Intake manifold gasket blew.
Ball joints needed replacing.
Tie rods needed replaced.
Alternator and water pump were replaced.
Wheel bearing needed replaced.
Universal joint needed replaced.
Fuel pump was replaced.
Air intake temperature sensor was replaced.
All new plugs, wires, and cap and rotor were needed.
Constant "Check Engine" lights.
Faulty O2 sensors.
Oil pump went, which was the end of the Blazer.
Although the previous owner failed to properly take care of this S10 Blazer, many of the problems I faced were common problems, that all S-10's have. After a few $500+ trips to the garage I learned how to replace the parts myself. The wheel bearing was going to cost over $300, I was able to buy and install it for under $150. The Blazer had problems starting on cold mornings, after breaking the ice of the door of my Subaru, the Subaru started right up. Once it completely failed to start and the garage charged me over $300 to replace the plugs, wire, cap, and rotor, which I had already replaced when I got it, in order to improve the performance. The gas mileage was around 15mpg on a good day. The parts were cheap to buy from the local auto parts store, so if you are able to do the work yourself, I would recommend it. The two door style was nice, but it was hard for some people to get into the back seat, and the head room was not great in the back seat. The engine was strong and the 4 wheel drive was a nice feature to have. In conclusion the S-10 Blazer is a good truck for maybe a teenager, who is able to do the work himself, and does not need a reliable vehicle.