4WD GMC SIERRA 2004 User Guide

Vehicle* Axle Ratio Maximum Trailer Weight GCWR
C-2500 Crew Cab Short Box HD (2WD)**
6000 V8 4.10 10,000 lbs. (4 536 kg) 16,000 lbs. (7 257 kg)
8100 V83.73
4.1012,000 lbs. (5 443 kg)
12,000 lbs. (5 443 kg)20,000 lbs. (9 072 kg)
22,000 lbs. (9 979 kg)
6.6L V8 Diesel 3.73 12,000 lbs. (5 443 kg) 22,000 lbs. (9 979 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 2,500 lbs.
(1 133 kg) maximum.
Vehicle* Axle Ratio Maximum Trailer Weight GCWR
C-2500 Crew Cab Long Box HD (2WD)
6000 V8 4.10 10,000 lbs. (4 536 kg) 16,000 lbs. (7 257 kg)
8100 V83.73
4.1012,000 lbs. (5 443 kg)
12,000 lbs. (5 443 kg)20,000 lbs. (9 072 kg)
22,000 lbs. (9 979 kg)
6.6L V8 Diesel 3.73 12,000 lbs. (5 443 kg)** 22,000 lbs. (9 979 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,000 lbs.
(1 360 kg) maximum.
Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-2500 LD (4WD)*
6000 V83.73
4.108,300 lbs. (3 765 kg)
10,300 lbs. (4 672 kg)14,000 lbs. (6 350 kg)
16,000 lbs. (7 257 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 2,500 lbs.
(1 133 kg) maximum.
4-81

Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-2500 Regular Cab Long Box HD (4WD)*
6000 V8 4.10 10,300 lbs. (4 672 kg) 16,000 lbs. (7 257 kg)
8100 V83.73
4.1012,000 lbs. (5 443 kg)
12,000 lbs. (5 443 kg)20,000 lbs. (9 072 kg)
22,000 lbs. (9 979 kg)
6.6L V8 Diesel 3.73 12,000 lbs. (5 443 kg) 22,000 lbs. (9 979 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 2,500 lbs.
(1 133 kg) maximum.
Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-2500 Extended Cab Short Box HD (4WD)*
6000 V8 4.10 10,100 lbs. (4 581 kg) 16,000 lbs. (7 257 kg)
8100 V83.73
4.1012,000 lbs. (5 443 kg)
12,000 lbs. (5 443 kg)20,000 lbs. (9 072 kg)
22,000 lbs. (9 979 kg)
6.6L V8 Diesel 3.73 12,000 lbs. (5 443 kg) 22,000 lbs. (9 979 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 2,500 lbs.
(1 133 kg) maximum.
4-82

Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-2500 Extended Cab Long Box HD (4WD)**
6000 V8 4.10 9,900 lbs. (4 490 kg) 16,000 lbs. (7 257 kg)
8100 V83.73
4.1012,000 lbs. (5 443 kg)
12,000 lbs. (5 443 kg)20,000 lbs. (9 072 kg)
22,000 lbs. (9 979 kg)
6.6L V8 Diesel 3.73 12,000 lbs. (5 443 kg) 22,000 lbs. (9 979 kg)
K-2500 Crew Cab Short Box HD (4WD)*
6000 V8 4.10 9,900 lbs. (4 490 kg) 16,000 lbs. (7 257 kg)
8100 V83.73
4.1012,000 lbs. (5 443 kg)
12,000 lbs. (5 443 kg)20,000 lbs. (9 072 kg)
22,000 lbs. (9 979 kg)
6.6L V8 Diesel 3.73 12,000 lbs. (5 443 kg) 22,000 lbs. (9 979 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 2,500 lbs.
(1 133 kg) maximum.
Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-2500 Crew Cab Long Box HD (4WD)
6000 V8 4.10 9,700 lbs. (4 399 kg) 16,000 lbs. (7 257 kg)
8100 V83.73
4.1012,000 lbs. (5 443kg)
12,000 lbs. (5 443kg)20,000 lbs. (9 072 kg)
22,000 lbs. (9 979 kg)
6.6L V8 Diesel 3.73 12,000 lbs. (5 443kg) 22,000 lbs. (9 979 kg)
* Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 2,500 lbs.
(1 133 kg) maximum.
4-83

Vehicle* Axle Ratio Maximum Trailer Weight GCWR
C-3500 Extended Cab (2WD)
6000 V8 4.10 9,800 lbs. (4 445 kg) 16,000 lbs. (7 257 kg)
8100 V8 4.10 15,400 lbs. (6 985 kg)** 22,000 lbs. (9 979 kg)
6.6L V8 Diesel 3.73 15,200 lbs. (6 894 kg)** 22,000 lbs. (9 979 kg)
C-3500 Crew Cab (2WD)*
6000 V8 4.10 9,600 lbs. (4 354 kg) 16,000 lbs. (7 257 kg)
8100 V8 4.10 15,200 lbs. (6 894 kg)** 22,000 lbs. (9 979 kg)
6.6L V8 Diesel 3.73 15,000 lbs. (6 803 kg)** 22,000 lbs. (9 979 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,500 lbs.
(1 587 kg) maximum.
** Limited to 12,000 lbs. (5 443 kg) with weight distributing hitch.
Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-3500 Regular Cab (4WD)
6000 V8 Dual Rear
Wheel4.10 9,900 lbs. (4 490 kg) 16,000 lbs. (7 257 kg)
6000 V8 Single Rear
Wheel4.10 10,100 lbs. (4 581 kg) 16,000 lbs. (7 257 kg)
8100 V8 Dual Rear
Wheel4.10 12,000 lbs. (5 443 kg) 22,000 lbs. (9 979 kg)
8100 V8 Single Rear
Wheel4.10 12,000 lbs. (5 443 kg) 22,000 lbs. (9 979 kg)
6.6L V8 Dual Rear
Wheel3.73 12,000 lbs. (5 443 kg) 22,000 lbs. (9 979 kg)
4-84

Vehicle* Axle Ratio Maximum Trailer Weight GCWR
6.6L V8 Single Rear
Wheel3.73 12,000 lbs. (5 443 kg) 22,000 lbs. (9 979 kg)
K-3500 Extended Cab (4WD)*
6000 V8 Dual Rear
Wheel4.10 9,500 lbs. (4 309 kg) 16,000 lbs. (7 257 kg)
6000 V8 Single Rear
Wheel4.10 9,700 lbs. (4 399 kg) 16,000 lbs. (7 257 kg)
8100 V8 Dual Rear
Wheel4.10 12,000 lbs. (5 443 kg) 22,000 lbs. (9 979 kg)
8100 V8 Single Rear
Wheel4.10 12,000 lbs. (5 443 kg) 22,000 lbs. (9 979 kg)
6.6L V8 Diesel Dual
Rear Wheel3.73 12,000 lbs. (5 443 kg) 22,000 lbs. (9 979 kg)
6.6L V8 Diesel Single
Rear Wheel3.73 12,000 lbs. (5 443 kg) 22,000 lbs. (9 979 kg)
* Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,500 lbs.
(1 587 kg) maximum.
4-85

Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-3500 Crew Cab (4WD)*
6000 V8 Dual Rear
Wheel4.10 9,300 lbs. (4 218 kg) 16,000 lbs. (7 264 kg)
6000 V8 Single Rear
Wheel4.10 9,500 lbs. (4 309 kg) 16,000 lbs. (7 264 kg)
8100 V8 Dual Rear
Wheel4.10 12,000 lbs. (5 443 kg) 22,000 lbs. (9 979 kg)
6.6L V8 Diesel Single
Rear Wheel3.73 12,000 lbs. (5 443 kg) 22,000 lbs. (9 979 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,500 lbs.
(1 587 kg) maximum.
The Gross Combination Weight Rating (GCWR) is the
total allowable weight of the completely loaded
vehicle and trailer including any passengers, cargo,
equipment and conversions. The GCWR for your vehicle
should not be exceeded.
You can ask your dealer for our trailering information or
advice, or you can write us at the address listed in
your Warranty and Owner Assistance Information
Booklet.In Canada, write to:
General Motors of Canada Limited
Customer Communications Centre, 163-005
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7
4-86

Fuses Usage
RR Wiper Not Used
SEO ACCYSpecial Equipment Option
Accessory
WS WPR Windshield Wipers
TBC ACCYTruck Body Controller
Accessory
IGN 3 Ignition, Heated Seats
4WDFour-Wheel Drive System,
Auxiliary Battery
Fuses Usage
HTR A/C Climate Control System
LOCK (Relay)Power Door Lock Relay
(Lock Function)
HVAC 1 Climate Control System
L DOORDriver's Door Harness
Connection
CRUISECruise Control, Power Take
Off (PTO)
UNLOCK (Relay)Power Door Lock Relay
(Unlock Function)
RR FOG LP Not Used
BRAKE Anti-Lock Brake System
DRIVER UNLOCKPower Door Lock Relay
(Driver's Door Unlock
Function)
IGN 0 TCM
TBC IGN 0 Truck Body Controller
VEH CHMSLVehicle and Trailer High
Mounted Stoplamp
LT TRLR ST/TRN Left Turn Signal/Stop Trailer
LT TRNLeft Turn Signals and
Sidemarkers
VEH STOPVehicle Stoplamps, Brake
Module, Electronic Throttle
Control Module
RT TRLR ST/TRN Right Turn Signal/Stop Trailer
5-127

Safety Belts (cont.)
Driver Position............................................1-16
How to Wear Safety Belts Properly................1-16
Questions and Answers About Safety Belts.....1-15
Rear Safety Belt Comfort Guides for Children
and Small Adults......................................1-30
Rear Seat Passengers.................................1-27
Right Front Passenger Position......................1-25
Safety Belt Extender....................................1-32
Safety Belt Use During Pregnancy.................1-24
Safety Belts Are for Everyone.......................1-11
Safety Chains.................................................4-90
Safety Warnings and Symbols.............................. iii
Scanning the Terrain.......................................4-25
Scheduled Maintenance..................................... 6-4
Seatback Latches............................................. 1-8
Seats
Head Restraints............................................ 1-8
Heated Seats............................................... 1-6
Manual........................................................ 1-3
Memory.....................................................2-69
Power Lumbar.............................................. 1-5
Power Seats................................................. 1-4
Rear Seat Operation...................................... 1-9
Reclining Seatbacks...................................... 1-6
Seatback Latches.......................................... 1-8
Secondary Latch System................................5-112
Securing a Child Restraint
Center Front Seat Position............................1-60
Center Rear Seat Position............................1-58Securing a Child Restraint (cont.)
Designed for the LATCH System...........1-50, 1-51
Rear Outside Seat Position...........................1-55
Security While You Travel.................................. 7-6
Select Button.................................................3-66
Service........................................................... 5-3
Adding Equipment to the Outside of Your
Vehicle..................................................... 5-4
Doing Your Own Work................................... 5-3
Engine Soon Light.......................................3-49
Publications Ordering Information...................7-12
SERVICE 4 WHEEL STEER.............................3-71
SERVICE 4WD...............................................3-71
SERVICE AIRBAG..........................................3-70
SERVICE BRAKE BOOSTER...........................3-70
SERVICE BRAKE SYSTEM.............................3-70
Service Bulletins.............................................7-12
Service Manuals.............................................7-12
SERVICE RIDE CONTROL..............................3-71
Setting Preset PTYs (RDS Only).....3-81, 3-93, 3-106
Setting Preset Stations..........3-75, 3-79, 3-90, 3-104
Setting the Time
Radios with Radio Data Systems (RDS).........3-74
Radios without Radio Data Systems (RDS).....3-74
Setting the Tone
(Bass/Treble)....................3-75, 3-79, 3-91, 3-104
Sheet Metal Damage.....................................5-122
Shift Speeds..................................................2-34
Shifting Into Park (P).......................................2-49
Shifting Out of Park (P)...................................2-51
14