduled Maintenance if
any one of these conditions is true for your vehicle:
Most trips are less than 5 to 10 miles (8 to 16 km).
This is particularly important when outside
temperatures are below freezing.
Most trips include extensive idling (such as frequent
driving in stop
-and-go traffic).
You operate your vehicle in dusty areas or
off
-road frequently.
You frequently tow a trailer.
If the vehicle is used for delivery service, police, taxi
or other commercial application.
One of the reasons you should follow this schedule
if you operate your vehicle under any of these conditions
is that these conditions cause engine oil to break
down sooner.
Short Trip/City Intervals
Every 3,000 Miles (5 000 km): Engine Oil and Filter
Change (or 3 months, whichever occurs first). Chassis
Lubrication (or 3 months, whichever occurs first).
Rear Axle Fluid Check.
Every 6,000 Miles (10 000 km): Tire Rotation.
Every 15,000 Miles (25 000 km): Shields and
Underhood Insulation Inspection. Diesel Engine
Only: Thermostatically Controlled Engine Cooling
Fan Check (or every 12 months, whichever occurs
first). Diesel Engine Only: Air Intake System
Inspection. Front Wheel Bearing Repack
(or at each brake relining, whichever occurs first).
Every 24,000 Miles (40 000 km): Diesel Engine Only:
Fuel Cap Replacement, if driving in dusty conditions.
(Continued)