Specs

Research 2020 GMC Sierra 2500HD specs for the trims available. Choose the desired trim / style from the dropdown list to see the corresponding specs.

Regular Cab Long Box 2-Wheel Drive

Brakes

Disc - Rear (Yes or ) Yes
Brake Type Pwr
Rear Drum Diam x Width (in)
Drum - Rear (Yes or )
Rear Brake Rotor Diam x Thickness (in) 13.6 x 0.79
Front Brake Rotor Diam x Thickness (in) 13 x 1.18
Brake ABS System 4-Wheel
Brake ABS System (Second Line)
Disc - Front (Yes or ) Yes

Cargo Area Dimensions

Tailgate Width (in)
Cargo Box Width @ Wheelhousings (in)
Cargo Box Width @ Floor (in) 71.4
Cargo Box Width @ Floor (in)
Cargo Box Width @ Top, Rear (in) - TBD -
Cargo Box Width @ Top, Rear (in)
Cargo Box Length @ Floor (in) 98.27
Cargo Box Length @ Floor (in)
Ext'd Cab Cargo Volume (ft³)
Cargo Volume (ft³) 83.5
Cargo Volume (ft³)
Tailgate Width (in) - TBD -
Cargo Box (Area) Height (in) 21
Cargo Box (Area) Height (in)
Cargo Box Width @ Wheelhousings (in) 50.55

Cooling System

Total Cooling System Capacity (qts) - TBD -

Electrical

Maximum Alternator Watts N/A
Maximum Alternator Capacity (amps) 170
Cold Cranking Amps @ 0° F (Primary) 730
Maximum Alternator Capacity (amps) 390
Cold Cranking Amps @ 0° F (2nd)
Maximum Alternator Capacity (amps) 220
Cold Cranking Amps @ 0° F (Primary) 720

Emissions

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

Engine

Displacement 6.6L/- TBD -
Engine Type Turbocharged Diesel V8
Engine Type Gas V8
Displacement 6.6L/403
Engine Oil Cooler - TBD -
SAE Net Torque @ RPM 464 @ 4000
SAE Net Torque @ RPM 910 @ 1600
SAE Net Horsepower @ RPM 401 @ 5200
SAE Net Horsepower @ RPM 445 @ 2800
Fuel System Direct Injection
Engine Order Code L5P
Engine Order Code L8T

Exterior Dimensions

Ground Clearance, Rear (in) 10.19
Ground Clearance, Front (in) 10.19
Frame Width, Rear (in) - TBD -
Ground to Top of Frame (in) - TBD -
Ground to Top of Load Floor (in) - TBD -
Cab to End of Frame (in) - TBD -
Cab to Axle (in) 55.2
Front Bumper to Back of Cab (in) - TBD -
Overhang, Rear w/o bumper (in) - TBD -
Overhang, Front (in) - TBD -
Height, Overall (in) 79.94
Width, Max w/o mirrors (in) 81.75
Length, Overall w/o rear bumper (in) 235.5
Wheelbase (in) 141.55

Frame

Frame Type - TBD -

Fuel Tank

Aux Fuel Tank Capacity, Approx (gal)
Fuel Tank Location - TBD -
Fuel Tank Capacity, Approx (gal) 28
Aux Fuel Tank Location
Fuel Tank Capacity, Approx (gal) 36

Interior Dimensions

Front Shoulder Room (in) 66.06
Front Leg Room (in) 44.53
Front Head Room (in) 43.11
Passenger Capacity 3
Front Hip Room (in) 60.9

Mileage

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

Steering

Steering Ratio (:1), At Lock - TBD -
Steering Ratio (:1), On Center - TBD -
Steering Type Pwr Recirculating Ball
Turning Diameter - Wall to Wall (ft) N/A
Turning Diameter - Curb to Curb (ft) 46.9

Summary

Body Style Regular Cab Pickup
Body Code ZW9
Body Code E63
Vehicle Name GMC Sierra 2500HD
Body Style Regular Cab Chassis Cab

Suspension

Axle Type - Front - TBD -
Stabilizer Bar Diameter - Rear (in)
Stabilizer Bar Diameter - Front (in) 1.38
Shock Absorber Diameter - Rear (mm) 51
Shock Absorber Diameter - Front (mm) 51
Axle Ratio (:1) - Rear 3.73
Axle Ratio (:1) - Rear 3.42
Axle Ratio (:1) - Front
Axle Capacity - Rear (lbs) - TBD -
Axle Capacity - Front (lbs) - TBD -
Axle Type - Rear - TBD -
Suspension Type - Front Torsion Bar
Suspension Type - Rear 3-Stage Leaf
Spring Capacity - Front (lbs) - TBD -
Spring Capacity - Rear (lbs) - TBD -

Tires

Rear Tire Capacity (lbs) - TBD -
Front Tire Order Code QF9
Front Tire Order Code QF6
Front Tire Order Code QXT
Front Tire Order Code QHQ
Rear Tire Order Code QF9
Rear Tire Order Code QF6
Rear Tire Order Code QXT
Rear Tire Order Code QHQ
Spare Tire Order Code
Spare Tire Order Code ZYG
Spare Tire Order Code ZXT
Spare Tire Order Code ZHQ
Front Tire Size LT275/65R20
Front Tire Size LT275/70R18E
Front Tire Size LT265/70R17E
Front Tire Size LT245/75R17E
Rear Tire Size LT275/65R20
Rear Tire Size LT275/70R18E
Rear Tire Size LT265/70R17E
Rear Tire Size LT245/75R17E
Spare Tire Size LT275/70R18
Spare Tire Size LT265/70R17E
Spare Tire Size LT245/75R17E
Front Tire Capacity (lbs) - TBD -
Spare Tire Capacity (lbs) - TBD -
Revolutions/Mile @ 45 mph - Front N/A
Revolutions/Mile @ 45 mph - Rear N/A
Revolutions/Mile @ 45 mph - Spare N/A

Trailering

Wt Distributing Hitch - Max Trailer Wt. (lbs) 14500
Dead Weight Hitch - Max Trailer Wt. (lbs)
Dead Weight Hitch - Max Trailer Wt. (lbs) 5000
Dead Weight Hitch - Max Tongue Wt. (lbs)
Dead Weight Hitch - Max Tongue Wt. (lbs) 500
Wt Distributing Hitch - Max Trailer Wt. (lbs)
Maximum Trailering Capacity (lbs) 14500
Maximum Trailering Capacity (lbs)
Fifth Wheel Hitch - Max Tongue Wt. (lbs) 4350
Fifth Wheel Hitch - Max Tongue Wt. (lbs) - TBD -
Fifth Wheel Hitch - Max Tongue Wt. (lbs) 4625
Fifth Wheel Hitch - Max Trailer Wt. (lbs) 17400
Fifth Wheel Hitch - Max Trailer Wt. (lbs) - TBD -
Fifth Wheel Hitch - Max Trailer Wt. (lbs) 18500
Wt Distributing Hitch - Max Tongue Wt. (lbs) 1450
Wt Distributing Hitch - Max Tongue Wt. (lbs)

Transmission

Trans Power Take Off Yes
Trans Power Take Off
Trans PTO Access - TBD -
Trans PTO Access
Transfer Case Model
Transfer Case Gear Ratio (:1), High
Transfer Case Gear Ratio (:1), Low
Transfer Case Power Take Off - TBD -
Transfer Case Power Take Off
Reverse Ratio (:1) 3.06
Reverse Ratio (:1) 4.54
Sixth Gear Ratio (:1) 0.67
Sixth Gear Ratio (:1) 1.26
Fifth Gear Ratio (:1) 0.85
Fifth Gear Ratio (:1) 1.48
Fourth Gear Ratio (:1) 1.15
Fourth Gear Ratio (:1) 1.72
Third Gear Ratio (:1) 1.53
Third Gear Ratio (:1) 2.06
Second Gear Ratio (:1) 2.36
Second Gear Ratio (:1) 2.87
First Gear Ratio (:1) 4.03
First Gear Ratio (:1) 4.54
Trans Description Cont. Again
Trans Description Cont. Automatic
Seventh Gear Ratio (:1) 1.00
Seventh Gear Ratio (:1)
Eighth Gear Ratio (:1) 0.85
Eighth Gear Ratio (:1)
Clutch Size (in) N/A
Ninth Gear Ratio (:1) 0.69
Ninth Gear Ratio (:1)
Tenth Gear Ratio (:1) 0.63
Tenth Gear Ratio (:1)
Drivetrain Rear Wheel Drive
Trans Type 6
Trans Type 10
Trans Order Code MYD
Trans Order Code MGU
Trans Order Code MGM

Weight Information

Gross Axle Wt Rating - Front (lbs) 4800
Gross Combined Wt Rating (lbs) 24000
Gross Combined Wt Rating (lbs) 26000
Gross Vehicle Weight Rating Cap (lbs) 9900
Gross Vehicle Weight Rating Cap (lbs) 10000
Gross Vehicle Weight Rating Cap (lbs) 10150
Gross Vehicle Weight Rating Cap (lbs) 10550
Gross Vehicle Weight Rating Cap (lbs) 10750
Curb Weight - Rear (lbs) - TBD -
Curb Weight - Front (lbs) - TBD -
Gross Axle Wt Rating - Rear (lbs) 6390
Gross Axle Wt Rating - Rear (lbs) 6600
Gross Axle Wt Rating - Rear (lbs) - TBD -
Gross Axle Wt Rating - Front (lbs) 4400

Wheels

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

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