Specs

Research 2003 GMC Sierra 1500 specs for the trims available. Choose the desired trim / style from the dropdown list to see the corresponding specs.

2WD Regular Cab Standard Box

Brakes

Brake ABS System (Second Line)
Brake ABS System Four-Wheel
Brake Type Pwr
Rear Drum Diam x Width (in)
Drum - Rear (Yes or )
Rear Brake Rotor Diam x Thickness (in) 12.8 x 0.78
Front Brake Rotor Diam x Thickness (in) 12.0 x 1.10
Disc - Rear (Yes or ) Yes
Disc - Front (Yes or ) Yes

Cargo Area Dimensions

Cargo Box Width @ Floor (in) 49.1
Cargo Box Width @ Top, Rear (in) 64.8
Cargo Box Length @ Floor (in) 78.7
Cargo Box Length @ Floor (in) 78.6
Ext'd Cab Cargo Volume (ft³)
Cargo Volume (ft³) 56.9
Cargo Volume (ft³) 43.5
Tailgate Width (in) 64.8
Tailgate Width (in) 49.1
Cargo Box (Area) Height (in) 19.5
Cargo Box Width @ Top, Rear (in) 49.1
Cargo Box (Area) Height (in) 19.7
Cargo Box Width @ Wheelhousings (in) 50.0
Cargo Box Width @ Floor (in) 64.8

Cooling System

Total Cooling System Capacity (qts) 13.6
Total Cooling System Capacity (qts) 14.4
Total Cooling System Capacity (qts) 11.72

Electrical

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

Engine

Displacement 5.3L/325
Engine Type Gas/Ethanol V8
Displacement 4.8L/293
Engine Type Gas V8
Engine Order Code LU3
Engine Order Code L59
Engine Order Code LM7
Engine Oil Cooler
SAE Net Torque @ RPM 325 @ 4000
SAE Net Horsepower @ RPM 200 @ 4400
SAE Net Torque @ RPM 285 @ 4000
SAE Net Horsepower @ RPM 285 @ 5200
SAE Net Horsepower @ RPM 270 @ 5200
Engine Order Code LR4
Engine Type Gas V6
SAE Net Torque @ RPM 260 @ 2800
Fuel System MFI
Fuel System SFI
Displacement 4.3L/262

Exterior Dimensions

Overhang, Front (in) 36.9
Ground Clearance, Rear (in) 13.6
Ground Clearance, Front (in) 10.6
Frame Width, Rear (in) - TBD -
Ground to Top of Frame (in) - TBD -
Ground to Top of Load Floor (in) 31.3
Cab to End of Frame (in) - TBD -
Cab to Axle (in) 41.9
Front Bumper to Back of Cab (in) 114.0
Overhang, Rear w/o bumper (in) 47.3
Height, Overall (in) 71.2
Width, Max w/o mirrors (in) 78.5
Length, Overall w/o rear bumper (in) 203.2
Wheelbase (in) 119.0

Frame

Frame Type Ladder

Fuel Tank

Fuel Tank Location LH
Aux Fuel Tank Capacity, Approx (gal)
Fuel Tank Capacity, Approx (gal) 26
Aux Fuel Tank Location

Interior Dimensions

Front Head Room (in) 41.0
Passenger Capacity 3
Front Leg Room (in) 41.3
Front Shoulder Room (in) 61.4
Front Hip Room (in) 63.9

Mileage

EPA Fuel Economy Est - City (MPG) 11
EPA Fuel Economy Est - City (MPG) 15
EPA Fuel Economy Est - Hwy (MPG) 14
EPA Fuel Economy Est - Hwy (MPG) 19
EPA Fuel Economy Est - Hwy (MPG) 20
EPA Fuel Economy Est - City (MPG) 15
EPA Fuel Economy Est - City (MPG) 16
EPA Fuel Economy Est - Hwy (MPG) 21

Steering

Turning Diameter - Wall to Wall (ft) - TBD -
Turning Diameter - Curb to Curb (ft) 38.5
Steering Ratio (:1), At Lock - TBD -
Steering Ratio (:1), On Center 14.2
Steering Type Pwr

Summary

Body Code E62
Body Style Reg Cab 6.5' Sportside
Vehicle Name GMC Sierra 1500
Body Code E63
Body Style Reg Cab 6.5' Wideside

Suspension

Axle Ratio (:1) - Front
Suspension Type - Front Coil Spring
Suspension Type - Rear 2-Stage Multi-Leaf
Spring Capacity - Front (lbs) 3476
Spring Capacity - Rear (lbs) 3686
Axle Type - Front Independent
Axle Type - Rear Semi-Floating
Axle Capacity - Front (lbs) 3150
Axle Capacity - Rear (lbs) 3750
Axle Ratio (:1) - Rear 3.73
Axle Ratio (:1) - Rear 3.42
Shock Absorber Diameter - Front (mm) 32
Shock Absorber Diameter - Front (mm) 46
Shock Absorber Diameter - Front (mm) 35
Shock Absorber Diameter - Rear (mm) 32
Shock Absorber Diameter - Rear (mm) 46
Shock Absorber Diameter - Rear (mm) 35
Stabilizer Bar Diameter - Front (in) 1.42
Stabilizer Bar Diameter - Rear (in) - TBD -

Tires

Spare Tire Order Code QNF
Spare Tire Order Code QCJ
Rear Tire Order Code QCJ
Rear Tire Order Code QNF
Spare Tire Order Code QCC
Front Tire Order Code QCC
Front Tire Order Code QCJ
Front Tire Order Code QNF
Rear Tire Order Code QCC
Revolutions/Mile @ 45 mph - Spare - TBD -
Revolutions/Mile @ 45 mph - Spare - TBD -
Revolutions/Mile @ 45 mph - Rear - TBD -
Revolutions/Mile @ 45 mph - Rear - TBD -
Revolutions/Mile @ 45 mph - Front - TBD -
Revolutions/Mile @ 45 mph - Front - TBD -
Spare Tire Capacity (lbs) 1723
Spare Tire Capacity (lbs) 1853
Rear Tire Capacity (lbs) 1903
Rear Tire Capacity (lbs) 2064
Front Tire Capacity (lbs) 1723
Front Tire Capacity (lbs) 1853
Spare Tire Size P235/75R16
Spare Tire Size P255/70R16
Rear Tire Size P235/75R16
Rear Tire Size P255/70R16
Front Tire Size P235/75R16
Front Tire Size P255/70R16

Trailering

Fifth Wheel Hitch - Max Tongue Wt. (lbs)
Dead Weight Hitch - Max Trailer Wt. (lbs) 5000
Dead Weight Hitch - Max Tongue Wt. (lbs) 500
Wt Distributing Hitch - Max Trailer Wt. (lbs) 4400
Wt Distributing Hitch - Max Trailer Wt. (lbs) 5400
Wt Distributing Hitch - Max Trailer Wt. (lbs) 5000
Wt Distributing Hitch - Max Trailer Wt. (lbs) 6400
Wt Distributing Hitch - Max Trailer Wt. (lbs) 7400
Wt Distributing Hitch - Max Trailer Wt. (lbs) 7400
Wt Distributing Hitch - Max Trailer Wt. (lbs) 8400
Wt Distributing Hitch - Max Trailer Wt. (lbs) 4000
Wt Distributing Hitch - Max Tongue Wt. (lbs) 440
Wt Distributing Hitch - Max Tongue Wt. (lbs) 540
Wt Distributing Hitch - Max Tongue Wt. (lbs) 500
Wt Distributing Hitch - Max Tongue Wt. (lbs) 640
Wt Distributing Hitch - Max Tongue Wt. (lbs) 740
Wt Distributing Hitch - Max Tongue Wt. (lbs) 740
Wt Distributing Hitch - Max Tongue Wt. (lbs) 840
Wt Distributing Hitch - Max Tongue Wt. (lbs) 400
Fifth Wheel Hitch - Max Trailer Wt. (lbs) 6400
Fifth Wheel Hitch - Max Trailer Wt. (lbs) 7400
Fifth Wheel Hitch - Max Trailer Wt. (lbs) 8400
Fifth Wheel Hitch - Max Trailer Wt. (lbs)
Fifth Wheel Hitch - Max Tongue Wt. (lbs) 960
Fifth Wheel Hitch - Max Tongue Wt. (lbs) 1110
Fifth Wheel Hitch - Max Tongue Wt. (lbs) 1260

Transmission

Second Gear Ratio (:1) 2.32
Seventh Gear Ratio (:1)
Drivetrain Rear Wheel Drive
Trans Order Code M30
Trans Order Code MG5
Trans Type 4
Trans Type 5
Trans Description Cont. Automatic w/OD
Trans Description Cont. Manual w/OD
Trans Description Cont. Again
First Gear Ratio (:1) 3.06
First Gear Ratio (:1) 4.02
Second Gear Ratio (:1) 1.63
Transfer Case Power Take Off
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) - TBD -
Clutch Size (in)
Clutch Size (in) - TBD -
Reverse Ratio (:1) 3.55
Reverse Ratio (:1) 2.29
Sixth Gear Ratio (:1)
Fifth Gear Ratio (:1) 0.73
Fifth Gear Ratio (:1)
Fourth Gear Ratio (:1) 1.00
Fourth Gear Ratio (:1) 0.70
Third Gear Ratio (:1) 1.40
Third Gear Ratio (:1) 1.00

Weight Information

Gross Combined Wt Rating (lbs) 9000
Gross Combined Wt Rating (lbs) 8500
Gross Combined Wt Rating (lbs) 13000
Gross Combined Wt Rating (lbs) 12000
Gross Combined Wt Rating (lbs) 11000
Gross Combined Wt Rating (lbs) 10000
Gross Combined Wt Rating (lbs) 9500
Gross Combined Wt Rating (lbs) 10000
Gross Combined Wt Rating (lbs) 9000
Gross Vehicle Weight Rating Cap (lbs) 6100
Curb Weight - Rear (lbs) 1676
Curb Weight - Front (lbs) 2347
Gross Axle Wt Rating - Rear (lbs) 3686
Gross Axle Wt Rating - Front (lbs) 2950

Wheels

Front Wheel Size (in) 16 x 6.5
Front Wheel Size (in) 16 x 7
Rear Wheel Size (in) 16 x 6.5
Rear Wheel Size (in) 16 x 7
Spare Wheel Size (in) 16 x 6.5
Spare Wheel Size (in) 16 x 7
Spare Wheel Material Steel
Rear Wheel Material Steel
Rear Wheel Material Aluminum
Rear Wheel Material Chrome
Front Wheel Material Aluminum
Front Wheel Material Steel
Front Wheel Material Chrome

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