2004 GMC CANYON brake sensor

In many crashes severe enough to inate an air bag,
windshields are broken by vehicle deformation.
Additional windshield breakage may also occur from the
right front passenger air bag.
Air bags are designed to inate only once. After an
air bag inates, you will need some new parts for
your air bag system. If you do not get them, the air
bag system will not be there to help protect you
in another crash. A new system will include air bag
modules and possibly other parts. The service
manual for your vehicle covers the need to replace
other parts.
Your vehicle is equipped with electronic frontal
sensors which help the sensing system distinguish
between a moderate and a more severe frontal
impact. If your vehicle has side impact air bags,
it also has electronic side sensors. Your vehicle is
equipped with a crash sensing and diagnostic
module, which records information about the air bag
system. The module records information about
the readiness of the system and when the systemcommands air bag ination. It records the status of
the driver’s safety belt usage in a crash in which
the air bag deploys or a crash in which the air bag
nearly deploys. The module also records speed,
engine rpm, brake and throttle data.
Let only qualied technicians work on your air bag
system. Improper service can mean that your air
bag system will not work properly. See your dealer
for service.
Notice:If you damage the covering for the driver’s
or the right front passenger’s air bag, or the side
impact air bag covering on the ceiling near the side
windows, the bag may not work properly. You may
have to replace the air bag module in the steering
wheel, both the air bag module and the instrument
panel for the right front passenger’s air bag, or
side impact air bag module and ceiling covering
for the roof-mounted side impact air bag. Do not
open or break the air bag coverings.
1-69

Fuse Usage
15 Front Axle Actuator
16Antilock Brake System (ABS),
ABS module, Four-Wheel Drive,
Gravity Sensor
17Supplemental Inatable Restraint
System, Sensing and Diagnostic
Module, Air Bag Off Switch
18 Heated Seat
19Cruise Control Switch, Inside
Rearview Mirror, Transfer Case
Control Module, Brake Switch,
Clutch Disable
20 Electronic Throttle Control (ETC)
21 Power Door Locks
22 Injectors
23Ignition, Clutch Starter Switch,
Neutral Safety Back-Up Switch,
Ignition Coils 1-5, Air Conditioning
Relay
24 Transmission Solenoid
25 Powertrain Control Module (PCM)
26 Back-up Lights
27ERLS, Map Sensor, Can Purge
SolenoidFuse Usage
28 Rear Turn/Hazard Lights
29Driver’s Side RearTaillamp,
Passenger Side Air Bag Indicator
Lighting, Instrument Panel Dimming
Power (2WD/4WD switch lighting)
30 Powertrain Control Module (PCM) B
31 OnStar
32 Radio
33 Auxiliary Power 2
34 Truck Body Controller
35 Horn
36 Transfer Case Control Module
37Turn/Hazard/Courtesy/Cargo Lamps/
Mirrors
38 Cluster
39Rear Parking Lamp 1, Passenger’s
Side Taillamp, License Plate Lamps
40Front Park/Turn Lamps, Driver and
Passenger’s Side Power Window
Switches Lighting
41 Climate Control Fan
42 Power Windows
5-106

Fuse Usage
43 Starter Solenoid Relay
44
Antilock Brake System 2 (ABS Pump)
45Antilock Brake System 1 (ABS Logic)
46Power Seat Circuit Breaker/POA Seat
69 Fuel Canister Vent Solenoid
72 Not Used
73 Not Used
74 Not Used
75 Not Used
77 Air Conditioning Compressor
79 Oxygen Sensors
Relays Usage
47 Beam Selection
50 Air Conditioning Compressor
51 Fuel Pump, Fuel Pump Fuse
52 Fog Lamps
53Front Parking Lamp Fuse, Driver
and Passenger’s Taillamp Fuse,
Rear Parking Lamps
Relays Usage
54Driver and Passenger’s
Headlamps Fuse
55 Horn
56Electronic Throttle Control Fuse,
Oxygen Sensor Fuse
57 Wipers (On/Off)
58Power Window Fuse, Wiper/Washer
Switch Fuse, (Retained Accessory
Power Mode)
59Ignition 3, Climate Control,
Climate Control Head Fuse
61Run/Crank, Air Bag System Fuse,
Cruise Control Fuse, Ignition Fuse,
Back-Up Lamps, ABS Fuse, ERLS,
Front Axle, PCM-1, Injectors Fuse
62 Starter Relay (PCM Relay)
63 Wiper 2 (High/Low)
Miscellaneous Usage
64 Diode — Wiper
65 Diode — Air Conditioning, Clutch
66 Mega Fuse
67 Not Used
5-107