Engine overheats or leaks coolant

What got replaced

Owners who name the part that was replaced mention the thermostat (20 reports).

Recalls and investigations

No recall on the engine covers the 2019 model year as of Sep 20, 2026.

When it happens

The middle half of failures fell between 48,500 and 70,000 miles, from the 10 reports that gave a mileage.

What owners wrote

“I bought a car about 2 months ago and they did not tell me the thermostat was bad and they won’t cover it.”

Filed Nov 23, 2025

“Due to negligence of gmc wright of wexford during the replacement of 3rd new transmission they did not clamp a hose together causing coolant to leak and my thermostat to come on n off. Causing further damage to my vehicle”

Filed Oct 12, 2025

“Unknown My 2019 Acadia Denali has/is been repaired 6 times in 1 1/2 years for engine oil leaks , has had transmission repairs twice , radiator repair and replacement. Also suspension warranty work as well . I feel the oil leaks is and has been excessive and dangerous due to no warning lights never displayed to alert me to check oil”

Filed Sep 3, 2025

“My coolant thermostat went out, causing my AC and steering assist to stop working. I have spoke to multiple other people who have had this same issue with their GMC Acadia and I believe this should be a recall. It’s going to cost me $1200 to have this issue resolved.”

Filed Jun 29, 2025

Other problems on this car

• Engine stalls or loses power while driving 58 reports
• Infotainment, screen or backup camera fails 47 reports