27. GMC Motorhome
You may not have expected this vehicle to be on the list of best GM models. However, it had to be as since it was so revolutionary, it deserves a closer look. They presented the GMC Motorhome in 1973 and discontinued it in 1978 after building over 12,000, which was a huge success. The idea behind this RV was to offer the best possible vehicle money could buy with a host of innovative design and engineering solutions by GM designers.
The Motorhome featured several innovations, including a special chassis frame, aluminum body, interior trimmings, and an aerodynamic design. It had a front-wheel drivetrain GMC borrowed from the Oldsmobile Toronado along with its powerful 455 V8 engine. The result was a modern, luxurious, and spacious motorhome that drove like a regular full-size sedan. It’s unclear why GM discontinued this model in the late 1970s. They could have easily sold it well into the 1980s to keep GM in the RV market.