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John Goreham Contributing Writer, GM-Trucks.com 4-11-2019 GMC's new Sierra CarbonPro Editions arrive at dealers this summer, available on the Sierra Denali 1500 and the Sierra AT4 1500. GMC says that the first will arrive in June. Unlike a composite bedliner, GMC's purpose-built CarbonPro bed is the first of its kind for carbon fiber composite. GMC promises best-in-class dent, scratch and corrosion resistance. To help prove that statement, GMC has released a little bit of data on its testing. More importantly, images and video. Tim Herrick, executive chief engineer, Full-Size Trucks, General Motors explained why truck buyers will want CrbonPro, saying, “The bed is the working end of a truck; it’s what brings buyers to the segment. Loaded with motorcycles, snowmobiles or dirt bikes, CarbonPro in the 2019 GMC Sierra is sure to impress with its strength, space and innovation.” Duncan Aldred, vice president, Global GMC, added, “CarbonPro is made of the same raw material found in seven-figure supercars and even aerospace applications. Coupled with offering the world’s first six-function MultiPro tailgate, the 2019 Sierra packs a one-two hauling punch for whatever the situation demands.” The GMC CarbonPro bed has best-in-class cargo volume partly because its sidewalls can be pushed out farther. This is due to the outstanding formability of the carbon fiber composite GMC chose that allows molding deep and complex shapes with variable wall thicknesses. The CarbonPro bed is large enough to slide a 2-inch by 6-inch wooden divider into pockets in the bed wall for cargo organization and separation. GMC also points out that it is possible to vary the graining of the material. Some areas are deeply grained or traction and some are less grained so that cargo can slide in and out better. The GMC CarbonPro bed has many design features, including: - Spray-in bedliner not needed: Because carbon fiber composite is exceptionally durable, a spray-in bedliner is not necessary to help prevent damage and therefore will not be packaged on models with the CarbonPro bed. The composite material is rugged yet nonabrasive. - Rear wheelhouse liners not needed: Because of CarbonPro’s increased dent resistance versus aluminum or steel, no wheelhouse liner is installed from the factory. - Payload increase: Models equipped with the CarbonPro bed offer an increase in payload over a steel bed due to the mass savings of carbon fiber composite. Payload for these models is at least 59 pounds higher, depending on the configurations and equipment. GMC laid out the type of testing that it conducts. Included are: -Drop tests: Large and heavy loads were repeatedly dropped on the CarbonPro bed to replicate extreme use scenarios. Testing included dropping cinder blocks, 1800-pound loads of gravel and 450-pound water-filled steel drums from varying heights. -Corrosion test: CarbonPro was subjected to corrosion testing but carbon fiber composite is naturally resistant to corrosion. -Snowmobile test: A snowmobile with metal studs on the track was driven into the bed and accelerated at full throttle with a 250-pound rider on board with only minimal scratching evident on the bed. -Extreme temperature testing: Validation work was performed in Yuma, Arizona, and Kapuskasing, Ontario, to help ensure CarbonPro holds up in unforgiving environments. -Generator test: High heat exposure involved aiming the exhaust from a portable generator directly at the corner of the bed to ensure heat and vibration would not degrade the bed. Who is interested in this new cargo bed? What do you like about it?