general problems of the 2017 Cadillac XT5

Catalytic converter on my 2017 Xt5 had weld crack oct 2025. Causing loud noise and exhaust to enter cabin of vehicle. This was the second convertor to do this. In 2023 I had to have the other catalytic convertor on this same vehicle changed out by the sewell Cadillac dealership for the same problem. That time I only had 50,000 miles on the car so the dealership did it for free (after I found that they had to cover up to 80,000 and they acted like they didn't know that and had quoted me $2000). This time in 2025 I had 80,805 miles so I had to pay $1010 to have it replaced by an outside repair shop. The technician says since we had to have them both replaced and the car is only 8 years old, it is probably a design flaw. He told me to report it. I see another complaint for the same thing and I see they did a recall on some from California vehicles for something with the catalytic convertor and a recall on some in 2022 and 2023 vehicles for an issue with the catalytic convertor. I expected better from gm and Cadillac. I wonder how many other Cadillac Xt5 owners have had this problem but haven't known to report it. You should contact the Cadillac dealerships and see how many they have changed out.

An issue is pipe cracking at the left catalytic converter mounting flange weld, causing exhaust noise, odor, and potential emission system failure. It just cost $2013. 00 to have fixed.

While driving my vehicle, alert popped up on my dash stating "steering assist is reduced drive with care" futhermore after that my check engine light turned on and my engine heater stayed cold and would not warm up. Vehicle has been inspected by the Cadillac dealer and they stated it is all due to the sensor. However sensor is on backorder and has taken them 3 week to get the part. They stated it is safe to drive even though all those alerts came up, since he said it appears to be stuck open, however they stated if it gets stuck in a closed state then the engine could overhead which would require having the vehicle towed in. They offer a "limited" warranty on this however since I just was past the warranty period they state you have to pay the full price. Warranty is for 85,000 miles and I am barely above it at 87675.

Our Xt5 began getting 'steering assist reduced' message about a year ago. It comes and goes , coming more often now. The problem is the thermostat and is a very common issue with numerous complaints here and on Cadillac forums (below). The problem is, when this issue occurs the ac stops working, and when that happens you have no windshield defrost, and that is a safety problem. Cadillac has TSB's describing this issue but refuses to cover it goodwill as we are slightly out of warranty. The repair is extensive, requiring 4. 5 of time. [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

This model Cadillac Xt5 has early failures of engine cooling systems thermostats. The thermostat sticks open causing lower engine temperatures and higher emissions. The first sign you have an issue is a reduced power steering assist message on the instrument display. The engine control module stores a p0128 code as current. Continue driving the vehicle the ecm will shut off ac compressor engagement, so no ac. The next thing that happens is you lose temperature gauge. So you are now driving vehicle with reduced power steering assist, no ac and no way of knowing if the engine is overheating. This is a known issue with the refer to gm bulletin # 17-na-158 posted may 2017. There has been a such a demand for this thermostat, that parts back orders are common. The volume of failures should be addressed as a recall including refunds to owners who have had to pay for this repair. The fact that a colder running engine typically runs richer based on ecm programming, causes higher emissions. Gm hasn’t been helping people with this repair for out of warranty vehicles. Our 2017 Xt5 failed at 38,000 miles. Cadillac only offered to pay 30% of the repair leaving a balance of $585. 00! this was all because gm’s failed part.

Ecm- engine system. Diagnostic code p26c8. Chassis control module requested malfunction indicator lamp illumination. The dtc is an informational dtc. The dtc indicates an emission related dtc set in the chassis control module. My service transmission message came on and would not let me go into reverse or drive. The next day the check engine light was on. This vehicle is only 34,650 miles and is a 2017. I bought it on Saturday and this happened on Wednesday!.

The thermostat is malfunctioning. Vehicle has less than 50,000 miles. Driving vehicle and dash warning" steering assist is reduced drive with care", also the temperature gauge was showing cold and this was after driving for over 30 minutes. Contacted local dealer and was informed this is a known problem with the thermostat sticking open. If this had been in the summer the a/c would not have worked. I was informed I could bring in the vehicle to have the codes cleared and the parts would have to be ordered. Due to backlog of parts, it was unknown when the parts would be available. In searching internet there are a significant number of owners who have experienced the same issue. In consulting the mechanic, I use, I was informed this is an issue with the motor in my vehicle. The same motor is in other GMC products, and he has 3 vehicles in his shop with the same issue waiting parts.

The thermostat has malfunctioned twice in 2 years. Driving vehicle and dash warning" steering assist is reduced drive with care", also the temperature gauge was showing cold and this was after driving for over 30 minutes. Contacted local dealer and was informed this is a known problem with the thermostat sticking open. My brakes are sticking often and my car often jumps hard when I put it in reverse.

The contact owns a 2017 Cadillac Xt5. The contact stated that while driving approximately 40 mph the vehicle over heated and stalled. The power steering assist was reduced and drive with care messages were displayed. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The vehicle was taken to an independent mechanic who informed about the thermostat, engine, and code p0128. The manufacturer was not contacted. The approximate failure mileage 43,806.

Engine light comes on, brake assist service light comes on when transmission idles down at stop signs, stabilitrak service light comes on after transmission idles down after a stop. This has happened twice and I had to get it repaired.

Xt5 bumper-to-bumper warranty expired on 6-1-21. Both key fobs suddenly quit working on 7-17-21. Took to dealer 7-21-21. Cost me $300. Got it back on 7-26-21. Drove vehicle for the first time after getting it back on 7-28-21. Key fob quit working again briefly then started after I kept trying for a few minutes. After driving for 5 miles, the car completely died on very busy road - no steering, no dash lights, break lights - then the car suddenly braked really hard and I almost got rear-ended. 4-way flashers wouldn't work so I had no way to warn other drivers coming up behind me. I also was a sitting duck as I couldn't exit the vehicle since the doors wouldn't unlock and windows wouldn't go down. The temperature was in the 80s and I quickly began to overheat. I tried to signal other drivers who were beeping their horns and swerving around me until several pulled over to help. After approx. 10-15 minutes, as I was calling 911, the doors unlocked and I got the 4-ways to come on though they were working erratically. I called the dealership and they came and picked up the car. They've had it for a week and don't know what's wrong with it. This is a potentially deadly safety issue; I could have died or caused someone else to be injured or die due to the car suddenly losing all power while driving in heavy traffic with no warning, then braking hard and very unexpectedly, along with the inability to warn other drivers due to the inoperable 4-ways I also could have succumbed to hyperthermia as there was no way to escape from an extremely hot car. It appears that after doing some basic research, that this is not an isolated problem with the 2013-2017 Xt5s. There are numerous reports of incidents similar or identical to mine found on various Cadillac owners online forums. Additionally, a common complaint is that this problem has not yet been solved yet by general motors and their dealerships are at a loss to resolve this issue (they haven't been able to fix mine yet!).

Cause unknown. With the engine just turned off and vehicle stationary in a garage, I leaned into the rear compartment to retrieve articles and the vehicle moved forward. Once again l leaned into the rear and it moved forward. I then started the engine, did not put it into gear, but simply turned it off. I leaned into the rear and once again the vehicle moved forward.

The vehicle is using about one half quart of oil every 1000 miles. About half way through oil change, the engine add oil light comes on. Dealer has so far said this is "normal".

I just got this car delivered to my home on 01/11/2019, then it id not want to start after jump starting it worked then shut off so I was going to the dealeship while driving onthe expressway the car just completely shut off would not start , so had it towed to the dealership thinking it was the battery now it has to be there till Monday or Tuesday,.

My car is equipped with the auto stop feature to save fuel. I works fine but is very unsafe on hills here in seattle. Two weeks ago I was stopped at a light on a hill and the engine turned off. I had a free right so I stepped on the gas pedal, there was a delay but before I could take my foot off the accelerator my car lunged forward in the intersection almost striking a pedestrian who was j walking. The next incident happened today when I was at a 4 way stop on a hill. There was a car on my left that was waiting for me to go since it was my turn and I stepped on the pedal and there was a delay so I pushed harder. The other car thought I was waiting for them so they went and then my car lunged forward and came within a foot of hitting them. They were not too happy and gave me a well deserved finger gesture. I believe my car may cause an accident because of this. The dealer said they could not turn off the feature. I called the Cadillac company and filed a complaint but have not heard from them. I would like to have the feature turned off. I know its for gas mileage but I can afford the gas.