Best bypass module company?

No Better than DEI. 555l is the best piece for chevys.

alright, looks like whell be getting DEI bypass's, thanks everyone.

Take a look at bypasskit.com. There you can see what modules you need for each vehicle. The PLDATA is the best for Passlock II, but for Passkey III you will need different modules depending on which GM car you have. They also have all of the databus interface modules which most GM vehicles require for doorlocks and disarming etc. I have seen a few problems posted on this site with DEI bypasses, so I wouldnt say that there is none better than DEI. Since it sounds like you will be buying multiple quantities, you should check out Byapasskit.com. Call them and tell them the quantities you are looking at getting and you can get them for really cheap if you buy in bulk. J Rilla

Owner/Installer