Specs

Research 2012 GMC Sierra 1500 specs for the trims available. Choose the desired trim / style from the dropdown list to see the corresponding specs.

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

Brakes

Rear Brake Rotor Diam x Thickness (in)
Drum - Rear (Yes or )
Drum - Rear (Yes or ) Yes
Rear Drum Diam x Width (in)
Rear Drum Diam x Width (in) 11.6 x 2.4
Brake Type Pwr
Brake ABS System 4-Wheel
Brake ABS System (Second Line)
Disc - Front (Yes or ) Yes
Disc - Rear (Yes or ) Yes
Disc - Rear (Yes or )
Front Brake Rotor Diam x Thickness (in) 13.0 x 1.2
Rear Brake Rotor Diam x Thickness (in) - TBD -

Cargo Area Dimensions

Cargo Box Width @ Floor (in) 62.4
Cargo Box (Area) Height (in) 21.0
Cargo Box Width @ Wheelhousings (in) 50.6
Ext'd Cab Cargo Volume (ft³)
Cargo Box Width @ Top, Rear (in) 61.5
Cargo Box Length @ Floor (in) 78.7
Cargo Volume (ft³) 60.7
Tailgate Width (in) 61.5

Cooling System

Total Cooling System Capacity (qts) 14.9
Total Cooling System Capacity (qts) - TBD -
Total Cooling System Capacity (qts) 12.6
Total Cooling System Capacity (qts) 13.4

Electrical

Maximum Alternator Watts
Maximum Alternator Capacity (amps) 160
Cold Cranking Amps @ 0° F (2nd)
Cold Cranking Amps @ 0° F (Primary) 600
Cold Cranking Amps @ 0° F (Primary) 730
Maximum Alternator Capacity (amps) 145

Emissions

EPA Greenhouse Gas Score 2
Tons/yr of CO2 Emissions @ 15K mi/year 10.7
Tons/yr of CO2 Emissions @ 15K mi/year 11.5
EPA Greenhouse Gas Score 1

Engine

SAE Net Torque @ RPM 260 @ 2800
Engine Order Code LC9
Engine Order Code LMG
Engine Order Code L20
Engine Order Code LU3
Engine Type Gas/Ethanol V8
Engine Type Gas V6
Displacement 5.3L/323
Displacement 5.3L/323
Displacement 4.8L/293
Displacement 4.3L/262
Fuel System Electronic Fuel Injection
SAE Net Horsepower @ RPM 315 @ 5200
SAE Net Horsepower @ RPM 315 @ 5200
SAE Net Horsepower @ RPM 302 @ 5600
SAE Net Horsepower @ RPM 195 @ 4600
SAE Net Torque @ RPM 335 @ 4000
SAE Net Torque @ RPM 335 @ 4000
SAE Net Torque @ RPM 305 @ 4600
Engine Oil Cooler

Exterior Dimensions

Ground to Top of Frame (in) - TBD -
Frame Width, Rear (in) - TBD -
Ground Clearance, Front (in) 7.7
Ground Clearance, Rear (in) 13.4
Front Bumper to Back of Cab (in) 116.5
Cab to Axle (in) 41.9
Cab to End of Frame (in) - TBD -
Ground to Top of Load Floor (in) 34.7
Overhang, Rear w/o bumper (in) 47.2
Wheelbase (in) 119.0
Length, Overall w/o rear bumper (in) 205.6
Width, Max w/o mirrors (in) 80.0
Height, Overall (in) 73.6
Overhang, Front (in) 39.4

Frame

Frame Type Hydroformed

Fuel Tank

Aux Fuel Tank Location
Fuel Tank Location Driver Side
Aux Fuel Tank Capacity, Approx (gal)
Fuel Tank Capacity, Approx (gal) 26

Interior Dimensions

Passenger Capacity 3
Front Hip Room (in) 62.5
Front Shoulder Room (in) 65.2
Front Leg Room (in) 41.3
Front Head Room (in) 41.5

Mileage

Fuel Economy Est-Combined (MPG) 16
Fuel Economy Est-Combined (MPG) 17
EPA Fuel Economy Est - City (MPG) 14
EPA Fuel Economy Est - City (MPG) 15
EPA Fuel Economy Est - Hwy (MPG) 21
EPA Fuel Economy Est - Hwy (MPG) 19
EPA Fuel Economy Est - Hwy (MPG) 20

Steering

Steering Type Pwr
Steering Ratio (:1), On Center 16.7
Steering Ratio (:1), At Lock 3
Turning Diameter - Curb to Curb (ft) 39.7
Turning Diameter - Wall to Wall (ft) - TBD -

Summary

Body Style Reg Cab 6.5' Wideside
Body Code E63
Vehicle Name GMC Sierra 1500

Suspension

Shock Absorber Diameter - Front (mm) 1.8
Shock Absorber Diameter - Rear (mm) 1.4
Stabilizer Bar Diameter - Front (in) 1.4
Stabilizer Bar Diameter - Rear (in)
Axle Capacity - Front (lbs) 3750
Suspension Type - Front Independent
Suspension Type - Rear 2-stage multi-leaf
Spring Capacity - Front (lbs) 3200
Spring Capacity - Rear (lbs) 3950
Spring Capacity - Rear (lbs) 3750
Axle Type - Front Independent
Axle Ratio (:1) - Rear 3.08
Axle Type - Rear Semi-Floating
Axle Ratio (:1) - Rear 3.73
Axle Ratio (:1) - Rear 3.42
Axle Ratio (:1) - Front
Axle Capacity - Rear (lbs) 3750
Axle Capacity - Rear (lbs) 3950
Axle Capacity - Front (lbs) 3200
Axle Ratio (:1) - Rear 3.23

Tires

Rear Tire Size P275/55R20
Front Tire Order Code QSS
Front Tire Order Code QXR
Front Tire Order Code QU1
Rear Tire Order Code QSS
Rear Tire Order Code QXR
Rear Tire Order Code QU1
Spare Tire Order Code 4JP
Spare Tire Order Code
Front Tire Size P275/55R20
Front Tire Size LT245/70R17
Front Tire Size P245/70R17
Rear Tire Size LT245/70R17
Rear Tire Size P245/70R17
Spare Tire Size P265/70R17
Spare Tire Size LT245/70R17
Spare Tire Size P245/70R17
Front Tire Capacity (lbs) 2304
Front Tire Capacity (lbs) 2004
Front Tire Capacity (lbs) 2044
Front Tire Capacity (lbs) 2244
Front Tire Capacity (lbs) 2044
Front Tire Capacity (lbs) 2244
Front Tire Capacity (lbs) 2304
Front Tire Capacity (lbs) 2010
Front Tire Capacity (lbs) 2004
Rear Tire Capacity (lbs) 2010
Rear Tire Capacity (lbs) 2304
Spare Tire Capacity (lbs) 2304
Revolutions/Mile @ 45 mph - Front - TBD -
Revolutions/Mile @ 45 mph - Rear - TBD -
Revolutions/Mile @ 45 mph - Spare
Revolutions/Mile @ 45 mph - Spare - TBD -

Trailering

Fifth Wheel Hitch - Max Tongue Wt. (lbs)
Maximum Trailering Capacity (lbs) 9100
Dead Weight Hitch - Max Trailer Wt. (lbs) 4700
Dead Weight Hitch - Max Trailer Wt. (lbs) 4800
Dead Weight Hitch - Max Tongue Wt. (lbs) 500
Dead Weight Hitch - Max Tongue Wt. (lbs) 500
Dead Weight Hitch - Max Tongue Wt. (lbs) 470
Dead Weight Hitch - Max Tongue Wt. (lbs) 480
Wt Distributing Hitch - Max Trailer Wt. (lbs) 9100
Wt Distributing Hitch - Max Trailer Wt. (lbs) 7400
Wt Distributing Hitch - Max Trailer Wt. (lbs) 7200
Wt Distributing Hitch - Max Trailer Wt. (lbs) 4700
Dead Weight Hitch - Max Trailer Wt. (lbs) 5000
Wt Distributing Hitch - Max Trailer Wt. (lbs) 4800
Wt Distributing Hitch - Max Tongue Wt. (lbs) 1365
Wt Distributing Hitch - Max Tongue Wt. (lbs) 1110
Wt Distributing Hitch - Max Tongue Wt. (lbs) 1080
Wt Distributing Hitch - Max Tongue Wt. (lbs) 705
Wt Distributing Hitch - Max Tongue Wt. (lbs) 720
Fifth Wheel Hitch - Max Trailer Wt. (lbs) 9200
Fifth Wheel Hitch - Max Trailer Wt. (lbs)
Fifth Wheel Hitch - Max Tongue Wt. (lbs) 2300
Dead Weight Hitch - Max Trailer Wt. (lbs) 5000

Transmission

Transfer Case Model
Drivetrain Rear Wheel Drive
Third Gear Ratio (:1) 1.00
Third Gear Ratio (:1) 1.53
Second Gear Ratio (:1) 1.63
Second Gear Ratio (:1) 2.36
First Gear Ratio (:1) 3.06
First Gear Ratio (:1) 4.03
Trans Description Cont. Again
Trans Description Cont. Automatic
Trans Type 4
Trans Type 6
Trans Order Code M30
Trans Order Code MYC
Transfer Case Power Take Off
Transfer Case Gear Ratio (:1), Low
Transfer Case Gear Ratio (:1), High
Trans PTO Access
Trans Power Take Off
Clutch Size (in)
Reverse Ratio (:1) 2.29
Reverse Ratio (:1) 3.06
Sixth Gear Ratio (:1)
Sixth Gear Ratio (:1) 0.67
Fifth Gear Ratio (:1)
Fourth Gear Ratio (:1) 0.70
Fifth Gear Ratio (:1) 0.85
Fourth Gear Ratio (:1) 1.15

Weight Information

Curb Weight - Rear (lbs) 1784
Gross Vehicle Weight Rating Cap (lbs) 6800
Gross Vehicle Weight Rating Cap (lbs) 6400
Gross Combined Wt Rating (lbs) 11500
Gross Combined Wt Rating (lbs) 11000
Gross Axle Wt Rating - Front (lbs) 3200
Gross Axle Wt Rating - Rear (lbs) 3750
Gross Combined Wt Rating (lbs) 12000
Gross Combined Wt Rating (lbs) 10000
Curb Weight - Front (lbs) 2676

Wheels

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