Page 258 of 402

Downloaded from www.Manualslib.com manuals search engine Adding Equipment to the Outside of
Your Vehicle
Things you might add to the outside of your vehicle can
affect the airflow around
it. This may cause wind noise
and affect windshield washer performance. Check with
your
GM dealer before adding equipment to the outside
of your vehicle.
Fuel
Use regular unleaded gasoline rated at 87 octane or
higher.
At a minimum, it should meet specifications
ASTM
D48 14 in the United States and CGSB 3.5-M93
in Canada. Improved gasoline specifications have been
developed by the American Automobile Manufacturers
Association
( AAMA) for better vehicle performance
and engine protection. Gasolines meeting the AAMA
specification
could provide improved driveability and
emission
control system protection compared to
other ga~)l i nes.
Be SCII-~ the pos~cl octane is at least 87. If the octane is
less than 87. you ma, gct a heavy knocking noise when
YOLI driirc. If’ it‘ hac1 crlough. it can damage your engine. If
you’re using fuel rated at
87 octane or higher and you
still hear heavy knocking, your engine needs service.
But don’t worry if you hear a little pinging noise when
you’re accelerating or driving up a hill. That’s normal,
and
you don’t have to buy a higher octane fuel to get rid
of pinging. It’s the heavy, constant knock that means
you have a problem.
If your vehicle
is certified to meet California Emission
Standards (indicated on the underhood tune-up label),
it
is designed to operate on fuels that meet California
specifications. If such fuels are
not available in states
adopting California emissions standards, your vehicle
will operate satisfactorily
on fuels meeting federal
specifications, but emission control system performance
may be affected. The malfunction indicator lamp
on
your instrument panel may turn on and/or your vehicle
may fail a smog-check test.
If this occurs, return to your
authorized GM dealer for diagnosis to determine the
cause of failure.
In the event it is determined that the
cause of the condition is the type of fuels used, repairs
may
not be covered by your warranty.
6-3
Page 261 of 402

Downloaded from www.Manualslib.com manuals search engine Be careful not to spill gasoline. Clean gasoline from
painted surfaces as soon as possible. See "Cleaning the
Outside
of Your Vehicle" in the Index.
When you
put the cap back on, turn it to the right
(clockwise)
until you hear a clicking sound. Make sure
you fully install the cap. The diagnostic system can
determine
if the fuel cap has been left off or improperly
installed. This would allow fuel
to evaporate into the
atmosphere. See "Malfunction Indicator Lamp"
in
the Index.
NOTICE:
If you need a new cap, be sure to get the right
type. Your dealer
can get one for you. If you get
the wrong type, it may not
fit properly. This may
cause your malfunction indicator lamp to light and your fuel tank and emissions system may be
damaged. See "Malfunction Indicator Lamp"
in
the Index.
Checking Things Under the Hood
1
To open the hood, first pull
the handle inside the vehicle
on the lower driver's side of
the instrument panel.
Then
go to the front of the vehicle and release the
secondary hood release.
6-6
Page 318 of 402

Downloaded from www.Manualslib.com manuals search engine Capacities and Specifications
Engine Description ............ “VORTEC” 4300
Type .................................... V6
VINCode
................................. W
Firing Order ...................... 1-6-5-4-3-2
Horsepower ................... 190 at 4,400 rpm
Thermostat Specification
........... 195°F (91°C)
Spark Plug Gap
.......... 0.045 inches (0.114 cm)
Wheels and Tires
Wheel Nut Torque ............ 95 Ib-ft (130 N-m)
Tire Pressure
...... See the Certificationflire label. See “Loading Your
Vehicle” in
the Index.
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.
Thermostat
......................... 12551472
Oil Filter
............................... PF52
Air Cleaner Filter
...................... A1 163C
PCV Valve
.......................... CV746C
Automatic Transmission Filter Kit
...... 24200796
Spark Plugs .......................... .4 1-932
Fuel Filter
............................. GF48 1
Front Windshield Wiper Blade
.......... Trico (20 inches/50.8 cm)
Backglass Wiper Blade
... Trico (14 inched35.6 cm)
6-63