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Plan d’maintenance Buick Regal VI GS
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📖Buick Regal VI GS: high-performance V6 liftback demanding Twinster AWD and adaptive chassis care

Buick Regal VI GS (2018-2020)

The Regal VI GS transformed Buick's mid-size nameplate into a true sports liftback. Built on GM's E2XX platform (derived from the Opel Insignia GSi), it ditched the four-cylinder turbo for a naturally aspirated 310 hp 3.6-litre V6 paired with Twinster all-wheel drive, Brembo front brakes and Continuous Damping Control. Maintaining this dynamic flagship requires dedicated Buick Regal maintenance, focusing on high-performance driveline fluids and active suspension.

Beneath the bonnet sits the responsive 3.6-litre 3.6 LGX V6 with cylinder deactivation, driving through GM's fast-shifting 9-speed automatic transmission. Handling is managed by GKN's innovative Twinster AWD system utilising twin rear clutches for active torque vectoring, while massive four-piston Brembo brakes clamp 345 mm front discs.

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Garajo prépare votre garage et vous permet ensuite de suivre les maintenances, les rappels et les points à surveiller.

UKGB

Owner notes

The reassuring points, known weak spots and deadlines you should not let slip.

Reassuring points

Reliability
  • Characterful naturally aspirated 310 hp V6 engine delivering an inspiring exhaust note and linear pull.
  • Sophisticated Twinster AWD and Brembo front brakes providing phenomenal cornering grip and stopping power.
  • Superb AGR-certified performance bucket seats with heating, ventilation and massage functions.

Chronic weak spots

Keep an eye on
  • Twinster rear differential clutch fluid: change fluid preventively to avoid rear-axle shudder during tight turns.
  • Continuous Damping Control (CDC) dampers: inspect electronically controlled shock absorbers for fluid leaks.
  • 9-speed 9T65 automatic gearbox: check for smooth gear shifts and ensure transmission fluid is fresh.
  • Brembo front brake discs and pads: inspect 345 mm discs for thermal grooving and pad wear.
  • 19-inch alloy wheels and low-profile tyres: check for pothole impact damage on inner wheel rims.

Critical deadlines

Do not miss
  • Engine oil and filter renewal: perform every 8,000 to 10,000 km or 12 months with dexos1 Gen 3 oil.
  • Twinster AWD differential service: drain and refill rear drive unit fluid every 40,000 to 50,000 km.
  • Automatic transmission service: service 9-speed gearbox fluid every 60,000 to 80,000 km.
  • Brake fluid service: flush high-temperature hydraulic fluid every 24 months regardless of mileage.

Fréquences d'maintenance recommandées

Service markers for petrol/diesel versions. Exact intervals vary by engine and model year.

Oil change

Every 15 000 km

Every 1 year

Service

Every 15 000 km

Every 1 year

Brake pads

Every 30 000 km

Every 2 years

Poids ou puissance élevés : usure des number platettes accélérée sur certaines versions

Timing belt / chain

Every 100 000 km

Every 5 years

Battery (12 V)

Every 50 000 km

Every 4 years

Powertrains and average consumption

Average consumption from manufacturer data for the versions available in this generation.

Petrol and diesel powertrains
▾

Petrol, diesel or LPG versions. The intervals shown cover the usual mechanical jobs.

Regal VI GS

Estimated average budget

Standard cost

Servicing a Buick Regal VI GS sits in line with the market average.

Simple oil change~100 €
Full service~275 €
Front brake pads~130 €
Timing-belt kit~650 €
Tyres (set of 4)~400 €

* Indicative estimates for parts and labour.

Frequently asked questions about Buick Regal VI GS

What are the common problems on the Regal VI GS?▾
Regal VI GS owners should especially watch: Twinster rear differential clutch fluid: change fluid preventively to avoid rear-axle shudder during tight turns. Continuous Damping Control (CDC) dampers: inspect electronically controlled shock absorbers for fluid leaks. Garajo includes these watch points so you can act early.
When should you change the timing belt on a Regal VI GS?▾
The timing belt is usually replaced every 100,000 km or 5 years on this type of engine.
Where can I find the service book for the Buick Regal VI GS?▾
Garajo offers a free digital service book, always up to date, with reminders and a detailed history for your Buick Regal VI GS.
How much does it cost to service a Buick Regal VI GS?▾
The service budget for a Buick Regal VI GS sits in line with the market average. Allow about 275 € for a full service, for example. Garajo estimates your budget by powertrain and tracks what you actually spend, for free.
Which Buick Regal VI GS powertrain is best for town use?▾
This model is only available as petrol/diesel. Fuel mix: 1 petrol version. In town, prefer the most economical, well-serviced petrol/diesel version.
Which Buick Regal VI GS powertrain should you choose if you mostly drive on the motorway?▾
This model is only available as petrol/diesel. Fuel mix: 1 petrol version. On the motorway, prefer petrol/diesel versions with the best power-to-consumption compromise.

Compatible engine oil

Which engine oil for Buick Regal VI GS?

These links are limited to the engines of this generation when oil data is available.

Unsure between two viscosities?5W-30 vs 0W-300W-20 vs 0W-305W-30 vs 5W-40
← All Regal generationsAll Buick models

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