Power steering line blew off in driveway at 49K miles.
48K miles - Transmission lines leaked, causing low fluid and burnt clutches in tranny. Repaired but still slips.
38K miles - Water pump had to be replaced after twice losing so much coolant the heater wouldn't work. Dealer refilled reservoir the 1st time and said to "Keep an eye on it".
35K miles - Replaced tranny mount and two engine mounts, trying to stop vibration. Still vibrates badly.
Right front hub assembly and steering gear had to be replaced at 31,989 miles.
Intermediate shaft had to be replaced at 28,307 miles.
Tire pressure monitor system has never worked properly, despite three attempts by the dealer to fix it.
Front rotors warped badly from one hard stop with passengers.
Constant ticking in engine at idle, plus annoying "throb" when sitting still at idle in gear. Very bad hesitation from stop. Dealer - " All normal!"
I bought this GM Certified (joke) car with 21K miles on it because my wife loved it. I have owned over 30 vehicles in my life. This is by far the biggest piece of junk of all of them.
My '94 Chrysler LHS had 118K miles on it when we bought the Impala. It now has 152K and the only thing I've replaced on it is a thermostat and a set of tires.
GM DESERVES to go under! They make the worst cars on the planet, period.
A couple of your problems you had were simply (not to minimalize the annoyance) because of a vibration you were experiencing... which you had the dealer (under warranty?) replace the engine and transmission mounts... which turned out were fine being they didn't get rid of vibration. And in the process of replacing the transmission mount it created a leak in the transmission line - other problem listed. Not the cars fault but a hasty job by the mechanic.