it will only void your warranty if it can be proven that the mod was the direct cause of a failure or issue. They won't know that it'* aftermarket though seeming you keep the same PCM. if there'* PCM issues they'd just reflash it.. I don't think they'd even know?

So what you hook this up to PCM? And the dealer wouldn't know? But if its a different PCM couldn't they tell?

They don't have the it for a 2005 SLE, that stinks...