The "abs" light is on. I have a chip, will the dealer detect that when they fix the abs problem?

 

no, they shouldn't unless they get down and visually inspect your pcm (ie. they are looking to void your warranty, which they probably are not).

The systems are different, the ABS system has it's own module. It does communicate with the PCM, but I don't think you have to worry about it.

good luck, if in doubt, pull it out

later,
chris