2008 GMC Sierra 3500HD SLT Specs

GMC Sierra 3500HD

2008 GMC Sierra 3500HD 2WD Extended Cab 157.5" SRW SLT powered by 6.0-liter V8 Gas Engine with 6-Speed Automatic transmission.

Back to 2008 GMC Sierra 3500HD
Select configuration:
Starting Price (MSRP)
6.0-liter V8 Gas
6-Speed Automatic
Rear-Wheel Drive
Body Type
Seating capacity
5 seater
Trunk Volume
Fuel Economy
City: TBC
Hwy: TBC

Performance Specs

Engine and Transmission

  • Engine
    6.0-liter V8 Gas
    Engine (+$7,195)
  • Horsepower
    353 hp @ 5400 rpm
  • Torque
    373 lb-ft @ 4400 rpm
  • Transmission
    6-Speed Automatic
  • Drivetrain
    Rear-Wheel Drive


  • Steering Type
  • Turning Diameter
    52.5 ft


  • Wheels Type
    Aluminum Wheels
  • Front Wheel Size
    17" x 7.5"
  • Rear Wheel Size
    17" x 7.5"


  • Front Tire
  • Rear Tire
  • Spare Tire

Fuel and MPG

Fuel Tank

  • Fuel Tank Capacity
    34 gallons

Dimensions and Measurement

Exterior Dimensions

  • Height
    76 in
  • Max Width
    95.9 in
  • Wheelbase
    157.5 in

Interior Space

  • Seating Capacity
    5 seater
  • Front Seat Leg Room
    41.3 in
  • Front Seat Headroom
    41.3 in
  • Front Seat Shoulder Room
    65.2 in
  • Front Seat Hip Room
    62.5 in
  • Rear Seat Leg Room
    34.3 in
  • Rear Seat Headroom
    39.3 in
  • Rear Seat Shoulder Room
    65.3 in
  • Rear Seat Hip Room
    61.8 in

Colors and Materials

Standard Interior Materials

  • Dark Titanium/Light Titanium, Ultrasoft leather-appointed seat trim
  • Ebony, Ultrasoft leather-appointed seat trim
  • Very Dark Cashmere/Light Cashmere, Ultrasoft leather-appointed seat trim

Features and Options

Interior Trim

  • Bucket Seats
    Not Available
  • Cloth Seats
  • Leather Seats
  • Leather Steering Wheel
    Not Available
  • Premium Synthetic Seats
  • Vinyl Seats
  • Woodgrain Interior Trim
    Not Available
  • Sun/Moonroof
    Not Available

Additional Packages

Convenience Package


includes (JF4) adjustable power pedals, (AP3) remote vehicle starter system and (UD7) Rear Parking Assist (Requires Extended or Crew Cab models. Not available with (ZW9) Pickup bed delete or (VF7) rear bumper delete.) Convenience Package Includes power-adjustable pedals, remote vehicle starter system and rear parking assist (On SLE-1, requires Extended or Crew Cab models).

EZ-Lift tailgate package


includes (A60) locking tailgate and (PPA) EZ-Lift tailgate (Not available with TC30903 models or (ZW9) pickup box delete) EZ Lift Tailgate Package Includes tailgate lock and torque rod assist (Not available on 3500HD Regular Cab, Long Box)

SLT Preferred Equipment Group

includes standard equipment

Z71 Off-Road Package


includes (Z71) Off-Road Suspension Package, (G80) heavy-duty automatic locking rear differential and (NZZ) Skid Plate Package (Not available with (ZW9) Pickup box delete or (C7W) 11,400 lbs. (5171 kg) GVWR (dual rear wheel)) Z71 Off-Road Package Includes Z71 Off-Road suspension, Eaton heavy-duty Automatic Locking Rear Differential and Skid Plate Package (Requires LT245/75R16E on-/off-road blackwall tires or LT265/75R17E all-terrain, blackwall tires).


Warranty Summary

  • Basic
    3 Years / 36,000 Miles
  • Corrosion
    6 Years / 100,000 Miles
  • Drivetrain
    5 Years / 100,000 Miles
  • Roadside Assistance
    5 Years / 100,000 Miles