Review, Specs, Configurations, Prices, and Interior of the 2021 GMC Sierra 3500HD

2021 GMC Sierra 3500HD

MSRP: $37,300 - $67,700
4.2

Reliability

3.5/5

Safety

4.0/5

Interior

4.8/5

Performance

4.5/5

Strengths

  • Smooth 10-speed auto
  • Smart tech towing
  • V-8 diesel engine

Weaknesses

  • Unimpressive gas V-8
  • Cheap old interior
  • Soft braking

Table of Contents

2021 GMC Sierra 3500HD Review 

It is the largest, fastest, and most powerful GMC truck you can find, with the 2021 GMC Sierra 3500HD standing above 2500HD, Sierra 1500, Canyon, and the next Hummer EV. It was redesigned completely last year and adds a balanced 2021 healthy dosage. When we checked the new truck, one of its available powertrains disappointed us too much, but it can be a compelling performer if ordered with the right options.

The Chevrolet Silverado 3500HD, Ford F-350 Super Duty, and Ram 35 all compete with heavy-duty pickups. The 2021 Sierra 3500HD is intended to be workhorses rather than a show for the pickup truck. Although the leading Denali model from GMC looks glamorous and full of upscale features, it does not have the luxury interior it offers, like the most stylish Ford Super Duty or Ram HD. Still, with its Duramax engine developing 910 lb-ft torque and able to pull up to 35.500 pounds, Sierra has a more refined diesel engine.

The GMC offers an independent front suspension, responsive steering, and impressive handling, unlike its Ford and Ram competitors. Yet, compared with the regular Sierra 1500, the largest models remain far from agile. While the 2021 Sierra HD stands out from a host of ingenious towing assists and innovative features, it is still not our favorite heavy-duty pick-up.

More details regarding the 2021 Sierra 3500HD Features, Configurations, and Interior are described in the sections below. If you want to know about the 2021 Jeep Compass, then click our post.

2021 Sierra 3500HD Specs and Features

Engine6.6L V-8
Seating3 Passengers
Power401 @ 5200 rpm
Transmission6-speed automatic
Drivetrainrear-wheel Drive
2021 Sierra 3500HD Specs and Features

What’s Newly Include in 2021 

The new upgrades in the 2021 Sierra 3500HD include the following features:

  • Minor changes to optional equipment packages
  • The fourth generation of Sierra 3500HD was introduced by 2020

2021 GMC Sierra 3500HD Configurations

The different configurations of the 2021 GMC Sierra 3500HD are listed below:

1. 2021 GMC Sierra 3500HD Base 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD Base 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW is $37,300. 

Specs and Features: It has features of 6.6L V-8 engine, 6-spd auto w/OD transmission, 464 @ 4,000 rpm torque, 401 @ 5,200 rpm horsepower, 18″ painted steel wheels, rear-wheel drive type, ABS and driveline traction control, 2 – 1st row LCD monitor, vinyl seat trim, front air conditioning, manual, and AM/FM stereo, seek-scan radio.

2. 2021 GMC Sierra 3500HD Base 4×2 Regular Cab 8 ft. box 141.6 in. WB DRW

Price: The MSRP of the 2021 GMC Sierra 3500HD Base 4×2 Regular Cab 8 ft. box 141.6 in. WB DRW is $38,500. 

Specs and Features: The specs and features are almost the same as Base 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

3. 2021 GMC Sierra 3500HD Base 4×4 Regular Cab 8 ft. box 141.6 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD Base 4×4 Regular Cab 8 ft. box 141.6 in. WB SRW is $40,100. 

Specs and Features: The specs and features are almost the same as Base 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

4. 2021 GMC Sierra 3500HD Base 4×2 Double Cab 8 ft. box 162.5 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD Base 4×2 Double Cab 8 ft. box 162.5 in. WB SRW is $40,100. 

Specs and Features: The specs and features are almost the same as Base 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

5. 2021 GMC Sierra 3500HD Base 4×4 Regular Cab 8 ft. box 141.6 in. WB DRW

Price: The MSRP of the 2021 GMC Sierra 3500HD Base 4×4 Regular Cab 8 ft. box 141.6 in. WB DRW is $41,300. 

Specs and Features: The specs and features are almost the same as Base 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

6. 2021 GMC Sierra 3500HD Base 4×2 Crew Cab 6.75 ft. box 158.9 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD Base 4×2 Crew Cab 6.75 ft. box 158.9 in. WB SRW is $41,700. 

Specs and Features: The specs and features are almost the same as Base 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

7. 2021 GMC Sierra 3500HD Base 4×2 Crew Cab 8 ft. box 172 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD Base 4×2 Crew Cab 8 ft. box 172 in. WB SRW is $41,900. 

Specs and Features: The specs and features are almost the same as Base 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

8. 2021 GMC Sierra 3500HD Base 4×4 Double Cab 8 ft. box 162.5 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD Base 4×4 Double Cab 8 ft. box 162.5 in. WB SRW is $42,900. 

Specs and Features: The specs and features are almost the same as Base 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

9. 2021 GMC Sierra 3500HD Base 4×2 Crew Cab 8 ft. box 172 in. WB DRW

Price: The MSRP of the 2021 GMC Sierra 3500HD Base 4×2 Crew Cab 8 ft. box 172 in. WB DRW is $43,100. 

Specs and Features: The specs and features are almost the same as Base 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

10. 2021 GMC Sierra 3500HD Base 4×4 Double Cab 8 ft. box 162.5 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD Base 4×4 Double Cab 8 ft. box 162.5 in. WB SRW is $42,900. 

Specs and Features: The specs and features are almost the same as Base 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

11. 2021 GMC Sierra 3500HD Base 4×4 Crew Cab 6.75 ft. box 158.9 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD Base 4×4 Crew Cab 6.75 ft. box 158.9 in. WB SRW is $44,500. 

Specs and Features: The specs and features are almost the same as Base 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

12. 2021 GMC Sierra 3500HD Base 4×4 Crew Cab 8 ft. box 172 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HDBase 4×4 Crew Cab 8 ft. box 172 in. WB SRW is $44,700. 

Specs and Features: The specs and features are almost the same as Base 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

13. 2021 GMC Sierra 3500HD Base 4×4 Crew Cab 8 ft. box 172 in. WB DRW

Price: The MSRP of the 2021 GMC Sierra 3500HD Base 4×4 Crew Cab 8 ft. box 172 in. WB DRW is $45,900. 

Specs and Features: The specs and features are almost the same as Base 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

14. 2021 GMC Sierra 3500HD SLE 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLE 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW is $42,400. 

Specs and Features: It has additional or replacing features on the Base. It comes with 18″ machined w/painted accents aluminum wheels, heated mirrors, cloth seat trim, AM/FM/Satellite, seek-scan radio, and keyfob (all doors) remote keyless entry.

15. 2021 GMC Sierra 3500HD SLE 4×2 Regular Cab 8 ft. box 141.6 in. WB DRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLE 4×2 Regular Cab 8 ft. box 141.6 in. WB DRW is $43,600. 

Specs and Features: The specs and features are almost the same as SLE 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

16. 2021 GMC Sierra 3500HD SLE 4×2 Double Cab 8 ft. box 162.5 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLE 4×2 Double Cab 8 ft. box 162.5 in. WB SRW is $44,600. 

Specs and Features: The specs and features are almost the same as SLE 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

17. 2021 GMC Sierra 3500HD SLE 4×4 Regular Cab 8 ft. box 141.6 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLE 4×4 Regular Cab 8 ft. box 141.6 in. WB SRW is $45,200. 

Specs and Features: The specs and features are almost the same as SLE 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

18. 2021 GMC Sierra 3500HD SLE 4×2 Double Cab 8 ft. box 162.5 in. WB DRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLE 4×2 Double Cab 8 ft. box 162.5 in. WB DRW is $45,800. 

Specs and Features: The specs and features are almost the same as SLE 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

19. 2021 GMC Sierra 3500HD SLE 4×2 Crew Cab 6.75 ft. box 158.9 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLE 4×2 Crew Cab 6.75 ft. box 158.9 in. WB SRW is $46,200. 

Specs and Features: The specs and features are almost the same as SLE 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

20. 2021 GMC Sierra 3500HD SLE 4×4 Regular Cab 8 ft. box 141.6 in. WB DRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLE 4×4 Regular Cab 8 ft. box 141.6 in. WB DRW is $46,400. 

Specs and Features: The specs and features are almost the same as SLE 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

21. 2021 GMC Sierra 3500HD SLE 4×2 Crew Cab 8 ft. box 172 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLE 4×2 Crew Cab 8 ft. box 172 in. WB SRW is $46,400. 

Specs and Features: The specs and features are almost the same as SLE 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

22. 2021 GMC Sierra 3500HD SLE 4×4 Double Cab 8 ft. box 162.5 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLE 4×4 Double Cab 8 ft. box 162.5 in. WB SRW is $47,400. 

Specs and Features: The specs and features are almost the same as SLE 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

23. 2021 GMC Sierra 3500HD SLE 4×2 Crew Cab 8 ft. box 172 in. WB DRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLE 4×2 Crew Cab 8 ft. box 172 in. WB DRW is $47,600. 

Specs and Features: The specs and features are almost the same as SLE 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

24. 2021 GMC Sierra 3500HD SLE 4×4 Double Cab 8 ft. box 162.5 in. WB DRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLE 4×4 Double Cab 8 ft. box 162.5 in. WB DRW is $48,600. 

Specs and Features: The specs and features are almost the same as SLE 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

25. 2021 GMC Sierra 3500HD SLE 4×4 Crew Cab 6.75 ft. box 158.9 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLE 4×4 Crew Cab 6.75 ft. box 158.9 in. WB SRW is $49,000. 

Specs and Features: The specs and features are almost the same as SLE 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

26. 2021 GMC Sierra 3500HD SLE 4×4 Crew Cab 8 ft. box 172 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLE 4×4 Crew Cab 8 ft. box 172 in. WB SRW is $49,200. 

Specs and Features: The specs and features are almost the same as SLE 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

27. 2021 GMC Sierra 3500HD SLE 4×4 Crew Cab 8 ft. box 172 in. WB DRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLE 4×4 Crew Cab 8 ft. box 172 in. WB DRW is $50,400. 

Specs and Features: The specs and features are almost the same as SLE 4×2 Regular Cab 8 ft. box 141.6 in. WB SRW.

28. 2021 GMC Sierra 3500HD SLT 4×2 Crew Cab 6.75 ft. box 158.9 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLT 4×2 Crew Cab 6.75 ft. box 158.9 in. WB SRW is $54,200. 

Specs and Features: It has additional or replacing features on SLE. It comes with front air conditioning, dual-zone automatic, Front Fog/driving lights, driver and passenger lumbar support, leather seat trim, AM/FM/HD/Satellite, seek-scan radio, and driver and front passenger heated-cushion, heated-seatback heated front seats.

29. 2021 GMC Sierra 3500HD SLT 4×2 Crew Cab 8 ft. box 172 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLT 4×2 Crew Cab 8 ft. box 172 in. WB SRW is $54,400. 

Specs and Features: The specs and features are almost the same as SLT 4×2 Crew Cab 6.75 ft. box 158.9 in. WB SRW.

30. 2021 GMC Sierra 3500HD SLT 4×4 Crew Cab 6.75 ft. box 158.9 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLT 4×4 Crew Cab 6.75 ft. box 158.9 in. WB SRW is $57,000. 

Specs and Features: The specs and features are almost the same as SLT 4×2 Crew Cab 6.75 ft. box 158.9 in. WB SRW.

31. 2021 GMC Sierra 3500HD SLT 4×4 Crew Cab 8 ft. box 172 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLT 4×4 Crew Cab 8 ft. box 172 in. WB SRW is $57,200. 

Specs and Features: The specs and features are almost the same as SLT 4×2 Crew Cab 6.75 ft. box 158.9 in. WB SRW.

32. 2021 GMC Sierra 3500HD SLT 4×4 Crew Cab 8 ft. box 172 in. WB DRW

Price: The MSRP of the 2021 GMC Sierra 3500HD SLT 4×4 Crew Cab 8 ft. box 172 in. WB DRW is $58,400. 

Specs and Features: The specs and features are almost the same as SLT 4×2 Crew Cab 6.75 ft. box 158.9 in. WB SRW.

33. 2021 GMC Sierra 3500HD AT4 4×4 Crew Cab 6.75 ft. box 158.9 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD AT4 4×4 Crew Cab 6.75 ft. box 158.9 in. WB SRW is $59,800. 

Specs and Features: It has additional or replacing features on SLT. It comes with a Four-wheel Drive type.

34. 2021 GMC Sierra 3500HD AT4 4×4 Crew Cab 8 ft. box 172 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD AT4 4×4 Crew Cab 8 ft. box 172 in. WB SRW is $60,000. 

Specs and Features: The specs and features are almost the same as AT4 4×4 Crew Cab 6.75 ft. box 158.9 in. WB SRW.

35. 2021 GMC Sierra 3500HD Denali 4×4 Crew Cab 6.75 ft. box 158.9 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD Denali 4×4 Crew Cab 6.75 ft. box 158.9 in. WB SRW is $66,300. 

Specs and Features: It has additional or replacing features on AT4. It comes with 20″ polished aluminum Wheels, a Navigation System, and Front and Rear Park Assist Parking assist.

36. 2021 GMC Sierra 3500HD Denali 4×4 Crew Cab 8 ft. box 172 in. WB SRW

Price: The MSRP of the 2021 GMC Sierra 3500HD Denali 4×4 Crew Cab 8 ft. box 172 in. WB SRW is $66,500. 

Specs and Features: The specs and features are almost the same as Denali 4×4 Crew Cab 6.75 ft. box 158.9 in. WB SRW.

37. 2021 GMC Sierra 3500HD Denali 4×4 Crew Cab 8 ft. box 172 in. WB DRW

Price: The MSRP of the 2021 GMC Sierra 3500HD Denali 4×4 Crew Cab 8 ft. box 172 in. WB DRW is $67,700. 

Specs and Features: The specs and features are almost the same as Denali 4×4 Crew Cab 6.75 ft. box 158.9 in. WB SRW.

2021 GMC Sierra 3500HD Configuration
2021 Sierra 3500HD Configuration

2021 Sierra 3500HD Interior

Inside, the 2021 Sierra 3500HD is equipped with a huge dashboard and easy-to-use switchgear. The majority of the models have a split-fold with a pair of bucket seats and the complete center console. A class-exclusive head-up display, heated steering wheels, heated front seats, and wireless charging can be included in Sierra’s interior. The panel fits and material quality of the cabin are, unfortunately, mediocre at best.

The high-end Denali is weak in its luxury billing, despite the abundance of soft-touch surfaces throughout, and most models benefit from durable plastics. Thanks to a considerably higher look and feel, the most fanciful alternatives by Ram overshadow the GMC. However, pick-up truck buyers with priority for practicality and versatility will be pleased by Sierra 3500HD. The GMC is equipped with a handy interior cubby room, along with ample passenger space in the crew cab.

The standard and long cargo boxes on both sides of the bed have built-in steps, and the rear bumper has them on either corner. With LED illumination, mobile tie-downs, and a 120-volt socket, the box can be customized further. The largest Sierra heavy-duty showpiece is its innovative multi-purpose gate with six different positions, including a work surface and a bench. It’s a dream come true of a tailgater. Each Sierra HD is equipped with a standard Apple CarPlay and Android Auto touch screen infotainment system. While models with fewer options are available, a 120 Volt outlet and a mobile hotspot are still available.

The majority of trim levels have a screen of 8.0 inches and additional charging ports. The rotary buttons and physical buttons are available in both systems. With enhanced navigation, Bose Audio, SiriusXM Satellite Radio, and an entertainment system on the rear, the larger touchscreen can be upgraded. GMC has a smartphone app to control trailer functions remotely. The infotainment system of the truck also helps users to store different trailer profiles for maintenance monitoring.

2021 GMC Sierra 3500HD Interior
2021 GMC Sierra 3500 Interior

Should I Buy a 2021 Sierra 3500HD?

Yeah, the GMC Sierra 3500HD 2021 is a good option because it is the largest, fastest, and most powerful GMC truck you can find, with the Sierra 3500HD standing above 2500HD, Sierra 1500, Canyon, and the next Hummer EV.

You may also Ask for

When can you order a 2021 GMC Sierra?

At the end of 2020, the 2021 Sierra 1500 was released.

Does GMC make a 3500?

The 2WD and 4WD crew cab with a 9″ standard bed or 8″ width bed is supplied in the Sierra 3500 heavy-duty truck. The SRW or DRW configuration is available in a long bed. CU. FT 69.6 to 83.5.

How does GMC 2500HD vary from 3500HD?

The main difference between strength and power. The 2500HD will tow up to 18,500 pounds if properly fitted. A regular 3500HD cab has up to 6500 pounds to carry. There’s no comparison between the 2500 and the 3500 if you need a truck that can pull, move, tow, and carry a lot. 

For more information about the latest GMC Sierra 3500HD, kindly visit the Official page.

Bilal Ibrahim

Bilal Ibrahim is an automotive engineer, graduated from NED University of Engineering and Technology.

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