Specs

Research 2012 GMC Sierra 2500HD specs for the trims available. Choose the desired trim / style from the dropdown list to see the corresponding specs.

Work Truck Regular Cab Long Box 2-Wheel Drive Work Truck

Brakes

Rear Drum Diam x Width (in)
Brake Type Pwr
Brake ABS System 4-Wheel
Brake ABS System (Second Line)
Disc - Front (Yes or ) Yes
Disc - Rear (Yes or ) Yes
Front Brake Rotor Diam x Thickness (in) 13.8 x 1.57
Rear Brake Rotor Diam x Thickness (in) 14.17 x 1.34
Drum - Rear (Yes or )

Cargo Area Dimensions

Cargo Volume (ft³) 75.5
Tailgate Width (in) 61.6
Tailgate Width (in)
Cargo Box (Area) Height (in) 21.0
Cargo Box (Area) Height (in)
Cargo Box Width @ Wheelhousings (in) 50.6
Cargo Box Width @ Wheelhousings (in)
Cargo Box Width @ Floor (in) 62.5
Cargo Box Width @ Floor (in)
Cargo Box Width @ Top, Rear (in) - TBD -
Cargo Box Width @ Top, Rear (in)
Cargo Box Length @ Floor (in) 97.8
Cargo Box Length @ Floor (in)
Ext'd Cab Cargo Volume (ft³)
Cargo Volume (ft³)

Cooling System

Total Cooling System Capacity (qts) 25.4
Total Cooling System Capacity (qts) 16.4

Electrical

Cold Cranking Amps @ 0° F (2nd) 730
Cold Cranking Amps @ 0° F (2nd) 600
Cold Cranking Amps @ 0° F (Primary) 600
Maximum Alternator Capacity (amps) 2 @ 125
Maximum Alternator Capacity (amps) 125
Maximum Alternator Watts
Maximum Alternator Capacity (amps) 160
Cold Cranking Amps @ 0° F (2nd)
Cold Cranking Amps @ 0° F (Primary) 730

Emissions

Tons/yr of CO2 Emissions @ 15K mi/year - TBD -

Engine

SAE Net Torque @ RPM 380 @ 4200
Engine Order Code LGH
Engine Order Code LML
Engine Oil Cooler Yes
Engine Order Code L96
Engine Type Turbocharged Diesel V8
Engine Type Gas V8
Displacement 6.6L/403
Displacement 6.0L/366
Fuel System Direct Injection
Fuel System Electronic Fuel Injection
SAE Net Horsepower @ RPM 397 @ 3000
SAE Net Horsepower @ RPM 335 @ 3100
SAE Net Horsepower @ RPM 322 @ 4400
SAE Net Horsepower @ RPM 360 @ 5400
SAE Net Torque @ RPM 765 @ 1600
SAE Net Torque @ RPM 685 @ 1600

Exterior Dimensions

Wheelbase (in) 133.7
Width, Max w/o mirrors (in) 80.0
Length, Overall w/o rear bumper (in) 225.0
Height, Overall (in) 77.6
Overhang, Front (in) 38.8
Overhang, Rear w/o bumper (in) 52.6
Front Bumper to Back of Cab (in) 116.5
Cab to Axle (in) 56.0
Cab to End of Frame (in) - TBD -
Ground to Top of Load Floor (in)
Ground to Top of Load Floor (in) 38.7
Ground to Top of Frame (in) - TBD -
Frame Width, Rear (in) - TBD -
Ground Clearance, Front (in) 9.8
Ground Clearance, Rear (in) 9.1

Frame

Frame Type Hydroformed

Fuel Tank

Fuel Tank Location - TBD -
Aux Fuel Tank Location
Fuel Tank Capacity, Approx (gal) 36
Aux Fuel Tank Capacity, Approx (gal)

Interior Dimensions

Front Hip Room (in) 60.3
Passenger Capacity 2
Front Shoulder Room (in) 65.2
Front Leg Room (in) 41.3
Front Head Room (in) 41.3
Passenger Capacity 3

Mileage

EPA Fuel Economy Est - City (MPG)
Fuel Economy Est-Combined (MPG)
EPA Fuel Economy Est - Hwy (MPG)

Steering

Steering Ratio (:1), On Center 24
Steering Type Pwr
Steering Ratio (:1), At Lock 3.57
Turning Diameter - Wall to Wall (ft) - TBD -
Turning Diameter - Curb to Curb (ft) 44.9

Summary

Vehicle Name GMC Sierra 2500HD
Body Style Reg Cab
Body Style Reg Cab 8' Fleetside
Body Code ZW9
Body Code E63

Suspension

Spring Capacity - Front (lbs) 4400
Spring Capacity - Rear (lbs) 6200
Axle Type - Front Independent
Axle Type - Rear Semi Floating
Axle Capacity - Front (lbs) 4800
Suspension Type - Front Independent
Suspension Type - Rear Multi-Leaf
Axle Capacity - Front (lbs) 4400
Axle Capacity - Rear (lbs) 6200
Axle Ratio (:1) - Front
Axle Ratio (:1) - Rear 4.10
Axle Ratio (:1) - Rear 3.73
Shock Absorber Diameter - Front (mm) 35
Shock Absorber Diameter - Rear (mm) 35
Stabilizer Bar Diameter - Front (in) 1.42
Stabilizer Bar Diameter - Front (in) 1.31
Stabilizer Bar Diameter - Rear (in)
Spring Capacity - Front (lbs) 4800

Tires

Spare Tire Capacity (lbs) - TBD -
Front Tire Order Code QGM
Front Tire Order Code QWF
Front Tire Order Code QFC
Front Tire Order Code QXT
Front Tire Order Code QHQ
Rear Tire Order Code QGM
Rear Tire Size LT245/75R17
Spare Tire Size LT245/75R17E
Spare Tire Size LT265/70R17E
Spare Tire Size LT265/70R18E
Spare Tire Size
Front Tire Capacity (lbs) 2860
Front Tire Capacity (lbs) 2760
Front Tire Capacity (lbs) 2580
Rear Tire Capacity (lbs) 3185
Rear Tire Capacity (lbs) 3100
Rear Tire Capacity (lbs) 3195
Revolutions/Mile @ 45 mph - Front - TBD -
Revolutions/Mile @ 45 mph - Rear - TBD -
Revolutions/Mile @ 45 mph - Spare
Revolutions/Mile @ 45 mph - Spare
Revolutions/Mile @ 45 mph - Spare - TBD -
Rear Tire Order Code QWF
Rear Tire Order Code QFC
Rear Tire Order Code QXT
Rear Tire Order Code QHQ
Spare Tire Order Code ZHQ
Spare Tire Order Code ZXT
Spare Tire Order Code ZGM
Spare Tire Order Code
Front Tire Size LT265/70R18E
Front Tire Size LT265/60R20E
Front Tire Size LT265/70R17E
Front Tire Size LT245/75R17
Rear Tire Size LT265/70R18E
Rear Tire Size LT265/60R20E
Rear Tire Size LT265/70R17E

Trailering

Maximum Trailering Capacity (lbs) 10000
Maximum Trailering Capacity (lbs) - TBD -
Fifth Wheel Hitch - Max Tongue Wt. (lbs) 4450
Fifth Wheel Hitch - Max Tongue Wt. (lbs) 3675
Fifth Wheel Hitch - Max Tongue Wt. (lbs) 2550
Maximum Trailering Capacity (lbs) 14700
Dead Weight Hitch - Max Trailer Wt. (lbs) 5000
Dead Weight Hitch - Max Tongue Wt. (lbs) 500
Wt Distributing Hitch - Max Trailer Wt. (lbs) 13000
Wt Distributing Hitch - Max Trailer Wt. (lbs) 10200
Wt Distributing Hitch - Max Tongue Wt. (lbs) 1950
Wt Distributing Hitch - Max Tongue Wt. (lbs) 1530
Fifth Wheel Hitch - Max Trailer Wt. (lbs) 17800
Fifth Wheel Hitch - Max Trailer Wt. (lbs) 14700
Maximum Trailering Capacity (lbs) 17800
Fifth Wheel Hitch - Max Trailer Wt. (lbs) 10200

Transmission

Drivetrain Rear Wheel Drive
Transfer Case Gear Ratio (:1), Low
Transfer Case Gear Ratio (:1), High
Transfer Case Model
Trans PTO Access
Trans Power Take Off
Clutch Size (in)
Reverse Ratio (:1) 3.06
Reverse Ratio (:1) 4.49
Sixth Gear Ratio (:1) 0.67
Sixth Gear Ratio (:1) 0.61
Fifth Gear Ratio (:1) 0.85
Fifth Gear Ratio (:1) 0.71
Fourth Gear Ratio (:1) 1.15
Fourth Gear Ratio (:1) 1.00
Third Gear Ratio (:1) 1.53
Third Gear Ratio (:1) 1.41
Second Gear Ratio (:1) 2.36
Second Gear Ratio (:1) 1.81
First Gear Ratio (:1) 4.03
First Gear Ratio (:1) 3.10
Trans Description Cont. Again
Trans Description Cont. HD Automatic
Trans Description Cont. Automatic
Trans Type 6
Trans Order Code MYD
Trans Order Code MW7
Transfer Case Power Take Off

Weight Information

Gross Combined Wt Rating (lbs) 20500
Gross Combined Wt Rating (lbs) 24500
Gross Vehicle Weight Rating Cap (lbs) 9300
Gross Vehicle Weight Rating Cap (lbs) 9900
Gross Vehicle Weight Rating Cap (lbs) 10000
Curb Weight - Rear (lbs) 2421
Curb Weight - Front (lbs) 3209
Gross Axle Wt Rating - Rear (lbs) 6200
Gross Axle Wt Rating - Front (lbs) 4400
Gross Axle Wt Rating - Front (lbs) 4800
Gross Combined Wt Rating (lbs) 16000

Wheels

Rear Wheel Material Steel
Spare Wheel Material Steel
Front Wheel Material Steel
Spare Wheel Size (in) 17 x 7.5
Spare Wheel Size (in) 18 x 8.0
Spare Wheel Size (in)
Rear Wheel Size (in) 17 x 7.5
Rear Wheel Size (in) 18 x 8.0
Rear Wheel Size (in) 20 x 8.5
Front Wheel Size (in) 17 x 7.5
Front Wheel Size (in) 18 x 8.0
Front Wheel Size (in) 20 x 8.5

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