general problems of the 2004 GMC Canyon

I purchased my GMC Canyon from j koons pontiac GMC in tysons corner, virginia in March 2004. I immediately began having issues with the general brand tires that were purchased with the vehicle. The tire was so weak that things such as dull rocks, nails, and even a toothpick punctures them. I could understand nails, even rocks, but a toothpick? koons did replace one of the four tires after repeated attempts by me to get this issues resolved. However, the tires continued to be a problem where I eventually chose to just replace them. Since then I have had no more issues with my tires except for an occasional nail. Now, recently I had to take my truck in for service due to my blower for my heating and air only working on high. Come to find out this issue was caused by a melted blower. Koons replaced this blower and I left. 1 week later the blower melted again. Only this time it wasn't covered under warranty anymore because the cause was a wire harness gone bad causing the blower to slip and melt from engine heat. How am I responsible for this? I have had numerous issues with my GMC as well on the interior with the cheap plastic used for the seat recliner, the "tool box" clips, the lumbar spine turn knob and more. I have not been impressed at all with the quality of my vehicle and will not purchase another gm vehicle.

Shimmy, vibration, even small potholes jar the steering to either side.

Contact stated the tires wore out. The original front tires were replaced because they wore out from the inside. The replacement tires were also wearing out. The dealer did not offer any explanation for the tire wear. Updated 12/27/05.