2006 equinox, remote starter

What type R/S unit are you using?

Your car has the PassLock II immobilizer on it.  What bypass are you using?

The car does not use a Start wire from the R/S unit.  Instead the engine starts cranking after it sees IGN and ACC go positive 12v and then ACC drops to 0 v.  This timing is critical and some R/S units don't bring up IGN and ACC exactly together. 

Did you use a Passlock bypass module?  I am pretty sure you have the PassLock II immobilizer. 

Check the ignition cylinder for a group of 3 wires.  They are usually White or RED / White, Yellow, and Black or ORANGE / Black. 

Your ProStart will directly interface any of the major 3 manufacturers, DEI, Fortin or ADS iDatalink.  The bypass is required to make the car think there is a key in the ignition during R/S.  My preferrence would be the ADS TBSL-PL module.

Here is another site for wiring info:   http://www.bulldogsecurity.com/bdnew/vehiclewiringdiagrams.asp

+12 volt constant         2 RED / White wires               at ignition switch / steering column

IGN1                              Pink                                          at ignition switch

ACC1                             Orange                                    at ignition switch

ACC2                            Brown                                       at ignition switch

Keysense                    Light Green                              at BCM - Gray 24 pin plug   or  at ignition switch  ( must use )

Passlock wires       can also be found at BCM in 16 pin Gray Plug ( plug on left side, closest to steering wheel )  Yellow and ORANGE / Black.

If you use GRW to control both the bypass and Keysense, diode isolate each connection.

BCM is below radio, remove bezel.

You could be in short or long tamper mode.  Go to the DEI web site:   http://www.bypasskit.com/product.aspx?productid=41   and download the 556L install manual.  Page 6 explains PassLock II troubleshooting.