When it was released, the Avalanche stood out as a unique fusion between a pickup truck and an SUV, sharing its GMT800 underpinnings with a variety of full-size GM vehicles, including the Chevy ...

For 2007, the Sierra 1500HD resided as part of the GMC brand’s Classic line of trucks based on the outgoing GMT800 platform. Featuring a heavy-duty suspension mounted to a durable hydroformed chassis, ...