How much does the 2021 GMC Sierra 3500 HD cost?

The 2021 GMC Sierra 3500 HD has a starting MSRP of $37,100, ranging up to $67,500 for the top trim. Trim pricing includes Base from $37,100; SLE from $42,200; SLT from $54,000; AT4 from $59,600; Denali from $66,100.

How much can the 2021 GMC Sierra 3500 HD tow?

The 2021 GMC Sierra 3500 HD has a maximum towing capacity of up to 20,000 pounds, depending on trim and equipment.

How many trims does the 2021 GMC Sierra 3500 HD come in?

The 2021 GMC Sierra 3500 HD is available in 5 trims (39 total configurations) across Truck (Crew Cab) and Truck (Regular Cab) and Truck (Double Cab) body styles with four wheel drive, rear wheel drive.

2021 GMC Sierra 3500 HD

5 trims · 39 configurations · Truck (Crew Cab), Truck (Regular Cab), Truck (Double Cab)

Starting MSRP

$37,100 – $67,500

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Pricing

How much should you pay for the GMC Sierra 3500 HD? Select a trim to update purchase and lease estimates.

MSRP by trim

Select a trim to update the payment estimates. MSRP is for each trim's base configuration and excludes destination, taxes, and options.

Purchase information

Based on Base

Total price (Base MSRP)

$37,100

Typical monthly

$735/mo

Avg. APR

7.00%

60-month loan estimate for good credit (rates as of 2026-07-11). Not a credit offer; actual APR varies by lender, credit, and dealer.

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Compare 2021 GMC Sierra 3500 HD trims

Base
14 configurations
MSRP
$37,100 – $45,700
Fuel economy (city/hwy)
—
Horsepower
401 hp
Torque
464 lb-ft
Engine
6.6L V8 gas
Seating
3
Drivetrain
RWD
Cargo (cu ft)
—
Max towing
14,500 lbs
SLE
14 configurations
MSRP
$42,200 – $50,200
Fuel economy (city/hwy)
—
Horsepower
401 hp
Torque
464 lb-ft
Engine
6.6L V8 gas
Seating
3
Drivetrain
RWD
Cargo (cu ft)
—
Max towing
14,500 lbs
SLT
6 configurations
MSRP
$54,000 – $58,200
Fuel economy (city/hwy)
—
Horsepower
401 hp
Torque
464 lb-ft
Engine
6.6L V8 gas
Seating
6
Drivetrain
RWD
Cargo (cu ft)
—
Max towing
20,000 lbs
AT4
2 configurations
MSRP
$59,600 – $59,800
Fuel economy (city/hwy)
—
Horsepower
401 hp
Torque
464 lb-ft
Engine
6.6L V8 gas
Seating
5
Drivetrain
4WD
Cargo (cu ft)
—
Max towing
20,000 lbs
Denali
3 configurations
MSRP
$66,100 – $67,500
Fuel economy (city/hwy)
—
Horsepower
401 hp
Torque
464 lb-ft
Engine
6.6L V8 gas
Seating
5
Drivetrain
4WD
Cargo (cu ft)
—
Max towing
20,000 lbs

Compare 2021 GMC Sierra 3500 HD trim specifications
Spec	Base14 configurations	SLE14 configurations	SLT6 configurations	AT42 configurations	Denali3 configurations
MSRP	$37,100 – $45,700	$42,200 – $50,200	$54,000 – $58,200	$59,600 – $59,800	$66,100 – $67,500
Fuel economy (city/hwy)	—	—	—	—	—
Horsepower	401 hp	401 hp	401 hp	401 hp	401 hp
Torque	464 lb-ft	464 lb-ft	464 lb-ft	464 lb-ft	464 lb-ft
Engine	6.6L V8 gas	6.6L V8 gas	6.6L V8 gas	6.6L V8 gas	6.6L V8 gas
Seating	3	3	6	5	5
Drivetrain	RWD	RWD	RWD	4WD	4WD
Cargo (cu ft)	—	—	—	—	—
Max towing	14,500 lbs	14,500 lbs	20,000 lbs	20,000 lbs	20,000 lbs

Specifications shown for each trim’s base configuration; drivetrain, cab, and box options vary within a trim, and MSRP shows the full range. MSRP excludes destination fees, taxes, and dealer-installed options.

Full specifications

Shown for each trim's base configuration. Drivetrain, cab, and box options within a trim can change dimensions, capacities, and fuel economy.

Engine & drivetrain

Engine type: Basegas
SLEgas
SLTgas
AT4gas
Denaligas
Fuel type: Baseregular unleaded
SLEregular unleaded
SLTregular unleaded
AT4regular unleaded
Denaliregular unleaded
Cylinders: BaseV8
SLEV8
SLTV8
AT4V8
DenaliV8
Displacement: Base6.6 L
SLE6.6 L
SLT6.6 L
AT46.6 L
Denali6.6 L
Horsepower: Base401 hp
SLE401 hp
SLT401 hp
AT4401 hp
Denali401 hp
Torque: Base464 lb-ft
SLE464 lb-ft
SLT464 lb-ft
AT4464 lb-ft
Denali464 lb-ft
Transmission: Base6-speed shiftable automatic
SLE6-speed shiftable automatic
SLT6-speed shiftable automatic
AT46-speed shiftable automatic
Denali6-speed shiftable automatic
Drivetrain: Baserear wheel drive
SLErear wheel drive
SLTrear wheel drive
AT4four wheel drive
Denalifour wheel drive

Dimensions

Body type: BaseTruck (Regular Cab)
SLETruck (Regular Cab)
SLTTruck (Crew Cab)
AT4Truck (Crew Cab)
DenaliTruck (Crew Cab)
Doors: Base2
SLE2
SLT4
AT44
Denali4
Seating: Base3
SLE3
SLT6
AT45
Denali5
Length: Base235.5 in
SLE235.5 in
SLT250.1 in
AT4250.1 in
Denali250.1 in
Width: Base81.8 in
SLE81.8 in
SLT81.9 in
AT481.9 in
Denali81.9 in
Height: Base80.9 in
SLE80.9 in
SLT80.9 in
AT480.9 in
Denali80.9 in
Wheelbase: Base141.6 in
SLE141.6 in
SLT158.9 in
AT4158.9 in
Denali158.9 in
Ground clearance: Base11.2 in
SLE11.2 in
SLT11.2 in
AT411.2 in
Denali11.2 in

Capacity & weight

Max towing: Base14,500 lbs
SLE14,500 lbs
SLT20,000 lbs
AT420,000 lbs
Denali20,000 lbs
Max payload: Base4,481 lbs
SLE4,481 lbs
SLT4,316 lbs
AT44,365 lbs
Denali4,365 lbs
Curb weight: Base6,231 lbs
SLE6,231 lbs
SLT6,647 lbs
AT46,947 lbs
Denali6,947 lbs
Fuel tank: Base36 gal
SLE36 gal
SLT36 gal
AT436 gal
Denali36 gal

Full specifications by trim
Spec	Base	SLE	SLT	AT4	Denali
Engine & drivetrain
Engine type	gas	gas	gas	gas	gas
Fuel type	regular unleaded	regular unleaded	regular unleaded	regular unleaded	regular unleaded
Cylinders	V8	V8	V8	V8	V8
Displacement	6.6 L	6.6 L	6.6 L	6.6 L	6.6 L
Horsepower	401 hp	401 hp	401 hp	401 hp	401 hp
Torque	464 lb-ft	464 lb-ft	464 lb-ft	464 lb-ft	464 lb-ft
Transmission	6-speed shiftable automatic	6-speed shiftable automatic	6-speed shiftable automatic	6-speed shiftable automatic	6-speed shiftable automatic
Drivetrain	rear wheel drive	rear wheel drive	rear wheel drive	four wheel drive	four wheel drive
Dimensions
Body type	Truck (Regular Cab)	Truck (Regular Cab)	Truck (Crew Cab)	Truck (Crew Cab)	Truck (Crew Cab)
Doors	2	2	4	4	4
Seating	3	3	6	5	5
Length	235.5 in	235.5 in	250.1 in	250.1 in	250.1 in
Width	81.8 in	81.8 in	81.9 in	81.9 in	81.9 in
Height	80.9 in	80.9 in	80.9 in	80.9 in	80.9 in
Wheelbase	141.6 in	141.6 in	158.9 in	158.9 in	158.9 in
Ground clearance	11.2 in	11.2 in	11.2 in	11.2 in	11.2 in
Capacity & weight
Max towing	14,500 lbs	14,500 lbs	20,000 lbs	20,000 lbs	20,000 lbs
Max payload	4,481 lbs	4,481 lbs	4,316 lbs	4,365 lbs	4,365 lbs
Curb weight	6,231 lbs	6,231 lbs	6,647 lbs	6,947 lbs	6,947 lbs
Fuel tank	36 gal	36 gal	36 gal	36 gal	36 gal