service vehicle soon usually comes on for body control/abs faults or low level codes
Service engine soon is usually on for engine/transmission codes
Funny how many unrelated things can cause wheel speed codes. I chased wheel speed codes for a month on my vette only to find out it was the stainless steel braided brake hoses!I have found some cars do all that when the alt is low on voltage. Not quite enough to trigger the battery/alt light. Can't hurt to check the charging system.
Hard to say, some do some dont.
Id like to see a pic of the regal with CTS wheels. Cant decide which wheels i want to go with.Im leaning torwards lucerne wheels for now.
ABS and TRAC lights are probably meaning you got a bad wheel bearing/hub assembly...or the sensor just went bad in one of them...but you have to buy the entire assembly.
I recently replaced the struts on my car, didn't get the right rear ABS sensor plugged in all the way and it threw the same codes once it wiggled out. Have you done any work to your car lately?