I have a 2001 chevy blazer, It has a vortec 4.3 liter with engine with 100,210 miles i am having two problems. first problem i am having is the trans shifts rough. fluid levels are fine and dosent smell burnt. it has trouble shifting into second gear and strugles to go into passing gear. The 2 it that the ac compressor will not kick on freon levels are fine and the compressor turns freely. it worked fine for a coupal minutes today. i turned the car off went inside and when i came back out to start it the compresser would not come on. i checked all the fuses and they are all fine thanks ~Joel~