GM's current precarious situation didn't come about overnight. There are arguments to be made that various government regulations led to the disaster and that management can't escape much of the blame, and there are plenty who contend it was a series of disastrous union labor contracts that have put the company at risk. But there's one thing everyone agrees on: Over the past few decades GM put some truly terrible products out on the market. Unreliable, uninteresting and flat ugly, these were cars that simply destroyed GM's reputation. It's ironic that right now, just as it teeters near bankrupcy, GM has never had a stronger lineup of cars and trucks. From the shockingly good Chevrolet Cobalt SS, turbocharged and solid Saturn Astra, to the sweet-natured Cadillac CTS and the brilliant Chevrolet Corvette ZR1, the corporation's product portfolio is strong. But each of those cars is weighed down by the legacy of products like the ten listed here. We've arbitrarily limited ourselves to cars built since 1970 here, so don't look for the ill-fated Corvair or truly horrid 1917 Chevrolet Model D on the list.