Page 124 of 374

Defogging and Defrosting
Fog on the inside of windows is a result of high humidity
(moisture) condensing on the cool window glass.
This can be minimized if the climate control system is
used properly. There are two modes to clear fog or
frost from your windshield and side windows. Use the
defog mode to clear the windows of fog or moisture
and warm the passengers. Use the defrost mode
to remove fog or frost from the windshield more quickly.
For best results, clear all snow and ice from the
windshield before defrosting.
/(Floor/Defog):This mode directs half of the air to
the windshield and the side window outlets and the other
half to the oor outlets. When you select this mode,
the system runs the air-conditioning compressor unless
the outside temperature is at or below freezing.
Recirculation is not available in this mode.
0(Defrost):This mode directs most of the air to the
windshield, with some air directed to the side window
outlets and the oor outlets. When you select this mode,
the system runs the air-conditioning compressor
unless the outside temperature is at or below freezing.
Recirculation is not available in this mode.
1(Maximum Defrost):This mode directs most of
the air to the windshield, with some air directed to
the side window outlets and the oor outlets. The rear
window defogger and heated outside mirrors will turn on,
and the fan speed will be at the highest setting (5).
The temperature will be at the hottest setting also.
Recirculation is not available in this mode.
If this mode was selected when you turn your vehicle
off, the warmest temperature and highest fan speed will
be restored when the vehicle is started, regardless of
the temperature and fan setting.
Do not drive the vehicle until all the windows are clear.
3-20
Page 296 of 374

Uniform Tire Quality Grading
Quality grades can be found where applicable on the
tire sidewall between tread shoulder and maximum
section width. For example:
Treadwear 200 Traction AA Temperature A
The following information relates to the system
developed by the United States National Highway
Traffic Safety Administration, which grades tires by
treadwear, traction and temperature performance. (This
applies only to vehicles sold in the United States.)
The grades are molded on the sidewalls of most
passenger car tires. The Uniform Tire Quality Grading
system does not apply to deep tread, winter-type
snow tires, space-saver or temporary use spare tires,
tires with nominal rim diameters of 10 to 12 inches
(25 to 30 cm), or to some limited-production tires.
While the tires available on General Motors passenger
cars and light trucks may vary with respect to these
grades, they must also conform to federal safety
requirements and additional General Motors Tire
Performance Criteria (TPC) standards.
Treadwear
The treadwear grade is a comparative rating based on
the wear rate of the tire when tested under controlled
conditions on a speci ed government test course.
For example, a tire graded 150 would wear one and
a half (1.5) times as well on the government course as
a tire graded 100. The relative performance of tires
depends upon the actual conditions of their use,
however, and may depart signi cantly from the norm
due to variations in driving habits, service practices and
differences in road characteristics and climate.
Traction – AA, A, B, C
The traction grades, from highest to lowest, are AA, A,
B, and C. Those grades represent the tire’s ability
to stop on wet pavement as measured under controlled
conditions on speci ed government test surfaces of
asphalt and concrete. A tire marked C may have poor
traction performance. Warning: The traction grade
assigned to this tire is based on straight-ahead braking
traction tests, and does not include acceleration,
cornering, hydroplaning, or peak traction characteristics.
5-60
Page 305 of 374
{CAUTION:
Idling the engine in a closed-in place or with
the climate control system off can cause
deadly carbon monoxide (CO). SeeEngine
Exhaust on page 2-22.Notice:The car engine must be running to
avoid draining the battery while running the
air compressor.
3. Start your vehicle.
4. Turn the compressor on to in ate the tire.
{CAUTION:
In ating something too much can make it
explode, and you or others could be injured.
Be sure to read the in ator instructions, and
in ate the tire to its recommended pressure.
Do not exceed 36 psi (248 kPa).
5-69
Page 320 of 374
Fuses Usage
25 Blank
26 Blank
27 HomeLink
®System
28 Roof Door Module
29 Blank
31 Truck Body Controller
32 Remote Keyless Entry (RKE)
33 Windshield Wipers
34 Stoplamps
35 Blank
36Climate Control System,
Driver’s Door Unlock
37 Front Parking Lamps
38 Driver’s Side Turn Signal
39 Climate Control System
40 Truck Body Controller
41 Radio
42 Trailer Parking Lamps
43 Passenger’s Side Turn Signal
44 Blank
Fuses Usage
46 Accessory Power Outlets
47 Ignition
48 Blank
49 Blank
50 Truck Body Controller, Ignition
51 Brakes
52 Blank
Relays Usage
18 Locks
24 Unlock
30 Parking Lamps
45Rear Window Defogger,
Outside Power Heated Mirrors
Circuit
BreakersUsage
01 Roof & Door Module
02 Roof Pump
08 Power Seats
5-84
Page 322 of 374
Fuses Usage
6 Ignition
7 Driver’s Side High Beam Headlamp
8Passenger’s Side High Beam
Headlamp
9 Ignition
10Instrument Panel Cluster, Driver
Information Center (DIC)
11 Driver’s Side Low Beam Headlamp
12Passenger’s Side Low Beam
Headlamp
13 Powertrain Control Module (PCM)
14 Air Bag System
15 Truck Body Controller
16 Truck Body Control, Ignition
17 Driver’s Side Stoplamp/Turn Signals
18Passenger’s Side Stoplamp/
Turn Signals
19 Back-up Lamps
20 Throttle Actuator Control (TAC)
21 Fog LampsFuses Usage
22 Horn
23 Injector A
24 Injector B
25 Oxygen Sensor A
26 Oxygen Sensor B
27 Windshield Washer
28 Cigarette Lighter
29 Powertrain Control Module (PCM)
30 Blank
31 Cargo Cover Release
32 Hazard Warning Flashers
33 Stoplamps
44 Engine Cooling Fan
45 Climate Control Fan
46 Ignition A
47 Ignition B
48 Anti-lock Brake System (ABS)
49 Body Fuse
5-86
Page 361 of 374