GMC Sierra 1500
GMC Sierra 1500 at Weirs GMC — Biddeford, Maine
The GMC Sierra 1500 is a full-size pickup truck built for capability, comfort, and confidence. With eight available trim levels, four engine options, and max towing capacity of 13,300 pounds, the Sierra 1500 serves every role — from daily workhorse to luxury highway cruiser to off-road performer.
Weirs Motor Sales in Biddeford, Maine has been a GMC dealer for over 65 years. We stock Sierra 1500 models across the full lineup and specialize in Denali, Denali Ultimate, AT4, and AT4X trims.
Current Sierra 1500 Model Year
Get the full breakdown of the latest Sierra 1500 — trim-by-trim pricing, engine specs, towing ratings, technology features, and what's changed:
Sierra 1500 Inventory at Weirs GMC
Browse our current selection of Sierra 1500 trucks. Filter by trim, engine, cab size, color, and price to find the right configuration.
Sierra 1500 Trim Levels
The Sierra 1500 lineup spans eight trims designed for different buyers and use cases.
Work and Value Trims
- Pro — The foundation of the lineup. Standard 2.7L TurboMax engine, 8-inch display, GMC Pro Safety suite. Available in Regular Cab, Double Cab, and Crew Cab. The only trim with the 8.2-foot long bed option.
- SLE — Adds the 13.4-inch touchscreen with Google Built-In, 12.3-inch driver display, heated front seats, heated steering wheel, and dual-zone climate control. Double Cab and Crew Cab configurations.
- Elevation — Builds on SLE with 20-inch wheels, LED fog lights, blacked-out exterior treatment, and available leather, Bose audio, and wireless charging.
Premium Trims
- SLT — Perforated leather seats, chrome accents, power-folding mirrors, and a refined interior. Crew Cab only.
- Denali — Standard 6.2L V8, 20-inch polished wheels, leather seating with heating and ventilation, Bose 12-speaker audio, 15-inch Head-Up Display, and available Super Cruise hands-free driving.
- Denali Ultimate — The flagship. Full-grain leather with massage seats, 22-inch Ultra-Bright wheels, Vader Chrome grille, power sunroof, and standard Super Cruise. The most refined Sierra 1500 available.
Off-Road Trims
- AT4 — Factory 2-inch lift, skid plates, Rancho shocks, hill descent control, and the 5.3L V8 standard. Built for trails, unpaved roads, and confident four-season driving.
- AT4X — Multimatic DSSV dampers, front and rear locking differentials, AEV steel bumper with winch prep, Goodyear MT tires, and the 6.2L V8 standard. The most capable off-road Sierra 1500.
Engine Options and Towing
Four powertrains are available across the Sierra 1500 lineup:
- 2.7L TurboMax I-4 — 310 hp, 430 lb-ft torque, up to 9,400 lbs towing. Best-in-class standard torque.
- 5.3L EcoTec3 V8 — 355 hp, 383 lb-ft torque, up to 11,200 lbs towing. Proven reliability.
- 6.2L EcoTec3 V8 — 420 hp, 460 lb-ft torque, up to 13,100 lbs towing. Maximum power.
- 3.0L Duramax Turbo-Diesel I-6 — 305 hp, 495 lb-ft torque, up to 13,300 lbs towing. Best efficiency and max towing.
Maximum payload reaches 2,230 pounds in the Regular Cab 2WD configuration with the TurboMax engine.
Read Our Sierra 1500 Towing Guide | Engine Comparison: Which Sierra 1500 Powertrain Is Right for You?
Sierra 1500 Key Features
Technology
- Google Built-In — Available on SLE and above. Google Maps, Google Assistant, and the Google Play Store are built into the 13.4-inch touchscreen. Works without a phone connection.
- Super Cruise — Hands-free highway driving available on Denali, Denali Ultimate, AT4, and AT4X. Compatible with over 400,000 miles of mapped highway in North America.
- Multi-Pro Tailgate — Standard on all Sierra 1500 models. Six configurations including a step, inner gate, and load-stop position. One of the most functional tailgate designs in the segment.
- 15-inch Head-Up Display — Available on Denali and Denali Ultimate. Projects navigation, speed, and driver assistance alerts onto the windshield.
Safety
- GMC Pro Safety — Standard on all trims. Includes forward collision alert, automatic emergency braking, lane keep assist, following distance indicator, and IntelliBeam automatic high beams.
- GMC Pro Safety Plus — Available on SLE and above. Adds HD surround vision, rear cross-traffic alert, side blind zone alert, and trailer side blind zone alert.
- Rear Camera Mirror — Available on higher trims. Replaces the rearview mirror with a live camera feed providing a wider, unobstructed view even with a full cab or towing.
Capability
- Max Trailering Package — Available on most trims. Increases towing capacity, adds trailer brake controller, and includes a dedicated tow/haul mode.
- Prograde Trailering System — Available on most trims. Includes jack-knife alert, trailer tire pressure monitoring, and 15 camera views to assist with hookup and towing.
- eAssist Mild Hybrid — Available on 5.3L V8 models. Improves fuel efficiency through regenerative braking and stop/start technology.
Common Questions About the GMC Sierra 1500
How much can a GMC Sierra 1500 tow?
The Sierra 1500 tows up to 13,300 pounds when properly equipped with the 3.0L Duramax diesel engine. Towing capacity ranges from 9,400 pounds (2.7L TurboMax) to 13,300 pounds depending on engine, drivetrain, and configuration. For a complete towing breakdown by engine and trim, see our Sierra 1500 Towing Guide.
What trim levels does the Sierra 1500 come in?
The Sierra 1500 is available in eight trims: Pro, SLE, Elevation, SLT, AT4, AT4X, Denali, and Denali Ultimate. They range from the work-focused Pro to the luxury-flagship Denali Ultimate. Our trim comparison guide breaks down the differences in detail.
What's the difference between AT4 and AT4X?
Both are off-road focused trims, but the AT4X is the more capable option. The AT4 comes standard with a 2-inch factory lift, skid plates, Rancho shocks, and the 5.3L V8. The AT4X builds on that with Multimatic DSSV dampers, locking front and rear differentials, AEV steel bumpers, Goodyear MT tires, and the 6.2L V8 as standard equipment. See our AT4 vs. AT4X guide for the full comparison.
Does the Sierra 1500 come with hands-free driving?
Yes. Super Cruise hands-free driving is available on Denali, Denali Ultimate, AT4, and AT4X trims. It enables hands-free highway driving on over 400,000 miles of compatible roads in the U.S. and Canada. A driver attention system ensures the driver remains engaged at all times.
What's the payload capacity of the Sierra 1500?
Maximum payload is 2,230 pounds in the Regular Cab 2WD configuration with the 2.7L TurboMax engine. Payload varies by cab size, engine, drivetrain, and trim. Check the window sticker or contact us for payload specs on a specific configuration.
Sierra 1500 at Weirs GMC in Biddeford, Maine
Weirs Motor Sales has served southern Maine and the Seacoast region for over 65 years. As a certified GMC dealer, we stock Sierra 1500 models across the full trim lineup with preferred access to factory orders for Denali, Denali Ultimate, AT4, and AT4X configurations.
Our service department is a GMC Certified Service center staffed by factory-trained technicians. We offer genuine GMC parts, scheduled maintenance, and warranty repairs.
Whether you're looking for a capable work truck, a luxury daily driver, or an off-road performer, the Sierra 1500 lineup has a trim built for your needs. Stop by Weirs GMC in Biddeford, Maine, or start browsing online.
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Sierra 1500 Guides and Resources
Explore our in-depth Sierra 1500 content to find the right truck for your needs:
- Sierra 1500 Towing Capacity Guide
- Denali vs. Denali Ultimate Comparison
- AT4 vs. AT4X: Which Off-Road Sierra Is Right for You?
- Best Engine for the Sierra 1500
- Sierra 1500 Trim Comparison
- Towing a Boat with the Sierra 1500 in Maine
- Super Cruise: How It Works and Where to Use It in Maine
- Sierra 1500 Safety Features Guide
- Sierra 1500 for Maine Winters