Development mules are the ugly underbelly of the car development process. Held together with chewing gum and duct tape (often literally) and draped in ugly camouflage diapers, they're meant to be used ...

Just days after we got word that Saab is working on a new crossover with Cadillac, what appears to be a development mule has turned up. The mule carries the bodywork of a Trailblazer from the firewall ...