2024 Buick Envision — coolant is old by age but mileage is low

I'd want a measurement, not a hunch. Capture voltage while the 2024 Buick Envision is actually failing — after it restarts you've lost the clue. Don't erase codes until someone who can help has seen them. When does it actually happen? This is the version I'd tell a friend.

This is usually cheaper to test than to guess. If a shop can't duplicate it on the 2024 Buick Envision, bring a video plus freeze-frame data, not just a story. That's the branch I'd chase this week. Have you gotten a second quote in writing? I'm in no rush to be a hero on it.

Start with the test that can prove you wrong. Loaded-suspension checks on the 2024 Buick Envision catch play that a wheels-hanging inspection misses. Don't erase codes until someone who can help has seen them. That's the whole play. Your commute and mine probably aren't the same, but the test still applies. Video is ugly but it shows the hesitation.

Ask what changed right before it started. Swap the cheap/easy piece first on the 2024 Buick Envision and see if the fault moves. Save the big job until that test fails. That's the whole play. Checking again after work.

Intermittent stuff lies if you only catch it once. Two 2024 Buick Envisions can feel identical and have different causes, so measure before you copy someone else's repair. Don't erase codes until someone who can help has seen them. On “coolant is old by age but mileage,” that was the fork that mattered for me. That's the whole play. I'm in no rush to be a hero on it.