2022 Chevrolet Trailblazer

I was driving down the highway when the 3 bolts holding the exhaust under the car broke off. My exhaust was dragging down the highway until I could safely get pulled over. The bolts are welded in of course so you can’t just put new bolts in you have to replace the whole catalytic converter, which is a pain to do unless you take it to the dealer and pay $2000.

All 3 bolts that connect my tailpipe underneath my car failed. This caused the tailpipe to disconnect from the car, meaning I was pushing the pipe as I drove. Luckily it failed when I was at an intersection, and I heard the noise. I was able to drive slowly into a parking lot and disconnect the exhaust for a repair. However, if I had been traveling down a highway when it occurred the pipe surely would've hit a bump and then jammed the rest of the exhaust back up into the under carriage of the vehicle and perhaps causing an accident. I did email the dealership I purchased the vehicle from, but they were unaware of an issues on the vehicle. However, from searching online, there are other 2022 Trailblazer owners experiencing the same issue. There were no warning lights before during or after.

The two components that failed were the water pump and the coolant control valve which caused the engine to overheat, resulting in me having to pull over along the side of a busy highway putting me at risk for injury while the vehicle cooled down. It would be available for inspection upon request. This was dangerous mostly to myself due to having to pull over on the side of a busy highway and wait until the vehicle could be somewhat ok to be driven the rest of the way home. I had to drive very slowly home with my hazards on at a very low speed. Vehicle was brought to a nearby Chevy dealership the following morning. They had the vehicle for two days and claimed they could not get the problem to present itself, however, within five minutes of me driving it off the lot it overheated resulting in having to pull over again on a busy highway. An independent service center had the vehicle and diagnosed it initially as an intermittently failing water pump. This repair did not resolve the issue 100% as the vehicle began to slowly overheat again within 18 minutes of highway speed driving. Car was towed back to repair shop from my place of employment. They were able to get it to present the issue and diagnosed it as the coolant control valve. This has so far appeared to resolve the overheating issue. The vehicle has not been inspected by the manufacturer, police or insurance rep/others. The only warning that came up was on the info screen above the steering column advising me the engine was overheating and was in idle. Immediately upon seeing this I pulled over to prevent any damage. Temp gauge was all the way in the red. Fan was blowing hard. This has never happened previously and there were no other warning lights of any kind on the dash to indicate an issue. This incident happened on 6/2. Please be advised, this vehicle has since been repaired and has ran me $2300 as it is out of warranty.

Vehicle experiences intermittent loss of acceleration at highway speeds. While driving at highway speed or going uphill, up ramp, down hill, down ramp the engine loses power and enters reduce power mode, making it difficult or impossible to maintain speed or safely merge with traffic. The issue is unpredictable and has occurred despite prior repair attempts. Vehicle is covered under a GM special turbo warranty for a known defect. Warranty came out Oct 2022, Due to the loss of power the vehicle is unsafe to operate and is currently at the dealer.

The three bolts at the flange attaching the muffler to the upper muffler sheared off due to rust and the whole rear muffler fell off when driving the car on an interstate. Car is 3 years old and at the time had 65,000 miles. The bolts used are of poor quality, and to make matters worse, there is no exhaust hanger near this flange so the muffler is supported at the front by just this flange. Poorly designed by GM.

The exhaust and muffler completely detached from the catalytic converter/exhaust manifold while driving down the road. If we were driving at a higher rate of speed, the exhaust pipe could've caught on any imperfection on the roadway and shot the rear end of the vehicle up and then potentially caused an accident/death. This has happened to many I have discovered upon further research and is a common problem with the vehicle according to the dealership. Vehicle has been towed to the dealership to be inspected and/or repaired. Zero warning signals, lamps, or messages.

Noise only when cold at front tire passenger side Nosie at front tire passenger side while steering. Check engine lite code PO299 Turbocharger/supercharger underboost-engine power is reduced. Replaced tire at 24600 miles. While driving at 65 mph, the forward collision avoidance system activated, and the car stopped at 65 mph. It happened 5 times that car fully stopped, and numerus time I get forward collision activated but then nothing happens. Imagine on freeway from 65 to 0 brakes by itself. Hard shifting and body shaking while accelerating. Hood is shaking while driving on freeway.