'99 blazer auto headlight question

hi all,

i have a 99 blazer 4dr 4x4 with the lovely (PITA) auto headlights. i used to have a 2000 blazer that had the auto headlights as well and there was a way to disable them by pressing the dome override button a few times and they would turn off, but i found out that isnt possible with my '99 because the ability to turn them off wasn't added till 2000.

so what i am wondering is if i upgrade my truck's BCM to that of a 2000-up blazer would that make it possible to add that ability to turn the lights off? do i need to upgrade the headlight switch as well, or just the BCM and is it actually possible or is there anything that would not be compatible? I appreciate the help, thanks in advance.

This should tell you everything you need to know about headlights:

http://www.s-10crewcab.com/phpBB2/viewtopic.php?t=4649

I can only personally vouch for the quadbeam mod though.

thats a nice source of information, thanks! i really want to keep everything stock, though, so I really only want to know if i replace the BCM will it work.

OR can i take it to the dealer and ask them to flash the new code into the BCM, would they do that?