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This was a challenge. Yes, I was able to get a remote start installed on an 02 Yukon XL2500, which is essentially the same as the Suburban.
THis is a PassLock II system. There is a resistor inside the ignition switch that is sensed by the security system when the key is turned to the "Start" position. Each vehicle has a unique resistance value. You will need to measure this resistance with a digital meter and bypass Passlock when the remote start is active.
There are several bypass systems available which you can use to dial in the appropriate resistance. My local Pep Boys had an audiovox unit that had a series of DIP switches to select the resistance. BUT, make sure that you measure the resistance of the bypass unit with your meter. The switch chart provided with this unit was not accurate.
You will need to cut the yellow PassLock wire ... be sure of what you are doing ... there's no excess wire to patch things up. Also, the remote start components should not be easily accessible, since it does bypass Passlock. I removed the steering shaft trim, dash faceplate and gauge cluster so that I could run all of these "boxes" high into the dashboard near the defroster vent. I wrapped all wiring and routed in the steel channels that reinforce the dashboard. Also, given the amount of current flowing through these connections, I chose to solder all connections.
All told, it took me the better part of a day to do this job. But .. it's great on a hot day to get into a cool truck. I'm sure that it will be equally enjoyable this winter .. and it gets a double take by old and young alike when an unmanned truck just starts as they walk by. ;-)
Good luck!
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