my 2004 trailblazer will not start.
i did some brake work on my trailblazer and then it wouldnt start at all. i replaced the brake booster, master cyclinder, and ABS module and pump and when i went to turn my truck on it powered everything on but would not crank. i have replaced the relay, the ignition switch, and ignition cyclinder and still nothing. i am able to arc the strarter or jump the relay and it will fire for a couple seconds then it dies and wont fire again until i turn the key off and back on then it will fire again for a sec. all my fuses are good and my security light isnt on the only lights on are check engine light and abs light and those are always on. it throws like 40 codes off when i hook up my scanner also. please help