[JRTJH]

This is just a comment from a casual observer, but you state your current vehicle (a 2007 Tahoe) has 266K miles on the odometer. That is an average of 26.6K annual miles. Every lease I've seen that is "affordable" is limited to 10K or less per year. You're looking at a 24 month lease with 52K miles. That won't be the "advertised rates" rather likely to be 2.5 to 3 times the advertised rates. At that kind of lease payment, you can buy one cheaper.

If you're considering a lease vs buying, talk to a "GM lease specialist" and get the real price of a 26K per year lease. Then you can make some valid decisions. I'd suspect that you won't find a $199.99 per month for 24 months with $1000 owner loyalty kind of offering. More likely it will range closer to $600 a month with a significant penalty for each mile over 50K.