As for General Motors, I can't really think of anything worse than being called "General Motors".
GMC = Garage Man's Companion, Got (a) Mechanic Cumming, Garbage Motors Corporation, Genuine Monkey Crap.
Mopar = Many Old Parts Assembled Recklessly, Slowpar.
No, I'm not a big fan of anything Detroit made, but I find GM and Chrysler especially galling. Their entire business model has been to mass produce loads and loads of shoddily-made, unreliable crap with 1920s technology that they sell at huge markups (Hummers anyone?) And when American car buyers got wise to their scam, and when they could no longer afford the gas for their seven litre engines, the companies pleaded for a bailout from the taxpayers. At least Ford got religion about actually producing a quality product that was designed to last more than 100k miles.