Just thought I'd share my experience with adding the 2-way remote to my 07 tahoe. I already had remote start w/o power liftgate so the unit listed for $150.00 and I paid $130.00 for the kit. I needed some warranty work done, so before I went in I installed the kit myself (super easy, just remove driver's side D-pillar trim where speaker is, replace RCDL module, stick antenna on window and plug it in.) When I dropped it off I told the service writer what I had and ask if he could "help me out." When I picked the truck up I had a working 2-way remote start for no charge. Since I was already getting work done, he just wrote it up that the keyless wasn't working and they just reprogrammed the RCDL module.