Service air bag light is on 2000 cadillac deville dhs. what are the possible reasons.

bad wheel speed sensor

SHOCKS LEAKING LOOK AT RUBBER BOOTS. SPRAY WITH SOAPY WATER YOU'LL SEE LEAKS

there is a problem with the system and it shut down. hate to say it but you should have a professional repair it. You need to pull the trouble code from the restraint control module to find the affected circuit. I don't recommend trying to fix yourself because touch the wrong thing and you could deploy the bags then you'll need over a thousand dollars to fix. If your in a accident now you won't have deployment of the air bags to help you.

2000 was the year they changed the body style. If memory serves me correct no they do not. WebRepcurrentVotenoRatingnoWeight

may be you should make a diagnostic and you can do it in a garage or you can do it by yourself if you want to do it by yourself you need some tools and you can find some good ones here: spobd2.com

Check the charging system battery is 12.5 at no load at running it should be at 13volts to 14volts. you charging output can be low

take it to a qualified technician and get it serviced, NEVER attemp any airbag repairs yourself , there is a lot of energy stored in an air bag and can be deadly if accidently set off !!!

It is on top of engine right where the air ducting attaches to

Probably the best thing is a Glass shop. It sounds like a part called a window regulator is broke. Hopefully the cracking sound is just the plastic of the regulator and not electricity arcing.
In trying to do this yourself, the window has to be up and braced. Your Cadillac is a big car with big windows. Parts are a little heavier and harder to control.
You can call around for the price, tell them you "WANT TO KNOW THE COST OF REPLACING A WINDOW REGULATOR FOR YOUR CADILLAC DHS."

Have you checked the fuses?