Page 233 of 386

Downloaded from www.Manualslib.com manuals search engine I A CAUTION:
Rust or dirt on the wheel, or on the parts to
which it is fastened, can make the wheel nuts
become loose after a time. The wheel could come
off and cause an accident. When you change a
wheel, remove any rust or dirt from the places
where the wheel attaches to the vehicle. In an
emergency, you can use
a cloth or a paper towel
to do this; but be sure to use a scraper or wire
brush later, if you need to, to get all the rust or
dirt
off.
I A CAUTION: I
Never use oil or grease on studs or nuts. If you
do, the nuts might come loose. Your wheel could
fall
off, causing a serious accident.
8. Replace the wheel nuts
with the rounded end
of
the nuts toward the
wheel. Tighten each
wheel nut
by hand until
the wheel is held against
the hub.
9. Lower the vehicle by rotating the jack handle to the
left. Lower the jack completely.
1
10. Tighten the nuts
firmly in
a crisscross
sequence as shown.
Rotate the wheel
wrench to the right.
5-32
Page 283 of 386

Downloaded from www.Manualslib.com manuals search engine If your vehicle has dual rear wheels, always use one of
the correct rotation patterns shown here when rotating
your tires.
When you install dual wheels, be sure the vent holes in
the inner and outer wheels on each side are lined up.
After the tires have been rotated, adjust the front
and rear inflation pressures
as shown on the
Certificationflire label. Make certain
that all wheel
nuts are properly tightened. See “Wheel Nut Torque’’
in the Index.
A CAUTION:
Rust or dirt on a wheel, or on the parts to which
it is fastened, can make wheel nuts become loose
after
a time. The wheel could come off and cause
an accident. When you change
a wheel, remove
any rust or dirt from places where the wheel
attaches to the vehicle. In an emergency,
you can
use a cloth or a paper towel to do this; but be
sure to use a scraper or wire brush later, if you
need to, to get all the rust or dirt
off. (See
“Changing
a Flat Tire” in the Index.)
6-44
Page 306 of 386
Downloaded from www.Manualslib.com manuals search engine Capacities and Specifications
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 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.
Engine Identification -- Gasoline Engines
Engine “VORTEC” 4300 “VORTEC” 5000
Type V6 V8
VIN Code w M
Fuel System CSFI’ CSFI 1
lCentra1 Sequential Fuel Injection
2Sequential Fuel Injection
Wheel Nut Torque
MODEL TORQUE
All 140 ft-lb (190 Nem)
“VORTEC” 5700
V8
R
CSFI’
“VORTEC” 7400
V8
J
SFI~
Page 316 of 386

Downloaded from www.Manualslib.com manuals search engine Maintenance Schedule
Short Trip/City Definition -- Gasoline Engines
Follow the Short Trip/City Maintenance Schedule 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).
Most trips are through dusty areas.
You frequently tow a trailer or use a carrier on top of
If the vehicle is used for delivery service, police, taxi
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:
your vehicle.
or other commercial application.
Short Trip/City Intervals -- Gasoline Engines
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). Drive
Axle Service (or
3 months, whichever occurs first).
Every 6,000 Miles (10 000 km): Tire Rotation.
Every 15,000 Miles (25 000 km): Air Cleaner Filter
Inspection, if driving in dusty conditions. Shields and
Underhood Insulation Inspection (GVWR above
8,500 lbs. only). Front Wheel Bearing Repack (or at
each brake relining, whichever occurs first).
Every 30,000 Miles (50 000 km): Air Cleaner Filter
Replacement. Fuel Filter Replacement.
Every 50,000 Miles (83 000 km): Automatic
Transmission Service (vehicles over
8600 GVWR or
driven under severe conditions only).
7-5
Page 318 of 386

Downloaded from www.Manualslib.com manuals search engine Maintenance Schedule
Long Tripmighway Intervals -- Gasoline Engines I
Every 7,500 Miles (12 500 km): Engine Oil and Filter
Change (or every
12 months, whichever occurs first).
Chassis Lubrication (or every 12 months, whichever
occurs first). Drive Axle Service. Tire Rotation.
Every 15,000 Miles (25 000 km): Shields and
Underhood Insulation Inspection (GVWR above
8,500 lbs. only).
Replacement. Air Cleaner Filter Replacement. Front
Wheel Bearing Repack (or at each brake relining,
whichever occurs first).
Transmission Service (vehicles over
8600 GVWR or
driven under severe conditions only).
Every 30,000 Miles (50 000 km): Fuel Filter
Every 50,000 Miles (83 000 km): Automatic
Long Tripmighway Intervals -- Gasoline Engines
Every
60,000 Miles (100 000 km): Engine Accessory
Drive Belt Inspection. Fuel Tank, Cap and Lines
Inspection. Exhaust Gas Recirculation System
Inspection. Evaporative Control System Inspection.
Every 100,000 Miles (166 000 km): Spark Plug Wire
Inspection. Spark Plug Replacement. Automatic
Transmission Service (normal conditions). Positive
Crankcase Ventilation (PCV) Valve Inspection.
Every 150,000 Miles (240 000 km): Cooling System
Service (or every
60 months, whichever occurs first).
These intervals only summarize maintenance services.
Be sure
to follow the complete maintenance schedule on
the following pages.
7-7
Page 322 of 386

Downloaded from www.Manualslib.com manuals search engine I Short TripKity Maintenance Schedule -- Gasoline Engines I
0 Clean and repack the front wheel bearings (or at each brake relining,
whichever occurs first).
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 Control Service. Applicable only
to vehicles sold in the
United States.
18,000 Miles (30 000 km)
0 Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service.
0 Lubricate chassis components (or every 3 months, whichever occurs first).
0 Check axle fluid level and add fluid as needed. (See footnote **.)
0 Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
rotation pattern and additional information. (See footnote
+.)
(See footnote #.)
21,000 Miles (35 000 km)
Change engine oil and filter (or every 3 months, whichever occurs first).
0 Lubricate chassis components (or every 3 months, whichever occurs first).
0 Check axle fluid level and add fluid as needed. (See footnote **.)
An Emission Control Service.
(See footnote #.)
DATE I
MILEAGE ACTUAL I SERVICEDBY I
DATE I
SERVICED BY:
1
7-11
Page 324 of 386

Downloaded from www.Manualslib.com manuals search engine I Short Trip/City Maintenance Schedule -- Gasoline Engines I
0 Check axle fluid level and add fluid as needed. (See footnote **.)
0 Clean and repack the front wheel bearings (or at each brake relining,
whichever occurs first).
0 Replace fuel filter.
An Emission Control Service. (See footnote?.)
0 Replace air cleaner filter.
An Emission Control Service.
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 Control Service. Applicable only to vehicles sold in the
United States.
0 Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
rotation pattern and additional information. (See footnote
+.)
33,000 Miles (55 000 km)
0 Change engine oil and filter (or every 3 months, whichever occurs first).
0 Lubricate chassis components (or every 3 months, whichever occurs first).
0 Check axle fluid level and add fluid as needed. (See footnote **.)
An Emission Control Service.
(See footnote #.)
DATE I
MILEAGE
7-13
Page 326 of 386

Downloaded from www.Manualslib.com manuals search engine I Short TripKity Maintenance Schedule -- Gasoline Engines 1
0 Check axle fluid level and add fluid as needed. (See footnote **.)
Rotate tires. See “Tire Inspection and Rotation” in the Index for proper
rotation pattern and additional information. (See footnote
+.)
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 chassis components (or every 3 months, whichever occurs first).
0 Check axle fluid level and add fluid as needed. (See footnote **.)
0 Clean and repack the front wheel bearings (or at each brake relining,
0 Inspect air cleaner filter if you are driving in dusty conditions. Replace filter
(See footnote
#.)
whichever
occurs first).
if necessary.
An Emission Control Service. (See footnote?.)
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 Control Service. Applicable only to vehicles sold in the
United
States.
DATE I
7-15