Bad power train control module/ecm?

when i replaced the air pump and the new GM hose assembly on my 2001 chevy blazer 4.3 automatic a couple of weeks ago, the fault codes P0410 (2ndary air injection malfunction) and P0440 (evap sys. malfunction) CAME back up. the air pump works at cold start up just like its supposed to, so i dont know why that code came back up. for the p0440 code, i replaced the gas cap and the purge solenoid but no luck i guess. (advance auto parts said p0440 was tied in with p0410 so i dont know if that will help anybody) im beginning to realize that the pcm/ecm may be on its way out. (the pcm/ecm commands these systems on) on another topic, the a.b.s. and brake lights illuminated twice at start up and went off twice at start up. the brakes work just fine so i dont know why these lights came on. do all signs point to a failing pcm/ecm? please give me honest answers (dont tell me what the codes mean b/c i know what they mean)