I recently bought a 4806V viper auto start and am having it installed tomorrow. I have read some mixed thoughts on the affects of installing the auto start has with a tuned truck. Is there anything that i should do prior to installation? Should i take the tunes off of the truck? Will there be any communication problems between the viper and my tunes? If it means anything i switch tunes with and edge CS. Any help is greatly appreciated.
im not sure if your the same person who PM'ed me on duramaxforums but ill answer this too just to be safe.
old body trucks do NOT have chipped keys, but they do have an immobilizer in the ignition cylinder that uses a 2 wire resistor and reference system (passlock 2) to validate the cylinder is being turned and its not just being "hot wired" or what not. the remote start has a couple different ways around this. there is a 2 relay bypass that uses a resistor to defeat the immobilizer and as far as the truck is concerned there is someone in the seat turning the key. this method will NEVER cause conflicts or data collisions as long as its installed properly. you CANNOT use a single relay passlock 2 bypass on a silverado you MUST use a 2 relay bypass or you will get a security light during take over. you can also use a module like a FLCAN, DBALL (dont use a DBALL) ALCA, fortin ect, that will present the vehicle with pass lock information through the data bus at the OBDII, this is where people can some times run into issues, if the module is talking on the bus, then a scanner plugged into the OBDII cannot. This issue however is not present on the NBS and NNBS trucks because the remote start does not integrate into the OBDII port.
so long story short, you will likely be fine. i would pull the remote start fuses if your going to flash a tune, if you have an OBS truck, then the relay method is bullet proof, but i have rarely seen issues with an FLCAN or ALCA module as they allow scanner passthrough which lets the module deactivate when it detects a scanner plugged in.
