Hi, I have a regal GS , 97, 67000 mi. The speedometer is moving back
and forth, the abs light is on, brake light,service engine soon, trac.
control off, light; any ideas? Thanks PF

Forgot, also clunking sound from underneath, and clicking, sporatically. Thanks.PF

i am not certain, but if that car uses an output speed sensor to monitor speed and such, many of those issues could be caused with the OSS going bad.