I purchased an extended warranty from the Warranty Group through CarMax, after a fair amount of pressuring. Shortly before my contract was about to expire, my transmission failed. My mechanic contacted the warranty people, who sent an inspector to look at my vehicle. I keep impeccable servce records, so they had no choice but to honor the claim. Against the advice of the shop, who recommended using GM parts, they sent cheap substandard junk. Lo and behold, the tranny failed again two months later. In the meantime, my agreement had expired... read full review »