Used 2021 GMCSierra 1500 AT4
- Diesel
- Exterior Color
- Satin Steel
- Interior Color
- Jet Black
- Odometer
- 83,619 miles
- Fuel Economy
- 14/19 MPG City/Hwy
- Transmission
- Automatic
- Drivetrain
- 4x4
- Engine
- I-6 cyl
- VIN
- 3GTU9EET3MG136079
- Stock Number
- P136079
GMC
Sierra 1500
Included Packages & Accessories
- Power Sunroof
- 3.23 Rear Axle Ratio
- Heated 2nd Row Outboard Seats
- Automatic Stop/Start
- Transmission: 10-Speed Automatic
- Federal Emissions Override
- CT/DE/ME/MD/MA/NJ/NY/OR/PA/RI/VT/WA Emissions Req
- HD Radio
- Front License Plate Kit
- 265/70R17SL AS BW Spare Tire
- Preferred Equipment Group 4SB
- Radio: Premium GMC Infotainment Sys w/Multi-Touch
- 6-Speaker Audio System Feature
- SiriusXM w/360L
- Floor-Mounted Center Console
- Compass
- 4.2" Diagonal Color Display Driver Info Center
- Electric Rear-Window Defogger
- Power Door Locks
- Remote Vehicle Starter System
- Keyless Open & Start
- Color-Keyed Carpeting Floor Covering
- Front Prem Floor Liners w/Removable Carpet Insert
- Rear Prem Floor Liners w/Removable Carpet Insert
- OnStar & GMC Connected Services Capable
- 4G LTE Wi-Fi Hotspot Capable
- GMC Connected Access Capable
- 12-Volt Rear Auxiliary Power Outlet
- 120-Volt Instrument Panel Power Outlet
- 120-Volt Bed Mounted Power Outlet
- 2 USB Ports
- Rear Dual USB Charging-Only Ports
- HD Rear Vision Camera
- Heated Driver & Front Outboard Passenger Seating
- Ventilated Driver & Front Passenger Seats
- Steering Wheel Audio Controls
- Manual Tilt-Wheel & Telescoping Steering Column
- Electrical Lock Control Steering Column
- Theft Deterrent System
- Power Front Windows w/Driver Express Up/Down
- Power Front Passenger Windows w/Express Up/Down
- Power Rear Windows w/Express Down
- Spray-On Pickup Bed Liner w/AT4 Logo
- Deep-Tinted Glass
- Body-Color Surround Grille
- LED Cargo Area Lighting
- Red Recovery Hooks
- Tires: 265/65R18SL AT BW
- Wheels: 18" x 8.5" Machined Aluminum
- Rear Wheelhouse Liners
- Trailering Package
- Hitch Guidance
- ProGrade Trailering System
- Hitch Guidance w/Hitch View
- In-Vehicle Trailering App
- 170 Amp Alternator
- Heavy-Duty Air Filter
- Auxiliary External Transmission Oil Cooler
- Auto-Locking Rear Differential
- Hill Descent Control
- Skid Plates
- Off-Road Suspension
- Integrated Trailer Brake Controller
- 2-Speed Transfer Case
- 10-Way Power Driver Seat Adjuster w/Lumbar
- Driver Memory
- Power Sliding Rear Window w/Rear Defogger
- Front Bucket Seats
- 10-Way Power Passenger Seat Adjuster w/Lumbar
- GVWR: 7,100 lbs
- Technology Package
- HD Surround Vision w/2 Trailer View Camera Provisions
- Rear Camera Mirror
- Bed View Camera
- Multicolor 15" Diagonal Head-Up Display
- 8" Driver Information Center
- Safety Alert Seat
- Radio: Premium GMC Infotainment Sys w/Navigation
- Engine Block Heater
- Wireless Charging
- Adaptive Cruise Control
- 220 Amp Alternator
- Engine: Duramax 3.0L Turbo-Diesel I6
- 850 Heavy-Duty Battery
- Delete External Engine Oil Cooler
- AT4 Premium Package
- AT4 Preferred Package
- Universal Home Remote
- Premium Bose 7-Speaker Sound System
- Tires: LT275/65R18C MT BW
- Driver Alert Package I
- Ultrasonic Front & Rear Park Assist
- Lane Change Alert w/Side Blind Zone Alert
- Rear Cross Traffic Alert
- Perimeter Lighting
- AT4 High Clearance Step
- Driver Alert Package II
- Forward Collision Alert
- Lane Keep Assist w/Lane Departure Warning
- Automatic Emergency Braking
- Front Pedestrian Braking
- IntelliBeam Automatic High Beam On/Off
- Following Distance Indicator
Included Packages & Options
- AT4 Premium Package$3,200
- AT4 Preferred Package
- Tires: LT275/65R18C MT BW
- Driver Alert Package I
- AT4 High Clearance Step
- Technology Package$2,075
- HD Surround Vision w/2 Trailer View Camera Provisions
- Rear Camera Mirror
- Bed View Camera
- Multicolor 15" Diagonal Head-Up Display
- 8" Driver Information Center
- AT4 Preferred Package$1,420
- Universal Home Remote
- Power Sliding Rear Window w/Rear Defogger
- Radio: Premium GMC Infotainment Sys w/Navigation
- Premium Bose 7-Speaker Sound System
- Wireless Charging
- Driver Alert Package II$1,095
- Forward Collision Alert
- Lane Keep Assist w/Lane Departure Warning
- Automatic Emergency Braking
- Front Pedestrian Braking
- IntelliBeam Automatic High Beam On/Off
- Adaptive Cruise Control
- Following Distance Indicator
- Safety Alert Seat
- Engine: Duramax 3.0L Turbo-Diesel I6$995
- 220 Amp Alternator
- Engine Block Heater
- 850 Heavy-Duty Battery
- Delete External Engine Oil Cooler
- GVWR: 7,100 lbs
- Driver Alert Package I$890
- Ultrasonic Front & Rear Park Assist
- Lane Change Alert w/Side Blind Zone Alert
- Rear Cross Traffic Alert
- Perimeter Lighting
Included Options
- Power Sunroof$995
Detailed Specifications
- Max seating capacity: 5
- Fuel System: Direct Injection
- Fuel tank capacity: 24 gal
- Horsepower: 277
Standard Features
- AT4 Preferred Package
- Tires: LT275/65R18C MT BW
- Driver Alert Package I
- AT4 High Clearance Step
- HD Surround Vision w/2 Trailer View Camera Provisions
- Rear Camera Mirror
- Bed View Camera
- Multicolor 15" Diagonal Head-Up Display
- 8" Driver Information Center
- Universal Home Remote
- Power Sliding Rear Window w/Rear Defogger
- Radio: Premium GMC Infotainment Sys w/Navigation
- Premium Bose 7-Speaker Sound System
- Wireless Charging
- Forward Collision Alert
- Lane Keep Assist w/Lane Departure Warning
- Automatic Emergency Braking
- Front Pedestrian Braking
- IntelliBeam Automatic High Beam On/Off
- Adaptive Cruise Control
- Following Distance Indicator
- Safety Alert Seat
- 220 Amp Alternator
- Engine Block Heater
- 850 Heavy-Duty Battery
- Delete External Engine Oil Cooler
- GVWR: 7,100 lbs
- Ultrasonic Front & Rear Park Assist
- Lane Change Alert w/Side Blind Zone Alert
- Rear Cross Traffic Alert
- Perimeter Lighting
- SiriusXM w/360L
- 10-Way Power Driver Seat Adjuster w/Lumbar
- 10-Way Power Passenger Seat Adjuster w/Lumbar
- Driver Memory
- Rear Prem Floor Liners w/Removable Carpet Insert
- 120-Volt Bed Mounted Power Outlet
- 6-Speaker Audio System Feature
- SiriusXM w/360L
- Radio: Premium GMC Infotainment Sys w/Multi-Touch
- Floor-Mounted Center Console
- Compass
- 4.2" Diagonal Color Display Driver Info Center
- Electric Rear-Window Defogger
- Power Door Locks
- Remote Vehicle Starter System
- Keyless Open & Start
- Color-Keyed Carpeting Floor Covering
- Front Prem Floor Liners w/Removable Carpet Insert
- OnStar & GMC Connected Services Capable
- 4G LTE Wi-Fi Hotspot Capable
- GMC Connected Access Capable
- 12-Volt Rear Auxiliary Power Outlet
- 120-Volt Instrument Panel Power Outlet
- 2 USB Ports
- Rear Dual USB Charging-Only Ports
- HD Rear Vision Camera
- Heated Driver & Front Outboard Passenger Seating
- Ventilated Driver & Front Passenger Seats
- Steering Wheel Audio Controls
- Manual Tilt-Wheel & Telescoping Steering Column
- Electrical Lock Control Steering Column
- Theft Deterrent System
- Power Front Windows w/Driver Express Up/Down
- Power Front Passenger Windows w/Express Up/Down
- Power Rear Windows w/Express Down
- Spray-On Pickup Bed Liner w/AT4 Logo
- Deep-Tinted Glass
- Body-Color Surround Grille
- LED Cargo Area Lighting
- Red Recovery Hooks
- Tires: 265/65R18SL AT BW
- Wheels: 18" x 8.5" Machined Aluminum
- Rear Wheelhouse Liners
- Trailering Package
- ProGrade Trailering System
- 170 Amp Alternator
- Heavy-Duty Air Filter
- Auxiliary External Transmission Oil Cooler
- Auto-Locking Rear Differential
- Hill Descent Control
- Skid Plates
- Off-Road Suspension
- Integrated Trailer Brake Controller
- 2-Speed Transfer Case
- Hitch Guidance
- Hitch Guidance w/Hitch View
- In-Vehicle Trailering App
Dealer Notes
Satin Steel Metallic 2021 GMC Sierra 1500 AT4 4WD 10-Speed Automatic 3.0L I6 FREE DELIVERY ANYWHERE IN COLORADO, LEATHER SEATS, HEATED FRONT SEATS, LOCAL TRADE IN, COME TEST DRIVE!, SET YOUR TEST DRIVE APPOINTMENT TODAY, 10-Speed Automatic, 4WD, Jet Black With Kalahari Accents Leather.Proudly serving Longmont, Boulder, Denver, Loveland, Erie, Fort Collins, Thornton, Westminster, Lakewood, Broomfield, Golden, Brighton, and Greeley. Recent Arrival! 22/26 City/Highway MPG
KBB.com Consumer Reviews

Overall4Out of 5
- 3.0
Nice truck
By froggy | on Sunday, December 06, 2020
I purchased this truck brand new and at 3900 miles I started to have a misfire. The warranty put a refurbished rebuilt engine in it. I was not aware that the warranty doesn't put new parts in just refurbished rebuilt parts. I traded in and lost my favorite blue truck. Not a fan of the whole process. Love the truck just not how the warranty went. I would not own another brand or model the 2020 is the nicest riding and looking. Just got a bad motor from the manufacture.… - 5.0
Great Truck
By Mel | on Sunday, April 25, 2021
I love it, I get compliments every where I go, and it apparently worth more than I paid for it brand new, a year and a half later. can't ask for much more than that.… - 5.0
Well done GM
By Tony | on Thursday, November 26, 2020
This truck has a 10 speed transmission that you can barely feel it shift. Traded in an F150 and test drove a similar equipped Ram. Although the Ram was nice, the styling of the GMC won me over, along with the tailgate! It also pulls my boat way better than the Ford, just smoother all around. The cabin is very quiet and the gas mileage is much better than V8 Ford. The cabin is super quiet and the ride is awesome. Love the adaptive cruise control too. The technology is fine and the screen is plenty big. Remember, you are driving this truck, not going to thr drive in! Most importantly, the controls are simple to use and Bose stereo sounds great! Oh, and I got it cheaper than the similar Ram too!…
Based on 89 consumer ratings for 2019–2026 models. | Privacy
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