BassGas,
Hello. I installed the following on my 2001 Yukon XL a few years ago and am very happy the setup. In fact, I think it saved $70k and helped me retain a 2500 towing vehicle<g>. Good luck!
($850) Voyager backup Camera and Monitor: (Rear backup camera with a 7 inch monitor: input for 3 cameras and navigation system)
($460) Kenwood DDX372BT Radio (Interface for iPod, Tuner, Telephone, USB, CD, Pandora, Bluetooth,
SiriusXM, new dash bezel and arching camera mount similar to class A motorhomes. The mic works great with the nicely insulated and quiet cabin area of the Yukon. Friend don't realize I am in a truck while on the phone.
On a side note...(off topic)
The camera enabled discrete stealthy car-camping in high end hotel parking lots since I was able to convert the cargo area into a van-like cabin area. (I installed very dark window tint, sun reflectors and nice curtains on the interior.) Every night I can avoid the expense of a hotel is more money in the tank... and another mile down the road. The intangible benefit is the freedom to drive past hotels and campsites and to continue touring until I wish to call it a day. Also, it is great for those with children and elderly guests who wish to nap while on a long tour. I have wrap-around curtains between the first and second row of seats. No sunlight gets in and no aux lights gets out.