Page 141 of 356

2-88 Voltmeter
You can read the battery
voltage on your voltmeter.
If it reads less than 11 volts
or more than 16 volts while
your engine is running, and
it stays there, you may have
a problem with the
electrical charging system.
Have it checked right away. Driving with the voltmeter
reading in a warning zone could drain your battery.
If you idle your engine for a while, the voltmeter reading
might move into the low voltage zone (indicated by red dots).
If the reading stays in the low voltage zone while you are
driving, you may have a problem with the electrical charging
system. Have it checked. While the voltmeter reads in the
low voltage zone, your battery may not be able to power
certain electrical accessories, like ABS. (If this happens, the
ABS INOP light will come on. See ªAnti
-Lock Brake
System Warning Lightº in the Index.)
If you must drive a short distance with the voltmeter
reading in a warning zone, turn off all your accessories,
including your air conditioning and audio system.
Brake System Warning Light
Your vehicle's hydraulic brake system is divided into
two parts. If one part isn't working, the other part can
still work and stop you. For good braking, though, you
need both parts working well.
If the warning light comes on, there is a brake problem.
Have your brake system inspected right away.
United States Canada
This light should come on briefly when you turn the
ignition key to RUN. If it doesn't come on then, have it
fixed so it will be ready to warn you if there's a problem.
Page 154 of 356

3-2
Comfort Controls
With this system you can control the heating, air
conditioning and ventilation in your vehicle.
Your vehicle also has the flow
-through ventilation
system described later in this section.
Fan Knob
The knob on the left of the control panel is used to select
the force of air. Turn the knob clockwise to increase fan
speed and counterclockwise to decrease fan speed.Temperature Knob
Turn the center knob to change the temperature of the
air flowing from the system. Turn it toward the red area
(clockwise) for warmer air and toward the blue area
(counterclockwise) for cooler air.
Mode Knob
OFF: In this setting the system is off.
MAX (Maximum): This setting provides maximum
cooling for quick cool
-down on very hot days. It
recirculates most of the air inside your vehicle. If it is
used for long periods of time, the air may become dry.
This setting directs air through the upper air vents.
A/C (Air Conditioning): Use A/C for normal cooling
on hot days. This setting cools outside air and directs it
through the upper air vents.
The air conditioner compressor operates in MAX,
A/C, bi
-level, blend and defrost when the outside
temperature is above freezing. When the air conditioner
is on, you may sometimes notice slight changes in your
vehicle's engine speed and power due to the operation of
the compressor.
Page 315 of 356
6-69
Fuse and Relay Center 2
Fuse Usage
INJ
-2 Fuel Injectors (Not Used for V6)
(LH Injectors for V8 and
Ignition Module)
INJ
-1 Fuel Injectors (All for V6)
(RH Injectors for V8 and
Ignition Module)Fuse Usage
ENG SEN Mass Air Flow, Heated Oxygen
Sensor, Skip Shift Solenoid (V8
Only), Reverse Lockout Solenoid,
Brake Switch
STRTR Powertrain Control Module
(PCM) and Clutch Pedal Switch
ABS IGN Anti
-Lock Brake System Module
PCM IGN Powertrain Control
Module (PCM)
ETC Electronic Throttle
Control (V6 Only)
ENG CTRL Ignition Module (V6 Only),
Automatic Transmission and
Charcoal Canister Purge Solenoid
A/C CRUISE Air Conditioning Compressor
Relay, Cruise Control Switches
and Module
ENG CTRL Engine Controls, Fuel Pump,
Powertrain Control Module
(PCM), A.I.R. and Cooling Fans
Page 316 of 356
6-70
Fuse Usage
I/P
-1 HVAC Blower Control and Relay
IGN Ignition Switch, Relay and Starter
Enable Relay
I/P
-2 Instrument Panel Fuse Center
Relay Description
Blank Not Used
AIR PUMP Air Pump
A/C COMP Air Conditioning Compressor
FUEL PUMP Fuel Pump
STARTER Starter
IGN Engine Controls, Cruise Control,
Air Conditioning
Replacement Bulbs
Back-Up3155 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Center High
-Mounted Stoplamp921 . . . . . . . . . . .
Front Parking and Turn Signal3157 K . . . . . . . . .
Headlamps
Low Beam 9006. . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Beam 9005. . . . . . . . . . . . . . . . . . . . . . . . . . .
Taillamps Only194 . . . . . . . . . . . . . . . . . . . . . . . . . .
Tail/Stop/Turn Lamps3057 . . . . . . . . . . . . . . . . . . .
For any bulb not listed here contact your dealer.
Page 318 of 356

6-72
Air Conditioning
Refrigerant Capacity
If you do your own service work, you'll need the proper
service manual. See ªDoing Your Own Service Workº in
the Index for additional information. It is recommended
that service work on your air conditioning system be
performed by a qualified technician.
Air Conditioning R
-134a 1.5 lbs (0.68 kg) . . . . . . . .
Use Refrigerant Oil, R134a Systems
Normal Maintenance
Replacement Parts
Engine Air Cleaner/FilterA917C* . . . . . . . . . . . . . .
Engine Oil Filter
3800 V6 PF47*. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.7L V8 PF44*. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Filter
3800 V6 G627*. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.7L V8 GF578*. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spark Plug
3800 V6 41
-921 (0.060 inch gap)* . . . . . . . . . . . . . .
5.7L V8 41
-974 (0.060 inch gap)* . . . . . . . . . . . . . .
Windshield Wiper Blade Replacement
Type Hook. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Length 24.0 inches (60.1 cm). . . . . . . . . . . . . . . . . .
*ACDelco
part number.
Page 340 of 356

7-22 Engine Cooling System Inspection
Inspect the hoses and have them replaced if they are
cracked, swollen or deteriorated. Inspect all pipes,
fittings and clamps; replace as needed. Clean the outside
of the radiator and air conditioning condenser. To help
ensure proper operation, a pressure test of the cooling
system and pressure cap is recommended at least once
a year.
Throttle System Inspection
(Except 3800 Series V6 Engine)
Inspect the throttle system for interference or binding,
and for damaged or missing parts. Replace parts as
needed. Replace any components that have high effort
or excessive wear. Do not lubricate accelerator and
cruise control cables.
Rear Axle Service
Check the gear lubricant level in the rear axle and add
if needed. See ªRear Axleº in the Index. A fluid loss
may indicate a problem. Check the axle and repair it
if needed.
Brake System Inspection
Inspect the complete system. Inspect brake lines and
hoses for proper hook
-up, binding, leaks, cracks,
chafing, etc. Inspect disc brake pads for wear and rotors
for surface condition. Inspect other brake parts,
including calipers, parking brake, etc. Check parking
brake adjustment. You may need to have your brakes
inspected more often if your driving habits or conditions
result in frequent braking.