2002 chevy trailblazer remote start

I have a customer that wants just a remote start added to there 2002 trailblazer.. but they want to keep there factory keyless entry.  any recomendations on a product and where to find it?  they want to go cheep.

thanks brett g.

It would be more beneficial to the customer ( and to the installer ) if they went and bought an actual RS unit instead of an add-on module. The range is better on an actual RS module & you can still use the OEM remote FOB to control all functions. You will still need to purchase a Passlock II bypass system with an add-on RS unit.

https://www.designtech-intl.com/merchant.ihtml?pid=1&lastcatid=18&step=4

http://www.directed.com/security/valet/val_rs.asp#551t