That's just it, I have an extended warranty.
Question-"set so it is on when the cruise is on", meaning the CC button is pressed and light is on....
Would the dealership not get wise to that eventually....?....
Nope. The light will indicate to you that the tune is on. When you take it to the dealer, you turn it off and no one there is likely to turn it on again.
If you have it the other way, with tune on = Cruise off, they will be seeing the car with the tune operational. If you then turn the cruise on (=tune off) they may notice and will possibly turn the cruise off again - and there you go again, with them looking at the car with the tune actuated.
1957 Jamaican MGA
1958 MGA Twincam
1962 MGA Coupe
1971 Jensen Interceptor
2007 BMW Z4M coupe
2009 Pontiac Solstice GXP Coupe
1965 Jensen CV8
1969 MGC roadster,
1969 Lamborghini Islero S
1988 Pontiac Fiero GT
Bill in BC