ServlogUpdated 2026-07-02
Buick Enclave Transmission Fluid: Change Interval
Compiled & reviewed by Nikolai Tsyrenov · Updated 2026-07-02
When to change the transmission fluid on a 2018-2024 (3.6L V6 era; 2025+ switched to 2.5L turbo) Buick Enclave.
In short: Buick Enclave transmission fluid: 9-speed auto; ~97,500 mi (or severe service ~45,000 mi).
| Transmission Fluid interval | 9-speed auto; ~97,500 mi (or severe service ~45,000 mi) |
|---|---|
| Engine / drivetrain | 3.6L V6 (LFY), 0W-20 dexos1 Gen 3, 9-speed auto |
| Model years | 2018-2024 (3.6L V6 era; 2025+ switched to 2.5L turbo) |
Why it matters: Transmission fluid lubricates and cools the gearbox. "Lifetime fill" really means "lifetime of the warranty" — heat from towing, hills and stop-and-go traffic ages it much faster.
A drain-and-fill (not a flush) is the safe approach, especially on higher-mileage cars. Use ONLY the exact fluid spec for your transmission — the wrong fluid can ruin a CVT or automatic.
Buick Enclave note: GM's high-feature 3.6 V6 has a history of timing-chain stretch on earlier versions — on-time (or early) oil changes are the single best prevention. The 2025+ Enclave dropped the V6 for a 2.5L turbo, so this applies to 2018-2024.
FAQ
How often should you change the transmission fluid in a Buick Enclave?
9-speed auto; ~97,500 mi (or severe service ~45,000 mi).
Should I flush or drain-and-fill the transmission on a Buick Enclave?
Prefer a drain-and-fill. A pressure flush on an old, never-serviced transmission can dislodge debris; a simple drain-and-fill (repeated if needed) is the gentler, widely recommended option.
Where can I check all Buick Enclave service intervals?
The full Buick Enclave maintenance schedule covers oil, tires, fluids, filters and major milestones for the 2018-2024 (3.6L V6 era; 2025+ switched to 2.5L turbo) model years.
← Full Buick Enclave maintenance schedule · Transmission Fluid intervals for all cars
General guidance — confirm against your Buick Enclave owner's manual.
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