2017 GMC Acadia

When I shift my car to park, it doesn't register that it is in park. It won't let me shut the car off. I can move the gear shift around a bit and it will eventually say it is in park. It can take sometimes up to 10 minutes for me to be able to shut off my car. I have read that this is a known issue and there was a recall, but my vin number was not included for some reason? The issue started about a month ago and has been continually getting worse.

Side Detection Malfunction Message on Dash. Blind spot and cross traffic alerts not working. Vehicle has a blind spot on the driver's side and without this alert, I have found that vehicles appear to not be there but actually which causes issues with merging traffic and lane changes leading to potential collisions. Dealer replaced the side detection modules under warranty and special policy because of water intrusion into the modules. This exact same symptoms and parts have occurred and replaced 5 times, and a 6th is currently needed. All work was performed exclusively at GMAC dealer and vehicle is accident free. GM issued a special policy that covered this specific repair, and the vehicle now needs to it done a 6th time and GM has refused to assist saying vehicle is out of special policy. I have requested that GM inspect the vehicle but no response. I contacted GM and they declined assistance. I currently have the feature turned off because it was providing an error message on the dash and false alerts. I don't believe that GM actually has a long-term fix for this safety issue. Original Set of Sensors - 0 Miles - 2nd set of sensors - 5,894 Miles - 2/2018 3rd set of sensors - 17,078 Miles - 5/2019 4th set of sensors - 32,546 Miles - 4/2021 5th set of sensors - 45,463 Miles - 3/2023 6th set of sensors - 64,335 Miles - 3/2025

Vehicle keeps intermittently coming up with "Power Steering Reduced: Drive with Care," during this my steering is perfectly fine, however my A/C stops blowing cold air, the temperature gauge stops working and my engine fan is running constantly. This is obviously a well known issue since googling that warning and my vehicle it comes up with the issue and what the cause is. Which the cause is from the thermostat remaining open and allowing coolant to run through the system, even when the vehicle is not overheating. I just bought this vehicle used from my local dealership and am surprised that GM has not recognized this is an issue affecting numerous vehicle. This should at the very least be put as a warranty covered issue!

While driving at highway speeds, a warning appeared on the Driver Information Center (DIC): “Steering Assist is Reduced – Drive with Care.” Simultaneously, the temperature gauge was stuck on “C,” the radiator cooling fan ran at high speed, and the air conditioning stopped blowing cold air. After researching the issue, I discovered that these symptoms are commonly linked to a failing thermostat—a known and widespread problem with GM’s 3.6L LGX engine. Unfortunately, replacing the thermostat on this engine is not a simple repair, often requiring significant labor and cost. The most concerning aspect is the loss of steering assist, which poses a serious safety risk, especially at highway speeds. Given the frequency of this issue across many GM vehicles, it’s clear that this is a defective part and not an isolated incident. GM should take responsibility and cover the cost of repairs for affected vehicles. This is not just a mechanical failure—it’s a safety hazard that deserves immediate attention. I'm attaching a picture of the message as well a paid repair invoice from the work the dealer performed to replace the thermostat on my vehicle.

The transmission in my 2017 GMC Acadia needs to be replaced. According to an article from Qulll&Arrow, LLP, transmission problems affected the 2017, 2018, 2019 and some 2020 models, however, my VIN number is not included in this. I am reporting this so it can be documented in case other owners come forward and a pattern can be established.