Problems with 2005 GMC Canyon TIRES

I purchased 4 cooper tires 8/18/10. i started noticing a problem in 1/11. the side walls would become very dark black about 2" down from tread .then i noticed the truck not driving right. sensation of being stuck in 4 wheel drive. altough it was not stuck in 4 wheel. i asked many people today i had a mechanic look at them. his response was feel these lumps on the tread. this is where belts have snapped inside the tires all 4 of them!!the side walls are slightly bulged and was told it would only be a matter of time before i will have a blow out. i saved for these tires for 1 yr. cooper atr owl 31x10.50 r15 lt. please help because i can't afford new tires & i'd not want to kill some one on the road.. *tr

I had just bought a used / reposessed 2005 gmc canyon january 18, 2006 with 9100 approx miles on it. may the 3rd 2006 while going on interstate 20/59 in birmingham alabama approx 10:45 am, the driver side rear tire shredded on the interstate while i was driving 75 mph in a 70 zone. there was nothing in the highway struck on a sunny day. however i managed to get the vehicle off the interstate and to a tire repair place where upon inspecting the black rubber tore up the rear bed panel and damage the underneath tire weld area and the super structure. gmc was notified and the representative said someone with knowledge of tires would have to say the tire was defective. at the auto dealer body shop the adjuster person couldn't make a determination with the tire in front of him, he did take pictures, i also went to a tire specialist for the as 60 general tire p225 he said the same thing due to the damage. so i am at a stand still nevertheless this has cost me $500.00 dollars on the deductible for my insurance co. nationwide to pick up the bill. i even told the gmc rep i had a dream after that incident friday night into saturday morning that the front tire shredded and i flipped the car and lost control and crash on the same stretch of interstate. i told him too that if that was to happen and i survive the media would be notified. unless this has happen to you, you don't know the anxiety of driving wondering when this will happen again. after all the vehicle only had been driven approx 3000 miles when the incident happen and has left me with the feeling of wanting to get a foreign truck. this was told to the rep from gmc, the sad part about the whole situation is that as a lt. firefighter paramedic first responder, i have stated what has happen and nothing moved gm it appears, says a lot about us having to testify when it apparently means more evidence is needed for me to believe and help you. *jb

My 2005 canyon has only 258 miles on it and the truck wobbles/shakes at any speed above 45mph. i thought maybe it was just me but there are multiple on the canyonfans.com webs that are having the same problem.*ak