Specs

Research 1999 GMC Sierra 2500 specs for the trims available. Choose the desired trim / style from the dropdown list to see the corresponding specs.

Reg Cab 131.5" WB

Brakes

Brake ABS System Four Wheel
Brake Type Power
Brake ABS System (Second Line)
Disc - Front (Yes or ) Yes
Disc - Rear (Yes or )
Front Brake Rotor Diam x Thickness (in) 12.50 x 1.26
Rear Brake Rotor Diam x Thickness (in)
Drum - Rear (Yes or ) Yes
Rear Drum Diam x Width (in) 13.0 x 3.5
Rear Drum Diam x Width (in) 13.0 x 2.5

Cooling System

Total Cooling System Capacity (qts) 17.1
Total Cooling System Capacity (qts) 23.8

Electrical

Maximum Alternator Capacity (amps) 100
Maximum Alternator Watts 1200
Cold Cranking Amps @ 0° F (2nd)
Cold Cranking Amps @ 0° F (2nd) 600
Cold Cranking Amps @ 0° F (Primary) 600

Engine

SAE Net Torque @ RPM 420 @ 1800
SAE Net Torque @ RPM 330 @ 2800
Engine Oil Cooler Yes
Engine Order Code L29
Engine Order Code L65
Engine Order Code L31
Engine Type Gas V8
Engine Type Diesel V8
Engine Type Gas V8
Displacement 7.4L/454
Displacement 6.5L/395
Displacement 5.7L/350
Fuel System Turbo-Charged EFI
SAE Net Horsepower @ RPM 290 @ 4000
Fuel System SFI
SAE Net Horsepower @ RPM 195 @ 3400
SAE Net Horsepower @ RPM 255 @ 4600
SAE Net Torque @ RPM 410 @ 3200
SAE Net Torque @ RPM 430 @ 1800

Exterior Dimensions

Cab to Axle (in) 55.9
Front Bumper to Back of Cab (in) 111.0
Overhang, Rear w/o bumper (in) 41.7
Overhang, Front (in) 35.4
Height, Overall (in) 73.8
Width, Max w/o mirrors (in) 76.8
Length, Overall w/o rear bumper (in) 208.6
Wheelbase (in) 131.5
Ground Clearance, Rear (in) 7.3
Ground to Top of Load Floor (in)
Ground to Top of Frame (in) 32.2
Frame Width, Rear (in) 36.7
Ground Clearance, Front (in) 7.1
Cab to End of Frame (in) 97.6

Frame

Frame Type Ladder

Fuel Tank

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

Interior Dimensions

Front Shoulder Room (in) 65.0
Passenger Capacity 2
Passenger Capacity 3
Front Hip Room (in) 60.1
Front Leg Room (in) 41.5
Front Head Room (in) 40.0

Mileage

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

Steering

Steering Type Power
Steering Ratio (:1), On Center 16.4
Steering Ratio (:1), At Lock 15.3
Turning Diameter - Curb to Curb (ft) 43.4
Turning Diameter - Wall to Wall (ft) 47.9

Summary

Body Style Reg Cab 131.5" Wheelbase
Vehicle Name GMC Sierra 2500
Body Code ZW9

Suspension

Axle Capacity - Front (lbs) 4100
Axle Type - Rear Semi-Floating
Axle Type - Rear Full-Floating
Suspension Type - Rear 2-Stage Multi-Leaf
Spring Capacity - Front (lbs) 4100
Spring Capacity - Front (lbs) 3600
Spring Capacity - Rear (lbs) 6084
Axle Type - Front
Stabilizer Bar Diameter - Rear (in)
Suspension Type - Front Indep Coil Spring
Stabilizer Bar Diameter - Front (in) 1.25
Shock Absorber Diameter - Rear (mm) 35
Shock Absorber Diameter - Front (mm) 35
Axle Ratio (:1) - Rear 4.10
Axle Ratio (:1) - Rear 3.73
Axle Ratio (:1) - Front
Axle Capacity - Rear (lbs) 6000

Tires

Rear Tire Order Code YGK
Front Tire Order Code XGK
Front Tire Order Code XHH
Rear Tire Order Code YHH
Spare Tire Order Code ZHH
Spare Tire Order Code ZGK
Spare Tire Order Code
Front Tire Size LT245/75R16E
Rear Tire Size LT245/75R16E
Spare Tire Size LT245/75R16E
Spare Tire Size
Front Tire Capacity (lbs) 2205
Rear Tire Capacity (lbs) 3042
Spare Tire Capacity (lbs) 3042
Spare Tire Capacity (lbs)
Revolutions/Mile @ 45 mph - Front 678
Revolutions/Mile @ 45 mph - Rear 678
Revolutions/Mile @ 45 mph - Spare 678
Revolutions/Mile @ 45 mph - Spare

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) 10,000
Wt Distributing Hitch - Max Tongue Wt. (lbs) 1000
Fifth Wheel Hitch - Max Trailer Wt. (lbs)

Transmission

Transfer Case Model
Trans Description Cont. Again Deep Low
Trans Description Cont. Again Electronic
Trans Description Cont. HD Manual w/OD,
Trans Description Cont. HD Automatic w/OD,
Trans Type 5
Trans Type 4
Trans Order Code MW3
Trans Order Code MT1
Transfer Case Power Take Off
Transfer Case Gear Ratio (:1), Low
Transfer Case Gear Ratio (:1), High
Trans PTO Access LH/RH
Trans PTO Access
Trans Power Take Off SAE 6-Bolt
Trans Power Take Off
Clutch Size (in) 12
Clutch Size (in)
Reverse Ratio (:1) - TBD -
Reverse Ratio (:1) 2.08
Drivetrain Rear Wheel Drive
Seventh Gear Ratio (:1)
Sixth Gear Ratio (:1)
Fifth Gear Ratio (:1) 0.75
Fifth Gear Ratio (:1)
Fourth Gear Ratio (:1) 1.00
Fourth Gear Ratio (:1) 0.75
Third Gear Ratio (:1) 1.67
Third Gear Ratio (:1) 1.00
Second Gear Ratio (:1) 3.04
Second Gear Ratio (:1) 1.48
First Gear Ratio (:1) 5.61
First Gear Ratio (:1) 2.48

Weight Information

Gross Axle Wt Rating - Rear (lbs) 6000
Gross Axle Wt Rating - Front (lbs) 3600
Gross Axle Wt Rating - Front (lbs) 4100
Gross Combined Wt Rating (lbs) 17,000
Gross Combined Wt Rating (lbs) 14,500
Gross Combined Wt Rating (lbs) 15,000
Curb Weight - Rear (lbs) 1498
Gross Vehicle Weight Rating Cap (lbs) 8600
Curb Weight - Front (lbs) 2887
Gross Combined Wt Rating (lbs) 12,000
Gross Combined Wt Rating (lbs) 13,500

Wheels

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

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