Codes P0740, P1521, P0750, P0700
A check engine light came on and when I took it to the repair shop, I was told the codes listed above came up. The day after the light came on, it wouldn't shift into high gear. The tranny fluid was changed 12K miles ago and is currently full, no leaks. Also, it shut off once a couple of weeks prior to this while I was driving; I stopped, put it into park and restarted it-it started right up-haven't had that problem since. Is there anything I can do to try and fix the problem before letting the shop have a go at it? Also, is there some place I can go to see what trim my truck has using the VIN?