2021 GMC Sierra 3500HD SLT
*Estimated taxes and fees. All amounts reflect the dealership’s listing. DriversHub assumes no liability for omissions, inaccuracies, or non‑disclosed fees in dealer‑supplied pricing.
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71 days at this dealer
More time on the market may make the dealer open to offers.
21 active alternatives
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Miles Overview
The 2021 Sierra 3500HD is GMC's heavy-duty pickup, built for serious towing and hauling work. It drives with the authority you expect from a heavy-duty truck, though the ride can be stiff when unloaded. The cabin is roomy and quiet, with upscale touches on higher trims like the Denali. You get a choice of regular, double, or crew cab, and the bed is built to take abuse. The SLT adds leather upholstery, heated front seats, and a larger touchscreen over the base SLE, while skipping the AT4's off-road hardware. The 6.6L V8 makes 401 horsepower and 464 lb-ft of torque, paired with a six-speed automatic that's built for heavy loads. You can option the SLT with the Max Trailering Package, which bumps the towing capacity to its highest rating.
Vehicle Specs
Miles Overview
The 2021 Sierra 3500HD is GMC's heavy-duty pickup, built for serious towing and hauling work. It drives with the authority you expect from a heavy-duty truck, though the ride can be stiff when unloaded. The cabin is roomy and quiet, with upscale touches on higher trims like the Denali. You get a choice of regular, double, or crew cab, and the bed is built to take abuse. The SLT adds leather upholstery, heated front seats, and a larger touchscreen over the base SLE, while skipping the AT4's off-road hardware. The 6.6L V8 makes 401 horsepower and 464 lb-ft of torque, paired with a six-speed automatic that's built for heavy loads. You can option the SLT with the Max Trailering Package, which bumps the towing capacity to its highest rating.
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Estimated Monthly Payment
$701
6% APR for 72 months
*Estimated taxes and fees. All amounts reflect the dealership’s listing. DriversHub assumes no liability for omissions, inaccuracies, or non‑disclosed fees in dealer‑supplied pricing.
Negotiation Potential
71 days at this dealer
More time on the market may make the dealer open to offers.
21 active alternatives
Similar vehicles nationwide
More available alternatives can strengthen your position.
Ask Miles about this car, what it should cost, and how to handle the dealer.
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About this Dealer
Verified Dealer
Mark's Discount Truck and Auto Sales is a car dealer in Londonderry, NH.