Water Leaks, Sunroofs & SealsDiagnostic helpCommunity Starter

2024 Buick Envision — footwell gets wet only after heavy rain

ColdStartBuilder211Community StarterAug 18, 20262024 Buick Envision AvenirBoston
2024 Buick Envision Avenir, about 16,500 miles. The car stays dry in normal rain but after a long storm one front footwell gets damp. Door seal looks okay. What drain/seam tests would you do before tearing the interior apart?
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32 replies

SunBeltDriver817Community StarterCommunity StarterAug 18, 2026permalink
I'd want a measurement, not a hunch. Loaded-suspension checks on the 2024 Buick Envision catch play that a wheels-hanging inspection misses. That's the branch I'd chase this week. If it doesn't change the out-the-door or the repair estimate, it's noise. I already checked the easy fluid levels.
BrakeGuy426Community StarterCommunity StarterAug 19, 2026permalink
Not convinced that's the whole story. Get a real battery/charging test on the 2024 Buick Envision, not just resting voltage, before blaming a module. Save the big job until that test fails. Just my two cents from doing this recently. Parking it somewhere I can hear it better next time.
NoMarkupLearner282Community StarterCommunity StarterAug 18, 2026permalink
Ask what changed right before it started. Swap the cheap/easy piece first on the 2024 Buick Envision and see if the fault moves. Don't erase codes until someone who can help has seen them. Write the result down so the next test isn't a repeat of the last one. Make the next action something you can finish this week. I'd rather look cautious in this thread than stuck later.
BoxerScoutCommunity StarterCommunity StarterAug 18, 2026permalink
This is usually cheaper to test than to guess. A pressure test beats staring at a dry driveway if the 2024 Buick Envision is losing coolant with no puddle. That's the branch I'd chase this week. I'd want a dollar figure or a measured spec, not 'should be fine.' A day of patience here is cheaper than a wrong part. If that fails I'll eat the diagnostic fee.
ShiftDIYerCommunity StarterCommunity StarterAug 18, 2026permalink
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. If the cheap test changes it, stop and reassess. This is from a 2024 Buick Envision in Boston with 16,500 miles. Time, temperature, and whether it's in gear are the notes that actually help a shop. A day of patience here is cheaper than a wrong part. That's my plan before I call anyone.
DailyCommuter815Community StarterCommunity StarterAug 18, 2026permalink
Asking because it changes the advice: If a shop can't duplicate it on the 2024 Buick Envision, bring a video plus freeze-frame data, not just a story. If the cheap test changes it, stop and reassess. I'd want a dollar figure or a measured spec, not 'should be fine.' If this is nothing, great. I want that in data.
TowEnthusiast16Community StarterCommunity StarterAug 19, 2026permalink
Quick add on that: Swap the cheap/easy piece first on the 2024 Buick Envision and see if the fault moves. You'll know quickly if you're on the wrong tree. On “footwell gets wet only after heavy rain,” that was the fork that mattered for me. This is from a 2024 Buick Envision in Boston with 16,500 miles. Do that first. I'd rather pay for diagnosis than a second guess-repair.
WeekendFan471Community StarterCommunity StarterAug 19, 2026permalink
I'd push back a little: Move a coil or plug on the 2024 Buick Envision if it's cylinder-specific and see whether the code follows. You'll know quickly if you're on the wrong tree. I'd want a dollar figure or a measured spec, not 'should be fine.' Next check is the cheap one I can do in a driveway.
V8CollectorCommunity StarterCommunity StarterAug 18, 2026permalink
If it were in my driveway, move a coil or plug on the 2024 Buick Envision if it's cylinder-specific and see whether the code follows. If the cheap test changes it, stop and reassess. When does it actually happen? Happens in gear, not in park, for what that's worth.
DealTraveler677Community StarterCommunity StarterAug 18, 2026permalink
Log the conditions before you spend. Write temp, speed, and in-gear vs coast when the 2024 Buick Envision does it — then decide on parts. Save the big job until that test fails. On “footwell gets wet only after heavy rain,” that was the fork that mattered for me. A shop burned me once by skipping that step. Not interested in a five-hour wait for a shrug.
ManualMechanicish811Community StarterCommunity StarterAug 18, 2026permalink
Log the conditions before you spend. Loaded-suspension checks on the 2024 Buick Envision catch play that a wheels-hanging inspection misses. That's the branch I'd chase this week. On “footwell gets wet only after heavy rain,” that was the fork that mattered for me. Had a similar mess a couple years ago and that's what finally sorted it. This is me being the wet blanket on purpose.
ColdStartBuilder211Community StarterCommunity StarterAug 18, 2026permalink
It did footwell gets wet only after heavy rain twice this week, both times after sitting. No change in mileage feel. Parking it somewhere I can hear it better next time.
V8CollectorCommunity StarterCommunity StarterAug 18, 2026permalink
I wouldn't throw parts yet. Two 2024 Buick Envisions can feel identical and have different causes, so measure before you copy someone else's repair. Save the big job until that test fails. Have you gotten a second quote in writing? Heat soak after errands is the other window.
ColdStartBuilder211Community StarterCommunity StarterAug 20, 2026permalink
I went back under the 2024 Buick Envision and it only happens after a heat soak, not on a cold start. I keep a notes app thread for this now.
DailyCommuter815Community StarterCommunity StarterAug 18, 2026permalink
Start with the test that can prove you wrong. Two 2024 Buick Envisions can feel identical and have different causes, so measure before you copy someone else's repair. That's the branch I'd chase this week. Run the total, not the monthly, before you commit. I've seen both outcomes, which is why I'd test instead of assume. I'd rather look cautious in this thread than stuck later.
ManualMechanicish811Community StarterCommunity StarterAug 20, 2026permalink
That's a good start, but I wouldn't stop there. If a shop can't duplicate it on the 2024 Buick Envision, bring a video plus freeze-frame data, not just a story. If the cheap test changes it, stop and reassess. A shop burned me once by skipping that step. This is me being the wet blanket on purpose.
NoMarkupLearner282Community StarterCommunity StarterAug 18, 2026permalink
Start with the test that can prove you wrong. Move a coil or plug on the 2024 Buick Envision if it's cylinder-specific and see whether the code follows. That's the branch I'd chase this week. Time, temperature, and whether it's in gear are the notes that actually help a shop. Heat soak after errands is the other window.
WeekendFan471Community StarterCommunity StarterAug 18, 2026permalink
I'd want a measurement, not a hunch. Write temp, speed, and in-gear vs coast when the 2024 Buick Envision does it — then decide on parts. Save the big job until that test fails. Run the total, not the monthly, before you commit. This is the version I'd tell a friend.
TowShopperCommunity StarterCommunity StarterAug 18, 2026permalink
Intermittent stuff lies if you only catch it once. Capture voltage while the 2024 Buick Envision is actually failing — after it restarts you've lost the clue. You'll know quickly if you're on the wrong tree. On “footwell gets wet only after heavy rain,” that was the fork that mattered for me. Keep sale price, fees, and rate as three different conversations. Climate here is different, so treat that as a local data point. Heat soak after errands is the other window.
TowDriverCommunity StarterCommunity StarterAug 19, 2026permalink
If it were in my driveway, get a real battery/charging test on the 2024 Buick Envision, not just resting voltage, before blaming a module. You'll know quickly if you're on the wrong tree. Write the result down so the next test isn't a repeat of the last one. I'd sleep better after that step, even if it finds nothing. Video is ugly but it shows the hesitation.
WeekendFan471Community StarterCommunity StarterAug 19, 2026permalink
I hear you, though I'd still want a second check. Two 2024 Buick Envisions can feel identical and have different causes, so measure before you copy someone else's repair. If the cheap test changes it, stop and reassess. On “footwell gets wet only after heavy rain,” that was the fork that mattered for me. Run the total, not the monthly, before you commit. I'm keeping receipts and dates in one folder.
V8BuilderCommunity StarterCommunity StarterAug 19, 2026permalink
I wouldn't throw parts yet. Two 2024 Buick Envisions can feel identical and have different causes, so measure before you copy someone else's repair. You'll know quickly if you're on the wrong tree. This is from a 2024 Buick Envision in Boston with 16,500 miles. Was this after sitting overnight? That's my plan before I call anyone.
SunBeltDriver817Community StarterCommunity StarterAug 19, 2026permalink
Ask what changed right before it started. 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. I'd want a dollar figure or a measured spec, not 'should be fine.' Doing the boring step first on purpose.
BoxerScoutCommunity StarterCommunity StarterAug 19, 2026permalink
Quick add on that: Write temp, speed, and in-gear vs coast when the 2024 Buick Envision does it — then decide on parts. Save the big job until that test fails. I'd want a dollar figure or a measured spec, not 'should be fine.' Happens in gear, not in park, for what that's worth.
ProjectGarageCommunity StarterCommunity StarterAug 19, 2026permalink
I'd push back a little: Two 2024 Buick Envisions can feel identical and have different causes, so measure before you copy someone else's repair. Save the big job until that test fails. Verbal 'we'll take care of it' is not a plan. Cold start is when I can actually reproduce it.
BoxerScoutCommunity StarterCommunity StarterAug 19, 2026permalink
I'd want a measurement, not a hunch. Swap the cheap/easy piece first on the 2024 Buick Envision and see if the fault moves. You'll know quickly if you're on the wrong tree. If it doesn't change the out-the-door or the repair estimate, it's noise. Cold start is when I can actually reproduce it.
ColdStartBuilder211Community StarterCommunity StarterAug 19, 2026permalink
It did footwell gets wet only after heavy rain twice this week, both times after sitting. No change in mileage feel. I'd rather pay for diagnosis than a second guess-repair.
ColdStartBuilder211Community StarterCommunity StarterAug 19, 2026permalink
Checked the easy stuff on the 2024 Buick Envision and found one clue worth chasing before I book a shop. I'm keeping receipts and dates in one folder.
V8CollectorCommunity StarterCommunity StarterAug 19, 2026permalink
Intermittent stuff lies if you only catch it once. A pressure test beats staring at a dry driveway if the 2024 Buick Envision is losing coolant with no puddle. If the cheap test changes it, stop and reassess. On “footwell gets wet only after heavy rain,” that was the fork that mattered for me. When does it actually happen? No warning lights, which is why I'm documenting it.
SunBeltDriver817Community StarterCommunity StarterAug 19, 2026permalink
Intermittent stuff lies if you only catch it once. Capture voltage while the 2024 Buick Envision is actually failing — after it restarts you've lost the clue. Save the big job until that test fails. On “footwell gets wet only after heavy rain,” that was the fork that mattered for me. This is from a 2024 Buick Envision in Boston with 16,500 miles. If it doesn't change the out-the-door or the repair estimate, it's noise. I'd rather look cautious in this thread than stuck later.
TowShopperCommunity StarterCommunity StarterAug 19, 2026permalink
I wouldn't throw parts yet. Move a coil or plug on the 2024 Buick Envision if it's cylinder-specific and see whether the code follows. Save the big job until that test fails. Keep sale price, fees, and rate as three different conversations. I've seen both outcomes, which is why I'd test instead of assume. This is me being the wet blanket on purpose.
ColdStartBuilder211Community StarterCommunity StarterAug 19, 2026permalink
Cleared nothing. I want service to see the alert on the 2024 Buick Envision first. This is the version I'd tell a friend.
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