SOURCE: Body Control Module - 2000 Chevy Blazer
Not sure about a body control module, there is a pcm under the hood on the pass. side that controls most everything on these, however i would check your fuses for the seat, on the 00 models the headlights do stay on all the time while driving due to daytime running lights but if they stay on after you take the key out then id check the headlight switch or sensor on the pass side dash.
SOURCE: changed body control module on 2002 MonteCarlo
Try cleaning the key and ignition switch with alcohol or electric contact cleaner. Try a different key if you have one. And GM's are known to have problems with the ignition cylinder and theft deterant system. A new ignition cylinder costs $280-$300. Sometimes you can turn the key to the run position wait ten minutes and then start it. Some people say you have to turn the cylinder to the off but not lock position before starting after waiting the ten minutes, but my sister didn't have to with her Malibu.
SOURCE: location of body control module
If you want to know where it is located it is mounted on the drivers side kick panel. It is a box with three harnesses attached to it. If replaced, it must be done by a dealer since the module needs to be programmed for your vehicle. You cannot swap out a module for a used one since the VINs must match.
Good luck and hope this helps.
SOURCE: 02 SS Monte Carlo , dash lights have quit working,
this only occured when the ambient light sensor turned on the headlights when it got to dark. if that is happening then check the headlight switch, the one that also dims the interior lights. mine had a burnt connector and fried the circuit board. replaced it and it works good. check for lose wires and connectors in there as well which likely caused the short.
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Check this site and reprogram by hand see info about reprogram all the lights alarm and radiohttp://mods.firebirdv6.com/stereo.html#F...
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