Vehicle highlights
- 4WD
- Apple CarPlay
- Android Auto
- Backup Camera
- Leather Seating
- Cruise Control
Price and listing details
Source pricing details
No advertised purchase price was provided. These source amounts are informational only and do not constitute an advertised selling price or purchase offer.
The dealer did not provide Car Handshake with an itemized fee breakdown.
- Stock number
- 326012A
- VIN
- 3GTU9EET7MG374825
- Seen in inventory
- Listing updated
Confirm availability and transaction details with the dealership.
Specifications
Overview
- Year
- 2021
- Make
- GMC
- Model
- Sierra 1500
- Trim
- AT4
- Condition
- Used
- Body
- Pickup
- Mileage
- 66,414 mi
Engine & drivetrain
- Fuel
- Diesel
- Driveline
- 4WD
- Transmission
- Automatic
- MPG
- City 22 / Hwy 26
- Displacement
- 3000 cc
- Engine
- 3L I-6 direct injection, DOHC, variable valve control, intercooled turbo, diesel, engine with 277HP
Exterior & interior
- Exterior color
- Red
- Interior color
- Black
Seating and powertrain
- Seats
- 5 seats
- Third row
- Not confirmed
- Powertrain
- Diesel
Seat count does not confirm a third row. Check unconfirmed details with the dealership.
Features
30 listedSafety
4
- Backup Camera
- Cruise Control
- Hill Start Assist
- Hill Descent Control
Comfort & interior
9
- Heated Front Seats
- Remote Start
- Leather Seating
- Ventilated Front Seats
- Heated Steering Wheel
- Push Button Start
Show all 9 featuresShow fewer features
- Power Driver Seat
- Keyless Entry
- Leather Steering Wheel
Technology
7
- Apple CarPlay
- Android Auto
- Bluetooth Audio
- Built-in Navigation
- Wireless Phone Charging
- Satellite Radio
Show all 7 featuresShow fewer features
- Touchscreen Display
Exterior & utility
9
- Trailer Hitch
- Trailer Brake Controller
- Alloy Wheels
- Fog Lights
- Heated Mirrors
- Tinted Windows
Show all 9 featuresShow fewer features
- Trailer Sway Control
- Skid Plates
- Power-Folding Mirrors
Performance
1
- Engine Stop-Start
Dealer notes
This pre-owned 2021 GMC Sierra 1500 AT4 crew cab 4WD arrives at Napleton Chevrolet Buick GMC in Beaver Dam wearing a bold red exterior over Jet Black perforated leather front seats with Kalahari accents — a diesel-powered off-road build that doubles as a capable trailering truck. Under the hood is the Duramax 3.0L turbo-diesel straight-six paired with a 10-speed automatic, giving it the low-end pull that Wisconsin towing and long highway stretches both reward.
At a glance: Duramax 3.0L turbo-diesel straight-six · 10-speed automatic · 4WD · crew cab short box · 66,400 miles · red exterior · Jet Black perforated leather with Kalahari accents
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The Preferred Equipment Group 4SB and the AT4 Preferred Package together put this truck well above a base AT4 build. For towing, it carries the ProGrade Trailering System, an integrated trailer brake controller, an auxiliary external transmission oil cooler, and a heavy-duty air filter — the core of a serious hitch setup.
Off the pavement, it rides on the AT4's off-road suspension, protected by skid plates, and finds traction through a 2-speed transfer case with auto-locking rear differential and hill descent control. Red recovery hooks are mounted and ready.
Inside, the front seats are heated and ventilated, and the second-row outboard seats are heated as well. The AT4 Preferred Package adds the Premium GMC Infotainment System with an 8-inch touchscreen and navigation, wireless charging, a Bose 7-speaker premium sound system, universal home remote, and a power sliding rear window with defogger.
A remote vehicle starter, keyless open and start, deep-tinted glass, and a 4G LTE wi-fi hotspot round out the daily-driver side of the build. Underfoot, front premium floor liners with removable carpet inserts and a spray-on bed liner with the AT4 logo protect the interior and cargo area.
The 20-inch machined aluminum wheels with carbon grey metallic accents wear LT265/60R20 Goodyear Wrangler Territory mud-terrain tires, and the truck also carries a full-size spare.
At 66,400 miles on a 2021 model, this truck has covered a normal amount of ground for its age. We encourage all buyers to review the full Carfax report, available on request.
Napleton Chevrolet Buick GMC is at N8167 Kellom Rd. in Beaver Dam — about 35 minutes from Fond du Lac and 45 minutes from Madison, and convenient to Mayville, Watertown, Columbus and Randolph. Napleton has been a family-owned dealer group for over 80 years, and the process here is straightforward: no pressure, no runaround.
If you're ready to put this diesel AT4 to work, the hitch and the trail are both waiting.
Dealership location
Napleton Chevrolet Buick GMC Beaver Dam
Dealer: Napleton Autos
N8167 Kellom Rd, Beaver Dam, WI, 53916
