I have a 2003 Trailblazer EXT (L6) and I've been having problems with my IGN 0 fuse blowing causing the ignition to lock the key and the automatic transmission will not switch gears (3rd gear only). When I replace the fuse, everything works fine. I've had to do this about 5 times now. This time, the auto trans was fine, but the key still will not come out. Also, I had a 15 amp fuse in there that blew rather than the 10 amp it's supposed to have (I was in a pinch and didn't have a 10 amp on me)

Could there be another fuse I need to check that would only affect the ignition or did I cook something. I double checked the ING 0 fuse is not blown. There must be power going through it because the transmission is behaving correctly.

Thanks for any help