GMC Sierra 2500HD vs GMC C/K 2500 Series Compare price, expert/user reviews, mpg, engines, safety, cargo capacity and other specs at a glance.

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2021 GMC Sierra 2500HD AT4 Crew Cab 4WD
Photo of 2020 model year shown

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2021 GMC Sierra 2500HD
AT4 Crew Cab 4WD
MSRP
$58,400
Invoice
$54,662
Average Price Paid
$56,188
575 listings nationwide

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2000 GMC C/K 2500 Series
C2500 SL Crew Cab RWD
No Data Available
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2021 GMC Sierra 2500HD
AT4 Crew Cab 4WD
No Data Available
2000 GMC C/K 2500 Series
C2500 SL Crew Cab RWD
No Data Available

Specs

2021 GMC Sierra 2500HD
AT4 Crew Cab 4WD
2000 GMC C/K 2500 Series
C2500 SL Crew Cab RWD
Powertrain
Drivetrain
4X4
4X4
RWD
RWD
RWD
RWD
RWD
RWD
Fuel Economy, City -- --
Fuel Economy, Highway -- --
Fuel Tank Volume 36 gal 26 gal
Engine
Fuel Type
Biodiesel
Gasoline
Diesel
Gasoline
Gasoline
Gasoline
Diesel
Gasoline
Power
--
401 hp @ 5,200 RPM
195 hp @ 3,400 RPM
290 hp @ 4,000 RPM
255 hp @ 4,600 RPM
290 hp @ 4,000 RPM
195 hp @ 3,400 RPM
255 hp @ 4,600 RPM
Torque
--
464 lb-ft @ 4,000 RPM
430 lb-ft @ 1,800 RPM
410 lb-ft @ 3,200 RPM
330 lb-ft @ 2,800 RPM
410 lb-ft @ 3,200 RPM
430 lb-ft @ 1,800 RPM
330 lb-ft @ 2,800 RPM
Cylinders
8 cylinders
8 cylinders
8 cylinders
8 cylinders
8 cylinders
8 cylinders
8 cylinders
8 cylinders
Compression Ratio
16:1
10.8:1
--
--
9.4:1
--
--
9.4:1
Displacement
6,600 cc
6,600 cc
6,500 cc
7,400 cc
5,700 cc
7,400 cc
6,500 cc
5,700 cc
Bore x Stroke
4.06 in x 3.9 in
4.06 in x 3.86 in
--
--
4 in x 3.48 in
--
--
4 in x 3.48 in
Safety
ABS Brakes Standard Standard
Driver Airbag Standard --
Passenger Airbag Standard --
Front Side Airbags Standard --
Curtain Airbags Standard --
Comfort and Convenience
Air Conditioning Standard Optional
Cassette Player -- Optional
Radio Standard Standard
Power Windows Standard --
Power Door Locks Standard Optional
Driver Power Seats Standard --
Passenger Power Seats Standard --
Interior
Maximum Seating 5 seats 6 seats
Front Legroom 44.5 in 41.7 in
Back Legroom 43.4 in 34.8 in
Payload and Towing
Cargo Volume -- --
Maximum Payload 3,760 lbs 3,184 lbs
Standard Towing Capacity 14,500 lbs --
Maximum Towing Capacity 18,500 lbs --
Exterior
Length 250.1 in 231.9 in
Width 81.9 in 76.8 in
Height 79.8 in 73.9 in
Wheelbase 158.9 in 154.5 in
Bed Length 82.2 in 78.6 in

Available Options

2021 GMC Sierra 2500HD
AT4 Crew Cab 4WD

Exterior Colors

  • Brownstone Metallic
  • Cayenne Red Tintcoat
  • Ebony Twilight Metallic
  • Onyx Black
  • Pacific Blue Metallic
  • Summit White

Option Packages

  • Engine, Duramax 6.6L Turbo-Diesel V8, B20-Diesel Compatible
  • AT4 Preferred Package
  • AT4 Premium Plus Package
  • Driver Alert Package I
  • Driver Alert Package II
  • Gooseneck / 5TH Wheel Package
  • LPO, 20" (50.8 CM) High Gloss Black Aluminum Wheels With Machined Accents
  • LPO, 20" (50.8 CM) High Gloss Black Painted Wheels
  • LPO, AT4 High Clearance Step
  • LPO, Auxiliary Trailer Camera
  • LPO, Bedside Storage Boxes
  • LPO, Body Color Wheel Arch Moldings
  • LPO, Cargo Convenience Package
  • LPO, Sport Step, Black
  • LPO, Tri-Fold Hard Tonneau Cover
  • LPO, Tri-Fold Soft Tonneau Cover
  • MULTIPRO Audio System By Kicker
  • Sunroof, Power
  • Technology Package
  • Wheels, 20" (50.8 CM) Machined Aluminum
2000 GMC C/K 2500 Series
C2500 SL Crew Cab RWD

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