I purchased my Blazer used with only 8,500 miles on it. I had no problems at all until 32K. Alternator, battery, wiper motor, Dex-Cool sludge, engine oil cooler lines started leaking. I did all the repairs except I left the oil lines for the dealer. I really had no other problems until 72K. Oil cooler line leaking again, transmission slipping, brake caliper, 4WD semi engaging on its own, high speed vibration, heater core "crappy Dex-Cool". Spent $2300 and the dealer still can't fix the 4WD problem. I have taken very good care of this car,doing tune ups and fluid changes every year. I know I hate this car.