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After a complete redesign in 2014 that helped it earn a Consumers Guide Automotive Best Buy award and Kelley Blue Book's 5-Year Cost to Own award, the Sierra 1500 adds an all-new eight-speed automatic transmission to its powertrain roster. It is included on models equipped with the EcoTec3 6.2L V-8 engine Sierra's new eight-speed automatic helps the pickup retain its 12,000-pound maximum trailering rating under newly adapted SAE J2807 Recommended Practices. Additionally, the entire lineup is avail - able with several features engineered for serious towing, including the available NHT max trailering package, which features a 9.76-inch rear axle, heavy-duty rear springs, revised shock tuning, enhanced cooling and an integrated trailer brake controller to optimize capability and comfort when trailering. Magnetic ride control is a new, exclusive standard feature for the distinc- tive Sierra Denali. It delivers more precise body motion control by "reading" the road every millisecond and changing damping in just five milliseconds. Sierra Denali is the only full-size truck to offer magnetic ride control; and, along with the available 6.2L V-8 and new eight-speed automatic transmission, solidifies its position as the most refined, technically ad- vanced truck on the market. SIERRA LINEUP The 2015 Sierra 1500 range includes regular cab and two four-door cabs — the double cab and crew cab — body styles, all offered with 4WD. Models and trim levels the standard model, SLE, SLT and Denali (regu- lar cab offered only in standard and SLE trims). The off-road-inspired All Terrain package is offered on double cab and crew cab models with SLE or SLT trim and includes the Z71 Off Road suspension. Regular cab models are available with a 6'6" box or an 8' box. Double cab models are offered exclusively with the 6'6" box, while crew cabs are available with a 5'8" box or the 6'6" box. SIERRA DENALI DETAILS The distinctive Sierra Denali delivers GMC capability with unique design cues and exclusive features. On the exterior it wears a signature Denali chrome grille, unique 20-inch wheels, unique interior decorative trim, a polished stainless-steel exhaust outlet and body-color front and rear bumpers. Denali-specific interior details include script on the bright door sills and embossed into the front seats and real aluminum trim. OFF ROAD-INSPIRED ALL-TERRAIN Sierra All-Terrain blends capability with unique style, including a paint- ed grille and less chrome than other Sierra models. It is available on double cab and crew cab models with SLE or SLT trim. SIERRA DESIGN AND EXTERIOR FEATURES Sierra's exterior design is refined and aerodynamic, helping reduce wind noise in the cabin and enhancing efficiency on the highway. Inlaid doors fit into body sides rather than wrapping over the roof and combine with triple door seals to reduce wind noise and turbulence, helping quiet the cab. Also, the front of the truck is carefully sealed to provide efficient cooling with minimal aerodynamic drag. SIERRA INTERIOR DETAILS The Sierra's interior is roomy, quiet and functional, with a strong cab structure the foundation for its refinement. Nearly two-thirds of the cab is made of high-strength steel, while shear-style body mounts are used to tune out both up-and-down and side-to-side movement for a quiet, comfortable ride. Double and crew cab models have a set of hydraulic body mounts to further isolate the cabs. All models feature an upright instrument panel with a six-gauge in - strument cluster and multiple storage options. The controls are logically placed and easy to operate with work gloves on. ECOTEC3 POWERTRAINS The Sierra's trio of EcoTec3 engines — a 4.3L V-6, 5.3L V-8 and 6.2L V-8 — is designed to balance confident performance with efficiency. The 4.3L V-6 is SAE-certified at 285 horsepower and 305 lb.-ft. of torque — the most torque of any standard V-6. The 5.3L V-8 is SAE-certified at 355 horsepower and 383 lb.-ft. of torque. With EPA-estimated fuel economy of 23 mpg highway (2WD), it offers the best fuel economy of any V-8 pickup, and beats the fuel economy estimates of the Ford EcoBoost V-6. The 6.2L V-8 is the most power engine offered in any light-du - ty pickup truck, with SAE-certified 420 horsepower and 460 lb-ft of torque. It is available with SLT and Denali, and matched with the 8L90 eight-speed transmission. The Max Trailering Package is available on 2WD and 4WD V-8 crew cab and double cab models and includes a 9.76-inch rear axle, heavy- duty rear springs, revised shock tuning for increased control, enhanced cooling and an integrated trailer brake controller. Also included is the G80 locking rear differential, a trailer hitch and bumper-mounted four- and seven-pin connectors. 2015 GMC Sierra 1500 WORK TRUCKS 26 FALL 2015 ARBOR AGE www.arborage.com