What ever actually makes the ABS kick on (applies, releases the brakes quickly) has been acting up the last few days... I've felt and heard that vibration that you would normally feel when the abs kicks in without even applying the brakes, actually keeping my foot on the throttle...

Anyhow have any idea where to start with this? could it be a bad speed sensors? should i be concerned that my abs are going to totally go on me?

 

Yes, most likely a hub speed sensor is dirty or going.

 

is there a somewhat "easy" way to isolate which ever one it might be?

 

just called GM, they can figure it out rather quickly, so i'll just drop it off on Monday

Thanks Chibi!

 

ABS light will throw an ABS code (not readable with a standard OBDII scanner) and that should let you know which assembly it is.