2005 GMC SIERRA 4WD

Vehicle* Axle Ratio Maximum Trailer Weight GCWR
4800 V8 (Manual)3.73
4.104,900 lbs (2 223 kg)
5,900 lbs (2 676 kg)10,000 lbs (4 536 kg)
11,000 lbs (4 990 kg)
5300 V83.73
4.107,900 lbs (3 583 kg)
8,900 lbs (4 037 kg)**13,000 lbs (5 897 kg)
14,000 lbs (6 350 kg)
*Fifth-wheel or gooseneck kingpin weight 15 percent to 25 percent of trailer weight up
to 1,500 lbs (680 kg) maximum.
**Maximum weight 8,900 lbs (4 036 kg) for fth-wheel and gooseneck.
Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-1500 Extended Cab Long Box (4WD)*
4800 V83.42
4.106,600 lbs (2 993 kg)
7,600 lbs (3 447 kg)**12,000 lbs (5 443 kg)
13,000 lbs (5 897 kg)
4800 V8 (Manual)3.42
4.104,600 lbs (2 087 kg)
5,600 lbs (2 540 kg)10,000 lbs (4 536 kg)
11,000 lbs (4 990 kg)
5300 V83.42
4.107,600 lbs (3 447 kg)**
8,600 lbs (3 900 kg)**13,000 lbs (5 897 kg)
14,000 lbs (6 350 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight
up to 1,500 lbs (680 kg) maximum.
**Maximum weight 6,800 lbs (3 084 kg) for fth-wheel and gooseneck.
4-76

Vehicle* Axle Ratio Maximum Trailer Weight GCWR
C-2500 Crew Cab Short Box HD (2WD)**
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 3,000 lbs (1 361 kg) maximum.
Vehicle* Axle Ratio Maximum Trailer Weight GCWR
C-2500 Crew Cab Long Box HD (2WD)
6000 V8 4.10 9,900 lbs (4 491 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 (1 361 kg) maximum.
Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-1500 HD (4WD)*
6000 V83.73
4.107,900 lbs (3 583 kg)
9,900 lbs (4 491 kg)14,000 lbs (6 350 kg)
16,000 lbs (7 257 kg)
6000 V8 w/4WS3.73
4.107,600 lbs (3 447 kg)
9,600 lbs (4 354 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 3,000 lbs (1 361 kg) maximum.
4-78

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 3,000 lbs (1 361 kg) maximum.
Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-2500 Extended Cab Short Box HD (4WD)*
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 (1 361 kg) maximum.
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)
4-79

Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-2500 Crew Cab Short Box HD (4WD)*
6000 V8 4.10 9,800 lbs (4 445 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 (1 361 kg) maximum.
Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-2500 Crew Cab Long Box HD (4WD)
6000 V8 4.10 9,600 lbs (4 354 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 3,000 lbs (1 361 kg) maximum.
Vehicle* Axle Ratio Maximum Trailer Weight GCWR
C-3500 Extended Cab (2WD)
6000 V8 4.10 9,700 lbs (4 400 kg) 16,000 lbs (7 257 kg)
8100 V8 4.10 12,000 lbs (5 443 kg)** 22,000 lbs (9 979 kg)
6.6L V8 Diesel (Manual) 3.73 12,000 lbs (5 443 kg)** 23,500 lbs (10 659 kg)
6.6L V8 Diesel (Auto) 3.73 12,000 lbs (5 443 kg) 23,500 lbs (10 659 kg)
4-80

Vehicle* Axle Ratio Maximum Trailer Weight GCWR
C-3500 Crew Cab (2WD)*
6000 V8 4.10 9,400 lbs (4 264 kg) 16,000 lbs (7 257 kg)
8100 V8 4.10 12,000 lbs (5 443 kg)** 22,000 lbs (9 979 kg)
6.6L V8 Diesel (Manual) 3.73 12,000 lbs (5 443 kg)** 22,500 lbs (10 659 kg)
6.6L V8 Diesel (Auto) 3.73 12,000 lbs (5 443 kg) 22,500 lbs (10 659 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 9,800 lbs (4 445 kg) 16,000 lbs (7 257 kg)
6000 V8 Single Rear
Wheel4.10 10,000 lbs (4 536 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
Wheel (Auto)3.73 12,000 lbs (5 443 kg) 23,500 lbs (10 659 kg)
6.6L V8 Dual Rear
Wheel (Manual)3.73 12,000 lbs (5 443 kg) 23,500 lbs (10 659 kg)
6.6L V8 Single Rear
Wheel3.73 12,000 lbs (5 443 kg) 22,000 lbs (9 979 kg)
4-81

Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-3500 Extended Cab (4WD)*
6000 V8 Dual
Rear Wheel4.10 9,400 lbs (4 264 kg) 16,000 lbs (7 257 kg)
6000 V8 Single
Rear Wheel4.10 9,600 lbs (4 354 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 Wheel (Manual)3.73 12,000 lbs (5 443 kg) 23,500 lbs (10 659 kg)
6.6L V8 Diesel Dual
Rear Wheel (Auto)3.73 12,000 lbs (5 443 kg) 23,500 lbs (10 659 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.
Vehicle* Axle Ratio Maximum Trailer Weight GCWR
K-3500 Crew Cab (4WD)*
6000 V8 Dual
Rear Wheel4.10 9,100 lbs (4 128 kg) 16,000 lbs (7 264 kg)
6000 V8 Single
Rear Wheel4.10 9,400 lbs (4 264 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)
4-82

Fuses Usage
RR WPR Not Used
SEO ACCYSpecial Equipment Option
Accessory
WS WPR Windshield Wipers
TBC ACCYTruck Body Controller
Accessory
IGN 3 Ignition, Heated Seats
Fuses Usage
4WDFour-Wheel Drive System,
Auxiliary Battery
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
5-123