So I just seen the thread where someone did the pre cut stuff to match his rear tint on his truck. I'd like to try it myself and save some money. Any idea what darkness the rear windows and back glass are in a 98 Navi?

 

the privacy glass is about 25% probably close to 30 due to sun fade. Are you trying match your front?
I recomend 25 on driver and pass. 25 over the privacy on back doors and 5 in cargo area. I did that on my 03 Nav I think it looks very nice