2003 GMC ENVOY air conditioning

Envoy XL
To operate the rear air conditioning system, the front air
conditioning system must be on. With the front air
conditioning system off, the rear system controls can
only be used to circulate air in the rear of the vehicle.
To adjust the air¯ow speed, turn the fan knob (driver
override switch), located on the ¯oor console to 1, 2
or 3. The rear mode and temperature positions
now mimic the front control system mode and passenger
side temperature.
H(Panel):When panel mode is selected in the front
controller, the rear system will distribute air from the four
headliner outlets.
)(Bi-level):When bi-level mode is selected in the
front controller, the rear system will distribute air
from the four headliner outlets and the third seat ¯oor
outlet.
6(Floor):When ¯oor mode is selected in the front
controller, the rear system will distribute air from the third
seat ¯oor outlet.
-(Defog):When defog mode is selected in the front
controller, the rear system will distribute air from the
third seat ¯oor outlet.
0(Defrost):When defrost mode is selected in the
front controller, the rear system will distribute air
from the third seat ¯oor outlet.
To activate the second row seat controls in the following
systems, set the fan knob, located on the front
console, to R.
Envoy XL
3-31

Fuses Usage
1Electrically-Controlled Air
Suspension
2Passenger's Side High-Beam
Headlamp
3Passenger's Side Low-Beam
Headlamp
4 Back-Up-Trailer Lamps
5 Driver's Side High-Beam Headlamp
6 Driver's Side Low-Beam Headlamp
7 Wash
8 Automatic Transfer Case
9 Windshield Wipers
10 Powertrain Control Module B
11 Fog Lamps
12 Stop Lamp
13 Cigarette Lighter
14 Ignition Coils
15 Air Suspension Ride
16 TBD-Ignition 1Fuses Usage
17 Crank
18 Air Bag
19 Electric Brake
20 Cooling Fan
21 Horn
22 Ignition E
23 Electronic Throttle Control
24Instrument Panel Cluster, Driver
Information Center
25 Automatic Shift Lock Control System
26 Engine 1
27 Back-Up
28 Powertrain Control Module 1
29 Oxygen Sensor
30 Air Conditioning
31 Truck Body Controller
32 Trailer
33 Anti-Lock Brakes (ABS)
5-93

Fuses Usage
34 Ignition A
35 Blower Motor
36 Ignition B
50 Passenger's Side Trailer Turn
51 Driver's Side Trailer Turn
52 Hazard Flashers
Relays Usage
37 Blank
38 Rear Window Washer
39 Fog Lamps
40 HornFuses Usage
41 Fuel Pump
42 Windshield Wipers/Washer
43 High-Beam Headlamp
44 Air Conditioning
45 Cooling Fan
46 Headlamp Driver Module
47 Starter
Miscellaneous Usage
48 Instrument Panel Battery
49 Blank
5-94

Fuses Usage
1Electrically-Controlled Air
Suspension
2Passenger's Side High-Beam
Headlamp
3Passenger's Side Low-Beam
Headlamp
4 Back-Up-Trailer Lamps
5 Driver's Side High-Beam Headlamp
6 Driver's Side Low-Beam Headlamp
7 Wash
8 Automatic Transfer Case
9 Windshield Wipers
10 Powertrain Control Module B
11 Fog Lamps
12 Stop Lamp
13 Cigarette Lighter
14 Ignition Coils
15 Cannister Vent
16 TBD-Ignition 1
17 Crank
18 Air Bag
19 Electric Brake
20 Cooling Fan
21 HornFuses Usage
22 Ignition E
23 Electronic Throttle Control
24Instrument Panel Cluster, Driver
Information Center
25 Automatic Shift Lock Control System
26 Engine 1
27 Back-Up
28 Powertrain Control Module 1
30 Air Conditioning
31 Truck Body Controller 1
32 Trailer
33 Anti-Lock Brakes (ABS)
34 Ignition A
35 Blower Motor
36 Ignition B
50 Passenger's Side Trailer Turn
51 Driver's Side Trailer Turn
52 Hazard Flashers
53 Oxygen Sensor Bank A
54 Oxygen Sensor Bank B
55 Injector Bank A
56 Injector Bank B
Relays Usage
37 Headlamp Washer
5-96

Fuses Usage
38 Rear Window Washer
39 Fog Lamps
40 Horn
41 Fuel Pump
42 Windshield Wipers/Washer
43 High-Beam Headlamp
44 Air Conditioning
45 Cooling Fan
46 Headlamp Driver Module
47 Starter
58 Ignition 1
Miscellaneous Usage
48 Instrument Panel BatteryRear Underseat Fuse Block
L6 Engine
5-97

Fuses Usage
23 Blank
24 Unlock
25 Blank
26 Blank
27 OH Battery/OnStar
žSystem
29 RainsenseŸ Wipers
30 Parking Lamps
31Truck Body Controller 4 Cruise
Control
32 Truck Body Controller 5
33 Front Wipers
34 Vehicle Stop
35 Blank
36 Heat Ventilation Air Conditioning B
37 Front Parking Lamps
38 Left Turn Signal
Fuses Usage
39 Heat Ventilation Air Conditioning 1
40 Truck Body Controller 4
41 Radio
42 Trailer Park
43 Right Turn Signal
44 Heat Ventilation Air Conditioning
45 Rear Fog Lamps
46 Auxiliary Power 1
47 Ignition 0
48 Four-Wheel Drive
49 Blank
50 Truck Body Controller Ignition
51 Brakes
52 Truck Body Controller Run
5-99

Fuses Usage
22 Retained Accessory Power
23 Blank
24 Unlock
25 Blank
26 Blank
27 OH Battery/OnStar
žSystem
28 Sunroof
29 RainsenseŸ Wipers
30 Parking Lamps
31Truck Body Controller 4 Cruise
Control
32 Truck Body Controller 5
33 Front Wipers
34 Vehicle Stop
35 Blank
36 Heat Ventilation Air Conditioning B
37 Front Parking Lamps
Fuses Usage
38 Left Turn Signal
39 Heat Ventilation Air Conditioning 1
40 Truck Body Controller 4
41 Radio
42 Trailer Park
43 Right Turn Signal
44 Heat Ventilation Air Conditioning
45 Rear Fog Lamps
46 Auxiliary Power 1
47 Ignition 0
48 Four-Wheel Drive
49 Blank
50 Truck Body Controller Ignition
51 Brakes
52 Truck Body Controller Run
5-101

Capacities and Speci®cations
Capacities and Speci®cations
Engine VIN Code Transmission Spark Plug Gap Firing Order
ªVORTECŸ º 4200 L6 S M300.042 inches
(1.07 mm)1±5-3±6±2±4
ªVORTECŸ º 5300 V8 P M300.060 inches
(1.52 mm)1±8±7±2±6±5±4±3
ApplicationL6 Engine V8 Engine
English Metric English Metric
Wheel Nut Torque 100 lb ft 140Y100 lb ft 140Y
Cooling System
Envoy 13.9 quarts 13.1 L Ð Ð
Envoy XL 15.2 quarts 14.4 L 17.9 quarts 17.0 L
Air Conditioning Refrigerant R/134a
Envoy 1.9 lbs. 0.9 kg Ð Ð
Envoy XL 2.8 lbs. 1.27 kg 2.8 lbs. 1.27 kg
Engine Oil with Filter 7.0 quarts 6.6 L 6.0 quarts 5.7 L
5-102