GMC Sierra 3500HD V (GMTT1XX) Crew Cab Long Bed 6.6 V8 (401 Hp) DRW Automatic


Overall Rating

8.7 / 10
Safety N/A / 5
Not Rated
Engine 4.8 / 5
Value 4.2 / 5
Performance 4.7 / 5
Comfort 4.0 / 5
People\'s Opinion 2.9 / 5

GMC Sierra 3500HD:

The Chevrolet Silverado is a range of trucks manufactured by General Motors under the Chevrolet brand. Introduced for the 1999 model year, the Silverado is the successor to the long-running Chevrolet C/K model line. Taking its name from the top trim level from the Chevrolet C/K series, the Silverado is offered as a series of full-size pickup trucks, chassis cab trucks, and medium-duty trucks. The fourth generation of the model line was introduced for the 2019 model year.
The Chevrolet Silverado shares mechanical commonality with the identically related GMC Sierra; GMC ended the use of the C/K nomenclature a model generation prior to Chevrolet. In Mexico, high-trim level versions of the Silverado use the Chevrolet Cheyenne name. Competing against the Ford F-Series, Ram pickup, Toyota Tundra, and Nissan Titan, the Silverado is among the best-selling vehicles in the United States, having sold over 12 million trucks since its introduction in 1998 as a 1999 model year....(Read more on Wikipedia)

V (GMTT1XX) Crew Cab Long Bed Overview:

GMC Sierra 3500HD (V (GMTT1XX) Crew Cab Long Bed). With 629 Nm of torque, it offers ample pulling power. At around 3661 kg, it’s on the heavier side. Rear‑wheel drive offers dynamic handling and sporty feedback. A vehicle with an open cargo bed at the back, suitable for transporting goods. Seating for 5 makes it ideal for daily use.

6.6 V8 (401 Hp) DRW Automatic Verdict:

Rating 4 stars

Performance Verdict

The 6.6L gasoline V8 paired with a Dual Rear Wheel (DRW) setup maximizes stability and payload capacity for heavy loads.

Fuel Economy

Fuel consumption is a primary consideration, as the DRW configuration adds weight and rolling resistance, impacting efficiency.

Best Use Case: Maximum Payload Hauling, Commercial Fleets, RV Towing (large trailers).

reddit Community Verdict

This rating is based on comments found on Reddit, scanned using artificial intelligence, and may not accurately reflect reality.

Allowed: 32% Neutral: 32% Issues: 36%
rating
2.9 / 5

Based on AI analysis of 22 discussions

Read What Owners Say
😐 NEUTRAL
There's a bulletin calling out this ground. Not super uncommon.
👎 NEGATIVE
GM's have had this ground strap issue for awhile. It can really wreak havoc on your electrical system.
👎 NEGATIVE
Who would've believed that on 2020 vehicles we are still dealing with ground strap issues. Seems like something we should've figured out 30 years ago.
😐 NEUTRAL
I've heard that a #4 tinned battery cable with the appropriate ring terminals on each end is even cheaper and is a more permanent fix than using the crap copper braids that GM loves to shove in wheel wells...
👎 NEGATIVE
"Go replace all the modules that had codes just to be sure." - dealership service manager.
😐 NEUTRAL
Pretty common. Always start with the simple and move to complex when it comes to your troubleshooting process.
😐 NEUTRAL
There was a great YouTube video by South Main Auto on this same exact problem.
😐 NEUTRAL
Where would I find this strap on a 2018 Yukon…
😐 NEUTRAL
Eric O at South Main Auto (youtube) found this out a couple years back and pretty much every GM truck or SUV he touches that has "odd" issues the first thing he does is check that ground strap on the frame rail, and it's always green and disintegrating. This is an opportunity for an aftermarket company to sell replacement grounding straps that are, you know, weather proof. Since there're, you kn
👎 NEGATIVE
I had wild intermittent symptoms from a poor ground on a Tahoe. ABS issues, doors locking and unlocking, gauge cluster randomness, unpredictable no crank. It was like the truck was possessed.


Pros and Cons:

Pros:

  • • Exceptional towing and hauling capabilities, especially with the Duramax diesel.
  • • Robust and durable construction designed for heavy-duty work.
  • • Spacious and comfortable Crew Cab interior with modern amenities.
  • • Available 4WD and DRW configurations offer versatility for various tasks and terrains.
  • • Powerful engine options (gasoline and diesel) to suit different needs.

Cons:

  • • Large size can make maneuvering in urban environments challenging.
  • • Fuel economy, particularly with the gasoline engine and DRW, can be a significant operating cost.
  • • Ride quality can be firm, especially when unloaded, typical for heavy-duty trucks.
  • • Higher purchase price compared to lighter-duty trucks.
  • • Limited parking options due to its sheer length and width.

Specifications:

Specifications are compared to those of the previous generation(IV (GMTK2XX) Crew Cab Long Box: 2017 - 2019).

General:
Brand:GMC
Model:Sierra 3500HD
Generation:V (GMTT1XX) Crew Cab Long Bed
Modification (Engine):6.6 V8 (401 Hp) DRW Automatic
Start of production:2020
End of production:2023
Powertrain Architecture:Internal Combustion engine
Body type:Pick-up
Seats:5
Doors:4
Engine:
Power:401 Hp @ 5200 rpm. Same horsepower
Torque:629 Nm @ 4000 rpm.
Engine Model/Code:L8T More details about the engine L8T
Number of cylinders:8
Engine configuration:V-engine
Number of valves per cylinder:2
Fuel injection system:Direct injection
Engine aspiration:Naturally aspirated engine
Valvetrain:OHV, VVT
Engine oil capacity:7.6 l
Coolant:14.6 l
Engine layout:Front, Longitudinal
Cylinder Bore:103.25 mm mm
Piston Stroke:98 mm mm
Compression ratio:10.8:1
Performance:
Fuel Type:Petrol (Gasoline)
Weight-to-power ratio:9.1 kg/Hp, 109.5 Hp/tonne
Weight-to-torque ratio:5.8 kg/Nm, 171.8 Nm/tonne
Space:
Kerb Weight:3661
Max. weight:6350
Max load:2689
Permitted trailer load with brakes (12%):9072 kg
Fuel tank capacity:136 l
Size:
Length:6759 mm mm [196mm more]
Width:2457 mm mm [412mm more]
Height:2033 mm mm [54mm more]
Wheelbase:4369 mm mm [110mm more]
Width including mirrors:2457 mm
Front track:1731 mm
Rear (Back) track:1905 mm
Ride height (ground clearance):264 mm
Powertrain:
Drivetrain ArchitectureThe Internal combustion engine (ICE) drives the rear wheels of the vehicle.
Drive wheelRear wheel drive
Number of gears6
Transmission typeAutomatic
Gearbox typeHydra-Matic
Front brakesVentilated discs, 355x40 mm [Best for performance and cooling.]
Rear brakesVentilated discs, 355x40 mm [Best for performance and cooling.]
Assisting systemsABS (Anti-lock braking system)
Steering typeCone worm with recirculation balls
Power steeringHydraulic Steering
Tires size235/80 R17; 265/70 R17; 245/75 R17; 275/70 R18; 275/65 R20
Wheel rims size7.5J x 17; 8J x 18; 8.5J x 20
Front suspensionCoil spring, Double wishbone, Transverse stabilizer
Rear suspensionRigid axle suspension, Leaf spring

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