Reported from autoblog its 2011 Worst Cars on the Road list, and the outcome is not pretty for American manufacturers. With the exception of the 2011 Mercedes-Benz S-Class, the 2011 Smart ForTwo and the 2011 Nissan Titan, the cars on the list are all American-made. Worse than that, they all come from two manufacturers: General Motors and Chrysler. Ford managed to avoid the list completely.

To determine which cars get the dubious honor and which don’t, Forbes compiles results from six studies by Consumer Reports including the Most Reliable Cars Report, Best and Worst Safety Performance Survey, Best and Worst Fuel Economy, Highest Cost of Ownership, the Best and Worst Values Report and Consumer Reports’ overall scores for new cars.

Chrysler made the list with the 2010 Chrysler Town & Country, which racked up dismal scores for reliability and cost of ownership. Both the 2011 Jeep Wrangler and the Jeep Liberty made the cut, with the Liberty scoring poorly for reliability and fuel economy. The Wrangler joined the Liberty in the reliability department, and also ranked for worst value, and made a spot on Consumer Reports’ Worst Cars list. The 2011 Dodge Nitro and Dodge Dakota made the list for similar reasons.

The picture is almost as bleak at GM, where offerings from Chevrolet and Cadillac crowded the picture. The base model 2011 Cadillac Escalade earned spots on the Worst Value, Highest Cost of Ownership and Worst Safety Performance lists. The 2011 Chevrolet Tahoe Hybrid hung with the Cadillac for Worst Value and safety, and earned a spot on the Least Reliable roster as well. The Chevrolet Aveo and Chevrolet Colorado rounded out the worst General Motors offerings for 2011.

2011 Forbes Worst Cars on the Road

1. 2011 Cadillac Escalade
2. 2011 Chevrolet Tahoe Hybrid
3. 2011 Chevrolet Colorado
4. 2011 Chevrolet Aveo
5. 2010 Chrysler Town and Country
6. 2011 Dodge Dakota
7. 2011 Dodge Nitro
8. 2011 Jeep Liberty