While highway driving, engine suddenly lost power and car could not exceed 5 mph. Was able to get off at next exit and get to a local garage. Mechanic inspected. Bolt connecting high pressure fuel pump to cylinder sheared off leaving bolt body in cylinder, bending fuel pump and caused oil to spray over entire engine compartment. Repair unlikely. Engine will likely need to be replaced. Car has always been maintained. No indication of failure prior to incident.

- East Hanover, NJ, USA

GM issued Special coverage N192210240 for repair/replacement of the evaporative emissions purge valve because it may not fully close. The special coverage states that the dealer is to replace the part at no cost to the customer as necessary until 150,000 miles or 11/12/2026 whichever occurs first. Since owning the vehicle in question I have had this particular part replaced three (3) times, approximately every 20,000 miles. Each time this particular part fails my check engine light is illuminated, my vehicle stalls immediately after refueling, my garage and home quickly fill with emission fumes upon starting the vehicle, and the vehicle idles rough when stopping. The GM dealership replaced the part the first 2 times it failed at no cost to me stating that it was covered under GM Special Coverage, but the third and most recent time refused to honor the special coverage. They, instead, stated that I had to pay $189.99 for a diagnostic in addition to the cost of the repair despite the fact that my vehicle was still within the special coverage parameters and the special coverage bulletin states "as necessary". The dealership stated that the special coverage was only a one-time use, and I was to pay for repairs each additional occurrence. There is clearly an issue with this part, and GM has acknowledged that by offering the special coverage. This coverage should be valid for the entire time stated because this is clearly a faulty part.

- Canal Winchester, OH, USA

I was traveling at the posted speed limit of 80 mph on [XXX] in South Dakota at [XXX] and the GMC Acadia was working without any issue when all of a sudden various warnings flashed on the dashboard with one of them being power saver mode engaged. Within about 3 minutes various other warnings flashed and the vehicle motor turned off along with all of the electrical systems. Luckily, I was able to maneuver the GMC Acadia to the shoulder of the highway safely. The vehicle would not start and for about a minute or so we were trapped in the Acadia. We could not unlock the doors or wind down the windows until I pressed the start/stop bottom several times. Onstar did not work either. Once we could get out of the Acadia, my wife called 911 and in roughly 20 minutes or so, a police officer arrived at our location. We also called AAA and had a tow truck take the broken down GMC Acadia to a garage for repairs. It turns out that the alternator went bad and rendered our GMC Acadia useless in roughly 3 minutes from the initial warning. There was absolutely none of the tell tale warnings of a bad alternator. We did not see or observe any dim lights, hesitating starts or any other things associated with a bad alternator prior to the 3 minute warning before the vehicle completely was inoperable. We are very lucky to be alive. If [XXX] was more congested with traffic at the time of this incident, we might have been serious injured if not killed. IMO this GMC Acadia is a death trap. This vehicle warns the driver when the key fob-??s battery is low many weeks before it needs to be replaced. It should warn you more than 3 minutes if not several hours prior to the vehicle being completely immobilized. It should be noted that the check engine light came on several hours before this incident and I called Onstar and they ran the diagnostics and returned a P0420 code which is related to emissions. The check engine light turned itself off about 1 hour before incident. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMAT

- Mount Joy, PA, USA

At roughly 50,000 there is a transmission line leak in the vehicle. GM has already recalled 2018-2020 model-year GMC Acadia SUVs and other models for this problem due to risk of fire. Whether it is the same cause or not, such a problem leads to the same risk.

- Troy, MI, USA

Starting vehicle after 10 hours of vehicle not running, the vehicle cranks/has a delayed start for approximately 4 to 8 seconds. Battery, alternator and start was check and all was in working order. I was told the issue may be a defective fuel pump, due to the engine losing fuel pressure after not running for an extended period of time.

- Tucson, AZ, USA

We purchased a 2017 Acadia AWD slt on December 28, 2017. There was a recall on GM bulletin #19-na-206 for (shift to park) issue. Dealer michael hohl GMC 3700 S carson St, carson city, nv 89701 ordered part but was not installed until 1/13/20. Day after repairs, fueled car and gas gauge would show three quarters full. The fuel range also bounces up and down and is not accurate. Is this a GM recall issue? my car is now out of the bumper to bumper warranty to repair this gas gauge problem. We are concerned that we might run out of fuel due to faulty gas gauge reading or was this a problem created by R/R in-line shifter wire harness jumper. Car was at dealer for repair (in warranty) @ 27,762 under mileage and is now out of warranty due to three year time span. Now @27,784 miles.

- Minden, NV, USA

Oct 23, 2019 we were supposed to bring our car for a service because the check engine is on but before we even get to the dealer the car won't start. We have to call for a towing company. When we get there they said they don't know what's wrong. We called GMC complaint before we got an answer with the dealer on Oct 30 they said its a fuel pump recall. Since then we haven't heard from them. It will 6 weeks this week. We just bought this car as certified pre owned last April 2019 now we cant't use it and no updates at all. We don't know when will have our car back.

- East Elmhurst, NY, USA

2 instances within a 2 week period. On 12/13/2017 vehicle is being driven and engine power is lost and car turns off we had to pull over side of the road when trying to restart the car it sputters and wont start.. 2nd instance on 12/24/2017 car was once car was put in gear it stalled would not restart or even turn over. Dealer replaced battery and fuel pump regulator module the 1st time. 2nd time dealer does not know what the problem is.

- Colonia, NJ, USA

The gas gauge indicator showed 90 miles until empty, but was actually empty. This ourred during a family trip from northern California to southern California. We ran out of gas on top of the grapevine. Finally, after a 3 hour wait, road service brought gas and we were on our way to the nearest gas station.

- Antelope, CA, USA