04 Sierra Prostart & GM-SL

the GM-SL will basically give you everything from doorlocks, to doorpin, to park lights and so on,

basically you will hook up the doorlock wires from the prostart to the bypass, you will hook up positive parklights from your prostart to the bypass and so on

the ground out when running wire from your remote starter will go to the bypass, the data wire from the bypass will go to the purple wire at the diagnostics connector under the driver side of dash

just follow the directions and I am sure you will be all right

the ign cylinder generates an R code during a specific time window during crank.... if the BCM doesnt see this R code within it's specified time window it shuts down the fuel system....

it is a different system/technology than a transponder system like PK III .....

the bypass module learns the correct code and then generates and sends this code to the BCM during R/S......