What to fix on 2004 Olds Alero brake sensor code, traction is off, ABS off

SOURCE: 2001 olds ABS and traction control sensor issue

An ABS sensor DOES affect the traction control system. Traction control uses these sensors to determine if a wheel is losing traction. A bad sensor will cause both the ABS and TRACTION lights to come on.
The CHECK ENGINE light however is going to be a seperate problem.

SOURCE: Tail/brake light bulb replacement 2004 Olds Alero

In the trunk, in the rear corners, you'll see some plastic "caps" with tabs on them, similar to wing nuts. Remove those, and the taillight comes right off the back of the car. That will allow you to replace the bulbs.

SOURCE: anti-lock, traction control, service soon,brake,

Anti-Lock and Trac Off lights are lit on my 1999 Alero, as well. They usually come on after about 5 minutes of driving, but are not always on when I start the car.

SOURCE: abs , brake, traction control light on in 04 lesabre

check to make sure that all the the bulbs in the rear are working,even the third light

SOURCE: brake light abs light traction control light all

you'll have to have it diagnosed at a repair shop to pinpoint the source. sorry, but thats how they make them. you could buy your own but it'll cost about 200$