I'm of a mind that in a normal car market, sell when the car's >100k miles and you're looking at repairs $2k or >. This stupid market makes the decision much more difficult. We're coming up on the holiday season and end of year, if dealers have any new inventory in December you may be able to wrangle a deal. I say wait, drive the Chevy as little as possible and try your luck new in 2 months.
You'd probably think I'm nuts.
I just put $1200 into a '96 Honda that was technically totaled over a decade ago.
I've got an '01 Toyota with over 300K miles that I've just put $1800 into and still don't know what's wrong with it (towed it to 4 shops over the past 18 months that are all shuked). Still planning to shell out more . Now this one, I'm admittedly a little stupid about, but I know that and don't care. I've had that car for 21 years and have a stupid emotional attachment. Also, for the 1st 300K miles, it never had a single repair other than routine maintenance stuff. So, now that it needs it, I'm fine with it. If we can get over this one hump, I'm sure this car has another 200K miles in it.
Generally speaking, if I believe in a car, I'm fixing it. Then again, I'm 43 and I've never sold a car (only given away or sent to junkyard).
I certainly agree about the car market and waiting. A lot of people are saying things could be much calmer next Spring.