GMC is working on a new body-on-frame SUV that will revive the Jimmy name, according to a report from GM Authority.The off-road-ready SUV would be based on the GMC Canyon and would battle the Toyota 4Runner, Ford Bronco, and Jeep Wrangler.While a turbocharged 2.7-liter four-cylinder would likely be the standard engine, the report says GMC is considering offering a V-8 as well.