Specs

Research 2003 GMC Sierra 2500HD specs for the trims available. Choose the desired trim / style from the dropdown list to see the corresponding specs.

Work Truck 2WD Regular Cab Long Box Work Truck

Brakes

Rear Drum Diam x Width (in)
Brake Type Pwr
Brake ABS System Four-Wheel
Brake ABS System (Second Line)
Disc - Front (Yes or ) Yes
Disc - Rear (Yes or ) Yes
Front Brake Rotor Diam x Thickness (in) 12.8 x 1.5
Rear Brake Rotor Diam x Thickness (in) 13.0 x 1.1
Drum - Rear (Yes or )

Cargo Area Dimensions

Cargo Box (Area) Height (in) 19.5
Cargo Box Width @ Wheelhousings (in) 50.0
Cargo Box Width @ Floor (in) 64.8
Cargo Box Width @ Top, Rear (in) 61.9
Ext'd Cab Cargo Volume (ft³)
Cargo Box Length @ Floor (in) 97.6
Cargo Volume (ft³) 70.7
Tailgate Width (in) 61.9

Cooling System

Total Cooling System Capacity (qts) 23.6
Total Cooling System Capacity (qts) 24.0
Total Cooling System Capacity (qts) 25.2
Total Cooling System Capacity (qts) 15.4

Electrical

Cold Cranking Amps @ 0° F (Primary) 770
Maximum Alternator Watts
Maximum Alternator Capacity (amps) 105
Maximum Alternator Capacity (amps) 145
Cold Cranking Amps @ 0° F (2nd)
Cold Cranking Amps @ 0° F (2nd) 770
Cold Cranking Amps @ 0° F (2nd) 600
Cold Cranking Amps @ 0° F (Primary) 600

Engine

Displacement 6.0L/364
Engine Oil Cooler Yes
SAE Net Torque @ RPM 360 @ 4000
SAE Net Torque @ RPM 520 @ 1800
SAE Net Torque @ RPM 455 @ 3200
SAE Net Horsepower @ RPM 300 @ 4400
SAE Net Horsepower @ RPM 300 @ 3100
SAE Net Horsepower @ RPM 340 @ 4200
Fuel System SFI
Fuel System Fuel Injection
Engine Order Code L18
Engine Order Code LB7
Engine Order Code LQ4
Engine Type Gas/Natural Gas V8
Engine Type Turbo-Charged Diesel V8
Engine Type Gas V8
Displacement 8.1L/494
Displacement 6.6L/402

Exterior Dimensions

Length, Overall w/o rear bumper (in) 222.1
Cab to End of Frame (in) - TBD -
Ground to Top of Load Floor (in) - TBD -
Ground to Top of Frame (in) - TBD -
Frame Width, Rear (in) - TBD -
Ground Clearance, Front (in) 9.1
Ground Clearance, Rear (in) 12.1
Cab to Axle (in) 55.9
Front Bumper to Back of Cab (in) 114.1
Overhang, Rear w/o bumper (in) 52.1
Overhang, Front (in) 37.0
Height, Overall (in) 76.2
Width, Max w/o mirrors (in) 79.7
Wheelbase (in) 133.0

Frame

Frame Type Ladder

Fuel Tank

Aux Fuel Tank Capacity, Approx (gal)
Fuel Tank Capacity, Approx (gal) 34
Fuel Tank Capacity, Approx (gal) 20
Aux Fuel Tank Location
Fuel Tank Location LH

Interior Dimensions

Front Shoulder Room (in) 65.2
Front Hip Room (in) 61.4
Passenger Capacity 3
Front Head Room (in) 41.0
Front Leg Room (in) 41.3

Mileage

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

Steering

Turning Diameter - Curb to Curb (ft) 43.8
Steering Ratio (:1), On Center - TBD -
Steering Type Pwr Recirculating Ball
Turning Diameter - Wall to Wall (ft) - TBD -
Steering Ratio (:1), At Lock - TBD -

Summary

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

Suspension

Shock Absorber Diameter - Rear (mm) 35
Suspension Type - Front Torsion Bar
Suspension Type - Rear 2-Stage Multi-Leaf
Spring Capacity - Front (lbs) 4800
Spring Capacity - Front (lbs) 4500
Spring Capacity - Rear (lbs) 6084
Axle Type - Front - TBD -
Axle Type - Rear Semi-Floating
Axle Capacity - Front (lbs) 4800
Axle Capacity - Rear (lbs) 6900
Axle Ratio (:1) - Front
Axle Ratio (:1) - Rear 4.10
Axle Ratio (:1) - Rear 3.73
Shock Absorber Diameter - Front (mm) 35
Stabilizer Bar Diameter - Front (in) 1.42
Stabilizer Bar Diameter - Rear (in)

Tires

Revolutions/Mile @ 45 mph - Front - TBD -
Spare Tire Order Code QIZ
Front Tire Size LT245/75R16
Rear Tire Size LT245/75R16
Spare Tire Size
Spare Tire Size LT245/75R16
Front Tire Capacity (lbs) 2205
Rear Tire Capacity (lbs) 3042
Spare Tire Capacity (lbs)
Spare Tire Capacity (lbs) 2205
Spare Tire Order Code
Revolutions/Mile @ 45 mph - Front - TBD -
Revolutions/Mile @ 45 mph - Rear - TBD -
Revolutions/Mile @ 45 mph - Rear - TBD -
Revolutions/Mile @ 45 mph - Spare - TBD -
Revolutions/Mile @ 45 mph - Spare
Revolutions/Mile @ 45 mph - Spare - TBD -
Front Tire Order Code QIW
Front Tire Order Code QIZ
Rear Tire Order Code QIW
Rear Tire Order Code QIZ
Spare Tire Order Code QIW
Spare Tire Order Code ZHH
Spare Tire Order Code ZGK

Trailering

Wt Distributing Hitch - Max Trailer Wt. (lbs) 4500
Wt Distributing Hitch - Max Trailer Wt. (lbs) 10600
Wt Distributing Hitch - Max Tongue Wt. (lbs) 1200
Wt Distributing Hitch - Max Tongue Wt. (lbs) 450
Wt Distributing Hitch - Max Tongue Wt. (lbs) 1060
Fifth Wheel Hitch - Max Trailer Wt. (lbs) 14100
Fifth Wheel Hitch - Max Trailer Wt. (lbs) 16100
Fifth Wheel Hitch - Max Trailer Wt. (lbs) 16000
Dead Weight Hitch - Max Trailer Wt. (lbs) 4500
Dead Weight Hitch - Max Trailer Wt. (lbs) 7500
Dead Weight Hitch - Max Tongue Wt. (lbs) 600
Fifth Wheel Hitch - Max Trailer Wt. (lbs) 10600
Fifth Wheel Hitch - Max Tongue Wt. (lbs) 2115
Fifth Wheel Hitch - Max Tongue Wt. (lbs) 2415
Fifth Wheel Hitch - Max Tongue Wt. (lbs) 2400
Fifth Wheel Hitch - Max Tongue Wt. (lbs) 1590
Dead Weight Hitch - Max Tongue Wt. (lbs) 1000
Wt Distributing Hitch - Max Trailer Wt. (lbs) 12000

Transmission

Trans PTO Access
Transfer Case Model
Transfer Case Gear Ratio (:1), High
Transfer Case Gear Ratio (:1), Low
Transfer Case Power Take Off
Fifth Gear Ratio (:1) 0.71
Fifth Gear Ratio (:1) 1.00
Fourth Gear Ratio (:1) 1.00
Fourth Gear Ratio (:1) 0.75
Fourth Gear Ratio (:1) 1.31
Third Gear Ratio (:1) 1.67
Third Gear Ratio (:1) 1.41
Third Gear Ratio (:1) 1.00
Third Gear Ratio (:1) 2.10
Second Gear Ratio (:1) 3.04
Second Gear Ratio (:1) 1.81
Second Gear Ratio (:1) 1.48
Second Gear Ratio (:1) 3.31
First Gear Ratio (:1) 5.61
First Gear Ratio (:1) 3.10
Drivetrain Rear Wheel Drive
Seventh Gear Ratio (:1)
Trans Type 4
Trans Order Code MW3
Trans Order Code M74
Trans Order Code ML6
Trans Order Code MT1
Fifth Gear Ratio (:1)
Fifth Gear Ratio (:1) 0.75
Sixth Gear Ratio (:1) 0.76
Sixth Gear Ratio (:1)
Reverse Ratio (:1) 5.23
Reverse Ratio (:1) 2.08
Reverse Ratio (:1) 4.49
Reverse Ratio (:1) 5.61
Clutch Size (in) - TBD -
Clutch Size (in)
Clutch Size (in) - TBD -
Trans Power Take Off
Trans Power Take Off Yes
Trans PTO Access LH/RH
Trans PTO Access RH
First Gear Ratio (:1) 2.48
First Gear Ratio (:1) 5.79
Trans Description Cont. Again
Trans Description Cont. Manual w/OD
Trans Description Cont. HD Manual w/OD
Trans Description Cont. HD Automatic w/OD
Trans Description Cont. Automatic w/OD
Trans Type 5
Trans Type 6

Weight Information

Gross Combined Wt Rating (lbs) 22000
Gross Combined Wt Rating (lbs) 20000
Gross Combined Wt Rating (lbs) 22000
Gross Combined Wt Rating (lbs) 22000
Gross Combined Wt Rating (lbs) 16000
Gross Axle Wt Rating - Front (lbs) 4410
Gross Axle Wt Rating - Rear (lbs) 6084
Curb Weight - Front (lbs) 2809
Curb Weight - Rear (lbs) 2071
Gross Vehicle Weight Rating Cap (lbs) 8500
Gross Vehicle Weight Rating Cap (lbs) 9200
Gross Combined Wt Rating (lbs) 14000

Wheels

Spare Wheel Size (in)
Spare Wheel Material
Spare Wheel Material Steel
Rear Wheel Size (in) 16 x 6.5
Front Wheel Size (in) 16 x 6.5
Front Wheel Material Steel
Spare Wheel Size (in) 16 x 6.5
Rear Wheel Material Steel

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