Sales Department Hours
Monday: 08:00 AM - 05:30 PM
Tuesday: 08:00 AM - 05:30 PM
Wednesday: 08:00 AM - 05:30 PM
Thursday: 08:00 AM - 05:30 PM
Friday: 08:00 AM - 05:30 PM
Saturday: 08:00 AM - 03:00 PM
Sunday: Closed
Service Department Hours
Monday: 08:00 AM - 05:00 PM
Tuesday: 08:00 AM - 05:00 PM
Wednesday: 08:00 AM - 05:00 PM
Thursday: 08:00 AM - 05:00 PM
Friday: 08:00 AM - 05:00 PM
Saturday: 08:00 AM - 03:00 PM
Sunday: Closed
Parts Department Hours
Monday: 08:00 AM - 05:00 PM
Tuesday: 08:00 AM - 05:00 PM
Wednesday: 08:00 AM - 05:00 PM
Thursday: 08:00 AM - 05:00 PM
Friday: 08:00 AM - 05:00 PM
Saturday: Closed
Sunday: Closed
Disclaimer:
New vehicle pricing includes all offers and incentives. Tax, Title and Tags not included in vehicle prices shown and must be paid by the purchaser. While great effort is made to ensure the accuracy of the information on this site, errors do occur so please verify information with a customer service rep. This is easily done by calling us at 406-344-7791 or by visiting us at the dealership.
**With approved credit. Terms may vary. Monthly payments are only estimates derived from the vehicle price with a 72 month term, 5.9% interest and 20% downpayment.
4500 US Highway 2 W
Havre, MT 59501
Sales: 406-344-7791
Service: 406-344-1997
Parts: 406-344-7745
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Summary
2020 GMC Sierra 1500 AT4 4WD in Havre, MT ? powerful 6.2L V8 with AT4 suspension, skid protection, and Off-Road Package for confident towing and off-road performance.
CARFAX 1-Owner, well-maintained; features Apple CarPlay, steering-wheel audio controls, and remote start for comfort and convenience.
Priced to sell ? schedule a test drive to experience its capability, tech, and trail-ready durability.
Vehicle Details
2020 GMC Sierra 1500 AT4 4WD ? V8 6.2L, located in Havre MT. This rugged, refined truck delivers premium capability and confident off-road performance at the best price in the area. With a CARFAX 1-Owner history, this GMC Sierra AT4 has been well cared for and offers like-new reliability combined with genuine value. Under the hood, the powerful 6.2L V8 gasoline engine provides strong towing and hauling capacity while the 4WD system and Off-Road Package tackle rough terrain with ease. The AT4's suspension and skid protection are engineered for trail-ready durability, so you can head off the beaten path with confidence. Inside, modern tech keeps you connected and comfortable. Apple CarPlay integration and Steering Wheel Audio Controls put entertainment and navigation at your fingertips, while Remote Start adds convenience during Montana's changing seasons. The cabin balances rugged styling with thoughtful amenities for daily driving and long trips alike. This GMC Sierra AT4 stands out for combining toughness, technology, and a verified single-owner history?making it a smart choice for buyers seeking capability without compromise. Located in Havre MT and priced to move, this 2020 GMC Sierra 1500 AT4 is ready to work, play, and explore. Schedule a test drive today and experience the power, comfort, and off-road readiness of this exceptional truck.
Equipment
Apple CarPlay: Seamless smartphone integration for this model - stay connected and entertained on the go! See what's behind you with the back up camera on this model. Never get into a cold vehicle again with the remote start feature on this vehicle. The installed navigation system will keep you on the right path. This GMC Sierra is equipped with the latest generation of XM/Sirius Radio. The state of the art park assist system will guide you easily into any spot. This vehicle features a hands-free Bluetooth phone system. The GMC Sierra has satellite radio capabilities. An off-road package is equipped on this 1/2 ton pickup. The HID headlamps on this GMC Sierra light your way like never before. The GMC Sierra features a high end BOSE stereo system. The leather seats in this model are a must for buyers looking for comfort, durability, and style. This vehicle features steering wheel audio controls. with XM/Sirus Satellite Radio you are no longer restricted by poor quality local radio stations while driving this GMC Sierra. Anywhere on the planet, you will have hundreds of digital stations to choose from.
Packages
Driver Alert Package I: Ultrasonic Front and Rear Park Assist; Rear Cross Traffic Alert; Perimeter Lighting; Lane Change Alert with Side Blind Zone Alert. AT4 Premium Package: 6" Rectangular Black Tubular Assist Steps; LT275/65R18C MT BW Tires. Preferred Equipment Group 4SB: Hitch Guidance; 2 USB Ports (1st Row); Electric Rear-Window Defogger; Theft Deterrent System (unauthorized Entry); Body-Color Surround Grille; High-Capacity Air Filter; Skid Plates; Compass; 4.2" Diagonal Color Display Driver Info Center; 120-Volt Instrument Panel Power Outlet; Heated Driver and Front Outboard Passenger Seating; Color-Keyed Carpeting Floor Covering; OnStar and GMC Connected Services Capable; Heated 2nd Row Outboard Seats; Power Front Passenger Windows with Express Up/down; All-Weather Floor Liners with AT4 Logo; Power Rear Windows with Express Down; Integrated Trailer Brake Controller; Ventilated Driver and Front Passenger Seats; 18" X 8.5" Machined Aluminum Wheels; Manual Tilt-Wheel and Telescoping Steering Column; HD Rear Vision Camera; LED Cargo Area Lighting; Remote Vehicle Starter System; Hill Descent Control; Floor-Mounted Center Console; 170 Amp Alternator; Auxiliary External Transmission Oil Cooler; Electrical Lock Control Steering Column; Trailering Package; Off-Road Suspension; Steering Wheel Audio Controls; GMC Connected Access Capable; 2-Speed Transfer Case; Deep-Tinted Glass; Spray-On Pickup Bed Liner with AT4 Logo; HD Radio; Red Recovery Hooks; Power Front Windows with Driver Express Up/down; Rear Dual USB Charging-Only Ports; Keyless Open and Start; 4G LTE Wi-Fi Hotspot Capable; ProGrade Trailering System; Rear Wheelhouse Liners; 12-Volt Rear Auxiliary Power Outlet; 2 USB Ports; Heavy-Duty Rear Locking Differential; Power Door Locks. AT4 Preferred Package: Premium Bose 7-Speaker Sound System; Power Sliding Rear Window with Rear Defogger; Wireless Charging; Universal Home Remote; Premium GMC Infotainment System Radio with Navigation. Power Sunroof. 6" Rectangular Black Tubular Assist Steps. LT275/65R18C MT BW Tires. Front and Rear Black Molded Splash Guards. **Equipment listed is based on original vehicle build and subject to change. Please confirm the accuracy of the included equipment by calling the dealer prior to purchase.**Driver Alert Package I: Ultrasonic Front and Rear Park Assist; Rear Cross Traffic Alert; Perimeter Lighting; Lane Change Alert with Side Blind Zone Alert. AT4 Premium Package: 6" Rectangular Black Tubular Assist Steps; LT275/65R18C MT BW Tires. Preferred Equipment Group 4SB: Hitch Guidance; 2 USB Ports (1st Row); Electric Rear-Window Defogger; Theft Deterrent System (unauthorized Entry); Body-Color Surround Grille; High-Capacity Air Filter; Skid Plates; Compass; 4.2" Diagonal Color Display Driver Info Center; 120-Volt Instrument Panel Power Outlet; Heated Driver and Front Outboard Passenger Seating; Color-Keyed Carpeting Floor Covering; OnStar and GMC Connected Services Capable; Heated 2nd Row Outboard Seats; Power Front Passenger Windows with Express Up/down; All-Weather Floor Liners with AT4 Logo; Power Rear Windows with Express Down; Integrated Trailer Brake Controller; Ventilated Driver and Front Passenger Seats; 18" X 8.5" Machined Aluminum Wheels; Manual Tilt-Wheel and Telescoping Steering Column; HD Rear Vision Camera; LED Cargo Area Lighting; Remote Vehicle Starter System; Hill Descent Control; Floor-Mounted Center Console; 170 Amp Alternator; Auxiliary External Transmission Oil Cooler; Electrical Lock Control Steering Column; Trailering Package; Off-Road Suspension; Steering Wheel Audio Controls; GMC Connected Access Capable; 2-Speed Transfer Case; Deep-Tinted Glass; Spray-On Pickup Bed Liner with AT4 Logo; HD Radio; Red Recovery Hooks; Power Front Windows with Driver Express Up/down; Rear Dual USB Charging-Only Ports; Keyless Open and Start; 4G LTE Wi-Fi Hotspot Capable; ProGrade Trailering System; Rear Wheelhouse Liners; 12-Volt Rear Auxiliary Power Outlet; 2 USB Ports; Heavy-Duty Rear Locking Differential; Power Door Locks. AT4 Preferred Package: Premium Bose 7-Speaker Sound System; Power Sliding Rear Window with Rear Defogger; Wireless Charging; Universal Home Remote; Premium GMC Infotainment System Radio with Navigation. Power Sunroof. 6" Rectangular Black Tubular Assist Steps. LT275/65R18C MT BW Tires. Front and Rear Black Molded Splash Guards. **Equipment listed is based on original vehicle build and subject to change. Please confirm the accuracy of the included equipment by calling the dealer prior to purchase.**
Additional Information
**Vehicle Options listed are when the unit was originally built. Please confirm the accuracy of the included equipment by calling the dealer prior to purchase.
Disclaimer:
New vehicle pricing includes all offers and incentives. Tax, Title and Tags not included in vehicle prices shown and must be paid by the purchaser. While great effort is made to ensure the accuracy of the information on this site, errors do occur so please verify information with a customer service rep. This is easily done by calling us at 406-344-7791 or by visiting us at the dealership.
**With approved credit. Terms may vary. Monthly payments are only estimates derived from the vehicle price with a 72 month term, 5.9% interest and 20% downpayment.
©2026. Tilleman Motor Co.. All Rights Reserved.
While great effort is made to ensure the accuracy of the information on this site, errors can occur. Please verify all pricing and installed equipment information with a customer service representative. Customer may not qualify for all rebates shown. This is easily done by calling us or visiting us at the dealership.
We improve our products and advertising by using Microsoft Clarity to see how you use our website. By using our site, you agree that we and Microsoft can collect and use this data. Ourprivacy statementhas more details.
While great effort is made to ensure the accuracy of the information on this site, errors can occur. Please verify all pricing and installed equipment information with a customer service representative. This is easily done by calling us or visiting us at the dealership.
Customer may not qualify for ALL Rebates shown. Some rebates are stackable and others can and cannot be combined. See Dealer For Complete Details.
We improve our products and advertising by using Microsoft Clarity to see how you use our website. By using our site, you agree that we and Microsoft can collect and use this data. Our privacy statement has more details.
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Summary
2020 GMC Sierra 1500 AT4 4WD in Havre, MT ? powerful 6.2L V8 with AT4 suspension, skid protection, and Off-Road Package for confident towing and off-road performance.
CARFAX 1-Owner, well-maintained; features Apple CarPlay, steering-wheel audio controls, and remote start for comfort and convenience.
Priced to sell ? schedule a test drive to experience its capability, tech, and trail-ready durability.
Vehicle Details
2020 GMC Sierra 1500 AT4 4WD ? V8 6.2L, located in Havre MT. This rugged, refined truck delivers premium capability and confident off-road performance at the best price in the area. With a CARFAX 1-Owner history, this GMC Sierra AT4 has been well cared for and offers like-new reliability combined with genuine value. Under the hood, the powerful 6.2L V8 gasoline engine provides strong towing and hauling capacity while the 4WD system and Off-Road Package tackle rough terrain with ease. The AT4's suspension and skid protection are engineered for trail-ready durability, so you can head off the beaten path with confidence. Inside, modern tech keeps you connected and comfortable. Apple CarPlay integration and Steering Wheel Audio Controls put entertainment and navigation at your fingertips, while Remote Start adds convenience during Montana's changing seasons. The cabin balances rugged styling with thoughtful amenities for daily driving and long trips alike. This GMC Sierra AT4 stands out for combining toughness, technology, and a verified single-owner history?making it a smart choice for buyers seeking capability without compromise. Located in Havre MT and priced to move, this 2020 GMC Sierra 1500 AT4 is ready to work, play, and explore. Schedule a test drive today and experience the power, comfort, and off-road readiness of this exceptional truck.
Equipment
Apple CarPlay: Seamless smartphone integration for this model - stay connected and entertained on the go! See what's behind you with the back up camera on this model. Never get into a cold vehicle again with the remote start feature on this vehicle. The installed navigation system will keep you on the right path. This GMC Sierra is equipped with the latest generation of XM/Sirius Radio. The state of the art park assist system will guide you easily into any spot. This vehicle features a hands-free Bluetooth phone system. The GMC Sierra has satellite radio capabilities. An off-road package is equipped on this 1/2 ton pickup. The HID headlamps on this GMC Sierra light your way like never before. The GMC Sierra features a high end BOSE stereo system. The leather seats in this model are a must for buyers looking for comfort, durability, and style. This vehicle features steering wheel audio controls. with XM/Sirus Satellite Radio you are no longer restricted by poor quality local radio stations while driving this GMC Sierra. Anywhere on the planet, you will have hundreds of digital stations to choose from.
Packages
Driver Alert Package I: Ultrasonic Front and Rear Park Assist; Rear Cross Traffic Alert; Perimeter Lighting; Lane Change Alert with Side Blind Zone Alert. AT4 Premium Package: 6" Rectangular Black Tubular Assist Steps; LT275/65R18C MT BW Tires. Preferred Equipment Group 4SB: Hitch Guidance; 2 USB Ports (1st Row); Electric Rear-Window Defogger; Theft Deterrent System (unauthorized Entry); Body-Color Surround Grille; High-Capacity Air Filter; Skid Plates; Compass; 4.2" Diagonal Color Display Driver Info Center; 120-Volt Instrument Panel Power Outlet; Heated Driver and Front Outboard Passenger Seating; Color-Keyed Carpeting Floor Covering; OnStar and GMC Connected Services Capable; Heated 2nd Row Outboard Seats; Power Front Passenger Windows with Express Up/down; All-Weather Floor Liners with AT4 Logo; Power Rear Windows with Express Down; Integrated Trailer Brake Controller; Ventilated Driver and Front Passenger Seats; 18" X 8.5" Machined Aluminum Wheels; Manual Tilt-Wheel and Telescoping Steering Column; HD Rear Vision Camera; LED Cargo Area Lighting; Remote Vehicle Starter System; Hill Descent Control; Floor-Mounted Center Console; 170 Amp Alternator; Auxiliary External Transmission Oil Cooler; Electrical Lock Control Steering Column; Trailering Package; Off-Road Suspension; Steering Wheel Audio Controls; GMC Connected Access Capable; 2-Speed Transfer Case; Deep-Tinted Glass; Spray-On Pickup Bed Liner with AT4 Logo; HD Radio; Red Recovery Hooks; Power Front Windows with Driver Express Up/down; Rear Dual USB Charging-Only Ports; Keyless Open and Start; 4G LTE Wi-Fi Hotspot Capable; ProGrade Trailering System; Rear Wheelhouse Liners; 12-Volt Rear Auxiliary Power Outlet; 2 USB Ports; Heavy-Duty Rear Locking Differential; Power Door Locks. AT4 Preferred Package: Premium Bose 7-Speaker Sound System; Power Sliding Rear Window with Rear Defogger; Wireless Charging; Universal Home Remote; Premium GMC Infotainment System Radio with Navigation. Power Sunroof. 6" Rectangular Black Tubular Assist Steps. LT275/65R18C MT BW Tires. Front and Rear Black Molded Splash Guards. **Equipment listed is based on original vehicle build and subject to change. Please confirm the accuracy of the included equipment by calling the dealer prior to purchase.**Driver Alert Package I: Ultrasonic Front and Rear Park Assist; Rear Cross Traffic Alert; Perimeter Lighting; Lane Change Alert with Side Blind Zone Alert. AT4 Premium Package: 6" Rectangular Black Tubular Assist Steps; LT275/65R18C MT BW Tires. Preferred Equipment Group 4SB: Hitch Guidance; 2 USB Ports (1st Row); Electric Rear-Window Defogger; Theft Deterrent System (unauthorized Entry); Body-Color Surround Grille; High-Capacity Air Filter; Skid Plates; Compass; 4.2" Diagonal Color Display Driver Info Center; 120-Volt Instrument Panel Power Outlet; Heated Driver and Front Outboard Passenger Seating; Color-Keyed Carpeting Floor Covering; OnStar and GMC Connected Services Capable; Heated 2nd Row Outboard Seats; Power Front Passenger Windows with Express Up/down; All-Weather Floor Liners with AT4 Logo; Power Rear Windows with Express Down; Integrated Trailer Brake Controller; Ventilated Driver and Front Passenger Seats; 18" X 8.5" Machined Aluminum Wheels; Manual Tilt-Wheel and Telescoping Steering Column; HD Rear Vision Camera; LED Cargo Area Lighting; Remote Vehicle Starter System; Hill Descent Control; Floor-Mounted Center Console; 170 Amp Alternator; Auxiliary External Transmission Oil Cooler; Electrical Lock Control Steering Column; Trailering Package; Off-Road Suspension; Steering Wheel Audio Controls; GMC Connected Access Capable; 2-Speed Transfer Case; Deep-Tinted Glass; Spray-On Pickup Bed Liner with AT4 Logo; HD Radio; Red Recovery Hooks; Power Front Windows with Driver Express Up/down; Rear Dual USB Charging-Only Ports; Keyless Open and Start; 4G LTE Wi-Fi Hotspot Capable; ProGrade Trailering System; Rear Wheelhouse Liners; 12-Volt Rear Auxiliary Power Outlet; 2 USB Ports; Heavy-Duty Rear Locking Differential; Power Door Locks. AT4 Preferred Package: Premium Bose 7-Speaker Sound System; Power Sliding Rear Window with Rear Defogger; Wireless Charging; Universal Home Remote; Premium GMC Infotainment System Radio with Navigation. Power Sunroof. 6" Rectangular Black Tubular Assist Steps. LT275/65R18C MT BW Tires. Front and Rear Black Molded Splash Guards. **Equipment listed is based on original vehicle build and subject to change. Please confirm the accuracy of the included equipment by calling the dealer prior to purchase.**
Additional Information
**Vehicle Options listed are when the unit was originally built. Please confirm the accuracy of the included equipment by calling the dealer prior to purchase.