Hello, my BUICK LESABRE 2005 annual time to have tires rotated and brakes checked...so i did this....after they did this the AIRBAG LIGHT was on and wouldn't go off. called back KAL TIRE AND asked why this suddently appeared...no problem before? asked them if they had disconnected the ground to the battery? maybe this would disconnect the computer from being set off when they checked the brakes and rotated the tires?,they said no way ... said it wasn't their fault nothing they did....can I suggest that maybe they bumped the sensor... and set it off and it doesn't take much a wrench dropped on the radiator near the sensor does it?...KAL TIRE told me it is 250 bucks approx to replace the sensor....any helpful suggestions or ideas on this? Teresa

Hello,
If you are unable to fix yourself, than yes you can drive it to local shop. You still have front brakes working.
If you can repair yourself start by removing rear tire than brake drum and look for broken parts. Most likely they will fall out when you remove drum.
Replace worn or broken parts which are inexpensive for your car.
Check for leaking fluid from broken break lines and check fluid level under hood. Keep me informed N I'll help. Paul

It takes a special tool to rotate it clockwise in order for the piston to go back down.

A vibration such as you are talking about could be caused by more then one thing. First it could be caused by a broken belt in one of your tires. I could also be caused by a bent rim, a warped rotter, or a bad cv joint. I hope this helps you solve your problem.

Put whatever air pressure you use, in all your tires,
don't forget to check the pressure in the
spare.

If light stays on ,go to a tire store,
as a wheel valve stem assy, may have failed

TPMS (tire pressure monitor system)

1999 Buick LeSabre Custom Front and Rear Tires P205/70R15
1999 Buick LeSabre Limited Front and Rear Tires P205/70R15
1999 Buick LeSabre PP (*) Front and Rear Tires P215/60R16

(*) PP = Performance Package

Other details can find in the Buick-Lesabre-Owners-Manual

Hope helps (remember rated and comment this).

Check the rubber brake hoses. Many times they internally fail and prevent calipers from releasing.

This means your master cylender is low on brake fluid , top it off with brake fluid and that should solve your problem . You should find out where the brak fluid is going .

go to the passangers front on the side of the dash is a fuse panel it has a red button that says reset turn the key to the run position and hold the reset button in untill the light goes out it may also beep at you while doing this.

If you have the capability to lift your tires using you cars jack try to rotate all tires at a time. make sure you have not engage to any gear anghand barke off and make sureto put a safety block on the opposite tire you are lifting. if you have hard time to rotating your tire wich is lifted and on nuetral positon your brakes are stuck. Have a good mechanic check it for you

The traction control system is controlled through the Anti-lock brake system. The way it works is if one of your wheels starts spinning the ABS applys the brake to that wheel to transfer power to the oppsite wheel that is getting traction. If your ABS is bad then your Traction control won't work. To check it I would find a parking lot on a wet day. In an open space mash in the gas. if you hear the ABS system kick in and you don't squall the tires then your good. My guess is you won't. What I would be worried about is will my ABS work. When checking the traction control is a good time to check the ABS. Acclerate to around 15 mph, then mash the brake as your live depended on it. If you hear a motor run and feel a vibration or grind in the brake peddal, then it works.