There is another link with lots of information that might be useful.
How many miles do you have on your cts? I've got 156K and it's still pulling. My only major repair was getting a new fuel pump. Cost me like 800 at the dealer to have it replace. Had a coil go bad, but so far it's been a pretty good car. I've got a leak somewhere in the ac,but I just keep...
www.cadillacforums.com
Here is my repair history. Fortunately I have a GM extended warranty so haven't paid a dime for any of these repairs.
Year One 2013 (0 - 14500 miles) - was owned by someone else
Year Two 2014 (14500 - 29000 miles)
1. Onstar had to be replaced
2. Heated seat button jammed, console was replaced
3. Driver seat frame had to be tightened, then eventually replaced
4. Front driver door hinges replaced, was making noises when opening and closing door
Year Three 2015 (29000 - 40000 miles)
1. Front left windshield wiper fluid spray leaking
2. Front right headlight replaced because water leaking in
3. Power steering gear, power steering inlet, outlet hose, seals and spacers replaced as makes cracking noise when turning wheel and fluid leaking
4. Front shocks, rack and pinion, sway bar bushing, upper control arm and bracket, lower arm control and brackets, sway bar links and bushings replaced as car was making grinding noises from the front
Year Four 2016 (40000 - 55000 miles)
1. SIR coil replaced
2. Driver airbag sensor had to be reprogrammed
3. Driver seat tensioner and anchor plate replaced
Year Five 2017 (55000 - 70000 miles)
1. Nothing
Year Six 2018 (70000 - 85000 miles)
1. Windshield wiper fluid reservoir cracked and replaced
2. Evaporative emission canister purge solenoid replaced
Year Seven 2019 (85000 - 95000 miles)
1. Water pump and thermostat replaced
Year Eight 2020 (95000 - 99000 miles as of today)
1. Front passenger seat motor replaced
Known issues (stuff that periodically shows up but not constant enough to get the warranty to fix it)
1. Backup camera will periodically not work, sometimes it is after rain, other times it is after opening the trunk a lot
2. Windows auto up and down sometimes doesn't work
3. AC button lights flicker on and off sometimes
4. Clicker noise goes off sometimes (turn blinker works but that clicking noise sometimes doesn't come out)
5. Lug nuts suck, will eventually strip because its a cap. Recommend changing to full solid metal ones asap (like Gorilla). I waited until they stripped and it was a pain trying to get them out.
6. Engine makes a soft grinding noise when accelerating sometimes, was told by tech in a test drive that it is the sound of the car computer ...
7. When weather is colder, if you crank the wheel all the way to one side and back up, there is some sliding and shuddering cracking noise from the suspension
8. One wheel doesn't seal perfectly anymore, loses air a little faster than the others. Not drastic, just have to go in every month to fill tires. If it was at same pace as other tires could probably wait two months.
So it's definitely not been a completely reliable, repair free car, but I also have not paid anything to fix and had a chance to drive almost every Cadillac vehicle as a loaner (ATS, CTS, XT4, XT5, Escalade). The only ones I haven't gotten was any V, XTS, and XT6.