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GM describes the new SAE J2807 test like this: --------------------- Performance standards for trailering vehicles: To help ensure that vehicles can confidently tow the rated maximum trailer weight under a variety of real-world driving conditions, SAE J2807 establishes specific test protocols. These include: Cooling capability on a long highway upgrade modeled on the Davis Dam grade on Arizona SR 68; Launch and acceleration performance on a level road and a 12 percent upgrade; Combined handling performance – understeer and trailer sway; Combined braking performance – stopping distance and parking brake-hold on grade; and Structural performance for the vehicle and hitch or hitch receiver. New calculations for trailer weight ratings: In addition to the performance standards, SAE J2807 also uses a specific set of assumptions to calculate maximum trailer weight ratings: For light-duty full-size pickups (GVWR < 8,500 lbs.), SAE J2807 assumes that the tow vehicle includes any options with higher than 33 percent penetration; It assumes there is both a driver and passenger in the vehicle, each weighing 150 pounds; It assumes that tow vehicles also include up to 70 pounds of aftermarket hitch equipment (where applicable); and For conventional trailer towing, SAE J2807 assumes that 10 percent of the trailer weight is on the tongue. --------------------- Here's how some of the most popular Silverado/Sierra 1500 configurations compare with last year: Configuration 2014 Rating / 2015 J2807 Rating Regular cab 2WD 4.3L V-6 6.5’ box 3.43 axle 6,400 lbs. / 6,100 lbs. Double cab 2WD 5.3L V-8 6.5’ box 3.08 axle 6,900 lbs. / 6,500 lbs. Crew cab 2WD 5.3L V-8 5.7’ box 3.42 axle 9,800 lbs. / 9,400 lbs. Regular cab 4x4 4.3L V-6 6.5’ box 3.42 axle 7,600 lbs. / 7,600 lbs. Double cab 4x4 5.3L V-8 6.5’ box 3.42 axle 9,600 lbs. / 9,200 lbs. Crew cab 4x4 5.3L V-8 5.7’ box 3.73 axle 11,200 lbs. / 10,800 lbs. -
By Zane Merva Executive Editor, GM-Trucks.com 6/19/2014 General Motors has announced that starting with the 2015 model year it will report towing capacity determined using SAE J2807 recommended testing practices. The more rigorous testing procedure has been held at arms length by the big three for years. Pickup producers have long overstated the capacity of their trucks using internal test procedures. The new J2807 standard brings everyone up to the same playing field. This means every pickup is finally being rated for towing capacity in the exact same manner from the 2015 model year forward. That's great news for consumers but the much more rigorous test lowers the "official" capacity numbers that many automakers love to throw around in ads.The Silverado and Sierra 1500 will see their towing capacity adjusted slightly down for the 2015 model year due to the new testing requirements. Only one Silverado and Sierra configuration, a 2-wheel-drive double cab with the optional 6.2L engine and the Max-Trailering package, will retain the prior year's rating of 12,000lbs. GM describes the new SAE J2807 test like this: --------------------- Performance standards for trailering vehicles: To help ensure that vehicles can confidently tow the rated maximum trailer weight under a variety of real-world driving conditions, SAE J2807 establishes specific test protocols. These include: Cooling capability on a long highway upgrade modeled on the Davis Dam grade on Arizona SR 68; Launch and acceleration performance on a level road and a 12 percent upgrade; Combined handling performance – understeer and trailer sway; Combined braking performance – stopping distance and parking brake-hold on grade; and Structural performance for the vehicle and hitch or hitch receiver. New calculations for trailer weight ratings: In addition to the performance standards, SAE J2807 also uses a specific set of assumptions to calculate maximum trailer weight ratings: For light-duty full-size pickups (GVWR < 8,500 lbs.), SAE J2807 assumes that the tow vehicle includes any options with higher than 33 percent penetration; It assumes there is both a driver and passenger in the vehicle, each weighing 150 pounds; It assumes that tow vehicles also include up to 70 pounds of aftermarket hitch equipment (where applicable); and For conventional trailer towing, SAE J2807 assumes that 10 percent of the trailer weight is on the tongue. --------------------- Here's how some of the most popular Silverado/Sierra 1500 configurations compare with last year: Configuration 2014 Rating / 2015 J2807 Rating Regular cab 2WD 4.3L V-6 6.5’ box 3.43 axle 6,400 lbs. / 6,100 lbs. Double cab 2WD 5.3L V-8 6.5’ box 3.08 axle 6,900 lbs. / 6,500 lbs. Crew cab 2WD 5.3L V-8 5.7’ box 3.42 axle 9,800 lbs. / 9,400 lbs. Regular cab 4x4 4.3L V-6 6.5’ box 3.42 axle 7,600 lbs. / 7,600 lbs. Double cab 4x4 5.3L V-8 6.5’ box 3.42 axle 9,600 lbs. / 9,200 lbs. Crew cab 4x4 5.3L V-8 5.7’ box 3.73 axle 11,200 lbs. / 10,800 lbs. Attached Images: Click here to view the article
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By Zane Merva Executive Editor, GM-Trucks.com 6/18/2014 General Motors has released the final engine power figures for the up coming 2015 Chevrolet Colorado and GMC Canyon. The standard 2.5L four-cylinder engine will produce 200-horsepower and 191 ft-lb of torque while the optional 3.6L six-cylinder engine will be rated at 305-horsepower and 269 ft-lb. Properly equipped, the mid-size truck duo will be rated to tow up to 7,000lbs when it goes on sale later this year. No further information on the optional 2016 2.8L Duramax diesel engine was released at this time. Chevrolet/GMC Press Release Chevrolet Colorado and GMC Canyon Top Segment in Power DETROIT – The 2015 Chevrolet Colorado and GMC Canyon will have the most horsepower in the midsized truck segment when they go on sale this fall. The Colorado and Canyon’s available engines provide customers choices to fit their varied lifestyles. The 2.5L I-4 has been rated at 200 horsepower and 191 lb-ft of torque, while the 3.6L V-6 is rated at 305 horsepower and 269 lb-ft of torque. The Colorado and Canyon will also provide class-leading maximum trailering capabilities, with the capacity to tow up to 7,000 pounds when properly equipped. That’s more than enough to take a truck full of friends, gear in the bed, and a trailer full of toys to your favorite weekend adventure. Each engine features direct injection and variable valve timing to make the most of power and efficiency. Both engines are based on proven engine designs found throughout the General Motors’ family, but are optimized for the demands of truck use with the latest technology for improving performance and efficiency. This includes torque at lower RPMs for better towing power and a more confident feeling while pulling a trailer. Both engines are matched to a six-speed automatic transmission; a six-speed manual is available on select extended cab 2WD models. The six-speed automatic is tuned specifically for the truck engines, offering features like auto grade braking and tow/haul mode. “Every decision we made considered the wants and needs of midsize truck customers. The 2015 Chevrolet Colorado and GMC Canyon are engineered to deliver class leading horsepower,” said Anita Burke, vehicle chief engineer for Midsize Trucks. “Not everyone needs the size or the capability of a full-sized pickup. Now customers have a viable option in a smaller package.” Class-leading horsepower also comes with efficiency, courtesy of dual-overhead camshafts with variable valve timing, direct injection, and jet-spray piston cooling, while aluminum blocks and forged-steel crankshafts ensure a long-life cycle. The Colorado and Canyon will be assembled at GM’s Wentzville, Mo., assembly plant with start of production in fall 2014. Attached Images: Click here to view the article
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Chevrolet/GMC Press Release Chevrolet Colorado and GMC Canyon Top Segment in Power DETROIT – The 2015 Chevrolet Colorado and GMC Canyon will have the most horsepower in the midsized truck segment when they go on sale this fall. The Colorado and Canyon’s available engines provide customers choices to fit their varied lifestyles. The 2.5L I-4 has been rated at 200 horsepower and 191 lb-ft of torque, while the 3.6L V-6 is rated at 305 horsepower and 269 lb-ft of torque. The Colorado and Canyon will also provide class-leading maximum trailering capabilities, with the capacity to tow up to 7,000 pounds when properly equipped. That’s more than enough to take a truck full of friends, gear in the bed, and a trailer full of toys to your favorite weekend adventure. Each engine features direct injection and variable valve timing to make the most of power and efficiency. Both engines are based on proven engine designs found throughout the General Motors’ family, but are optimized for the demands of truck use with the latest technology for improving performance and efficiency. This includes torque at lower RPMs for better towing power and a more confident feeling while pulling a trailer. Both engines are matched to a six-speed automatic transmission; a six-speed manual is available on select extended cab 2WD models. The six-speed automatic is tuned specifically for the truck engines, offering features like auto grade braking and tow/haul mode. “Every decision we made considered the wants and needs of midsize truck customers. The 2015 Chevrolet Colorado and GMC Canyon are engineered to deliver class leading horsepower,” said Anita Burke, vehicle chief engineer for Midsize Trucks. “Not everyone needs the size or the capability of a full-sized pickup. Now customers have a viable option in a smaller package.” Class-leading horsepower also comes with efficiency, courtesy of dual-overhead camshafts with variable valve timing, direct injection, and jet-spray piston cooling, while aluminum blocks and forged-steel crankshafts ensure a long-life cycle. The Colorado and Canyon will be assembled at GM’s Wentzville, Mo., assembly plant with start of production in fall 2014.
