Specs

Research 1999 GMC Sierra 3500HD specs for the trims available. Choose the desired trim / style from the dropdown list to see the corresponding specs.

Reg Cab 135.5" WB C5B

Brakes

Front Brake Rotor Diam x Thickness (in) 13.90 x 1.43
Rear Brake Rotor Diam x Thickness (in) 13.58 x 1.43
Drum - Rear (Yes or )
Rear Drum Diam x Width (in)
Brake Type Power
Disc - Rear (Yes or ) Yes
Brake ABS System Four Wheel
Brake ABS System (Second Line)
Disc - Front (Yes or ) Yes

Cooling System

Total Cooling System Capacity (qts) 23.8

Electrical

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

Engine

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

Exterior Dimensions

Wheelbase (in) 135.5
Ground Clearance, Rear (in) - TBD -
Ground Clearance, Front (in) - TBD -
Frame Width, Rear (in) 34.0
Ground to Top of Frame (in) 31.7
Ground to Top of Load Floor (in)
Cab to End of Frame (in) 111.0
Cab to Axle (in) 60.0
Front Bumper to Back of Cab (in) 113.6
Overhang, Rear w/o bumper (in) 51.0
Overhang, Front (in) 37.9
Height, Overall (in) 77.7
Width, Max w/o mirrors (in) 84.2
Length, Overall w/o rear bumper (in) 224.5

Frame

Frame Type Ladder

Fuel Tank

Fuel Tank Capacity, Approx (gal) 22
Aux Fuel Tank Capacity, Approx (gal) 18
Aux Fuel Tank Location Behind Rear Axle
Aux Fuel Tank Location
Fuel Tank Location Inboard LH Frame
Aux Fuel Tank Capacity, Approx (gal)

Interior Dimensions

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

Mileage

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

Steering

Turning Diameter - Wall to Wall (ft) 47.8
Steering Type Power
Steering Ratio (:1), On Center 18.6
Steering Ratio (:1), At Lock 17.8
Turning Diameter - Curb to Curb (ft) 46.0

Summary

Body Code ZW9
Body Style Reg Cab 135.5" Wheelbase
Vehicle Name GMC Sierra 3500 HD

Suspension

Axle Capacity - Rear (lbs) 11,000
Stabilizer Bar Diameter - Rear (in)
Stabilizer Bar Diameter - Front (in) 1.25
Shock Absorber Diameter - Rear (mm) 35
Shock Absorber Diameter - Front (mm) 35
Axle Ratio (:1) - Rear 4.63
Axle Ratio (:1) - Rear 5.13
Axle Ratio (:1) - Front
Suspension Type - Front Tapered Leaf Spring
Suspension Type - Rear 2-Stage Multi-Leaf
Spring Capacity - Front (lbs) 5000
Spring Capacity - Rear (lbs) 11,000
Axle Type - Front I-Beam
Axle Type - Rear Full-Floating
Axle Capacity - Front (lbs) 5000

Tires

Rear Tire Size 225/70R19.5F
Front Tire Order Code XTN
Rear Tire Order Code YTN
Spare Tire Order Code ZTN
Spare Tire Order Code
Front Tire Size 225/70R19.5F
Spare Tire Size 225/70R19.5F
Spare Tire Size
Front Tire Capacity (lbs) 2595
Rear Tire Capacity (lbs) 2855
Spare Tire Capacity (lbs) 2855
Spare Tire Capacity (lbs)
Revolutions/Mile @ 45 mph - Front 645
Revolutions/Mile @ 45 mph - Rear 645
Revolutions/Mile @ 45 mph - Spare 645
Revolutions/Mile @ 45 mph - Spare

Trailering

Dead Weight Hitch - Max Tongue Wt. (lbs) 500
Fifth Wheel Hitch - Max Trailer Wt. (lbs)
Fifth Wheel Hitch - Max Tongue Wt. (lbs)
Wt Distributing Hitch - Max Trailer Wt. (lbs) 10,000
Wt Distributing Hitch - Max Tongue Wt. (lbs) 1000
Dead Weight Hitch - Max Trailer Wt. (lbs) 5000

Transmission

Transfer Case Gear Ratio (:1), High
Drivetrain Rear Wheel Drive
Seventh Gear Ratio (:1)
First Gear Ratio (:1) 2.48
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 Model
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
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

Weight Information

Gross Vehicle Weight Rating Cap (lbs) 15,000
Gross Combined Wt Rating (lbs) 17,000
Curb Weight - Rear (lbs) 2149
Gross Combined Wt Rating (lbs) 19,000
Gross Axle Wt Rating - Front (lbs) 5000
Gross Axle Wt Rating - Rear (lbs) 11,000
Curb Weight - Front (lbs) 2802

Wheels

Front Wheel Size (in) 19.5 x 6.0
Spare Wheel Size (in) 19.5 x 6.0
Spare Wheel Size (in)
Front Wheel Material Steel
Rear Wheel Material Steel
Spare Wheel Material Steel
Spare Wheel Material
Rear Wheel Size (in) 19.5 x 6.0

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