Engine Exhaust System problems of the 2008 GMC Acadia

There is a recall on the convertrr post that causes the engine to seize up and pull to go into the engine. . When started nothing comes out of the exhaust pipes as they are clogged making it dangerous to operate. . The recall ignoramus this year, make and model for the same problem however after contacting GMC repeatedly they say that it doesn't include this exact VIN. . I have already had the engine replaced once due to this problem and ther dealer failed to diagnose it properly and acknowledge that it had the same problem as the recall in other vehicles ofthe same make and model. . . The vehicle sizes up at any rate of speed and the exhaust is clogged making the vehicle dangerous to operate.

The car's air condition pump, filters, and hoses they had major contaminants.

Exhaust fumes entering vehicle. When vehicle is running and at a stop, exhaust fumes enter the passenger compartment. All windows are in the up position, and all doors are properly closed during the event. Results in nausea and headache. Occurs every time vehicle is driven. Dealer has not resolved the problem.

Exhaust fumes entering vehicle. When vehicle is running and at a stop, exhaust fumes enter the passenger compartment. All windows are in the up position, and all doors are properly closed during the event. Results in nausea and headache. Occurs every time vehicle is driven. Dealer has not resolved the problem.

GMC Acadia was bought in January 2008. Has been back 4 times for propane smell that comes into the car from through the vents. It mostly happens when I stop for a red light. The fumes seem to back up into the car. Catalytic converter and exhaust system was switch out but it continues to happen even after 7000 miles. Have called gm corp as well as dealer to complain that the smell is making me sick. Doctor notes have been sent to dealer and corp but still not resolved. I drive with my windows open even if it 20 degrees.