Plan d’maintenance Buick LaCrosse III

Online service book

Generations :LaCrosse I LaCrosse I (facelift 2008)LaCrosse II LaCrosse II (facelift 2014)LaCrosse IIILaCrosse III China LaCrosse III China (facelift 2019)LaCrosse IV All →

📖Buick LaCrosse III: lightweight P2XX architecture demanding proactive 9T65 and Twinster AWD care

Built on GM's advanced P2XX modular architecture, the third-generation Buick LaCrosse shed an impressive 136 kg while growing longer, lower and wider. Featuring a striking new grille inspired by the Avenir concept, an electronic joystick gear selector and five-link rear suspension, it drove with newfound agility and sophistication. Preserving this flagship saloon calls for methodical Buick LaCrosse maintenance, especially for its modern drivetrain and chassis electronics.

Under the sleek bonnet sits the 310 hp 3.6 LGX V6 equipped with cylinder deactivation and engine stop-start, coupled initially to an 8-speed automatic and later to GM's refined 9-speed 9T65 automatic. Available all-wheel-drive models feature the twin-clutch Twinster AWD system with torque vectoring. The sophisticated chassis delivers both crisp handling and benchmark soundproofing.

Suivi free

Entrez votre number plate d’number plate afin de suivre freeement votre LaCrosse III

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

Owner notes

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

Reassuring points

Reliability

Significant weight reduction delivering vastly sharper handling and improved fuel economy.
Potent 310 hp LGX V6 engine delivering effortless overtaking power and smooth motorway cruising.
First-rate cabin craftsmanship with floating centre console and flagship Avenir luxury trim.

Chronic weak spots

Keep an eye on

9T65 9-speed automatic transmission: check for software updates addressing low-speed shift flares.
Twinster AWD rear differential: inspect clutch fluid for degradation to prevent rear axle shudder.
Electronic gear shifter (ETRS): verify consistent engagement of park and drive without error messages.
Stop-start auxiliary battery: check 12V battery health to avoid intermittent stop-start failures.
Head-up display and ADAS cameras: ensure driver-assistance features initialize properly without warnings.

Critical deadlines

Do not miss

Engine oil and filter renewal: perform every 10,000 km or 12 months using dexos1 Gen 3 oil.
Automatic transmission service: drain and refill 9T65 gearbox fluid every 60,000 to 80,000 km.
Twinster AWD differential service: change rear drive unit fluids every 50,000 km.
Brake fluid service: flush hydraulic fluid every 24 months to maintain braking safety.

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 to 40 000 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.

LaCrosse III

Estimated average budget

Mid-range cost

Servicing a Buick LaCrosse III sits slightly above the market average (+22%).

Simple oil change~115 €

Full service~355 €

Front brake pads~150 €

Timing-belt kit~650 €

Tyres (set of 4)~495 €

* Indicative estimates for parts and labour.

Frequently asked questions about Buick LaCrosse III

What are the common problems on the LaCrosse III?▾

LaCrosse III owners should especially watch: 9T65 9-speed automatic transmission: check for software updates addressing low-speed shift flares. Twinster AWD rear differential: inspect clutch fluid for degradation to prevent rear axle shudder. Garajo includes these watch points so you can act early.

When should you change the timing belt on a LaCrosse III?▾

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 LaCrosse III?▾

Garajo offers a free digital service book, always up to date, with reminders and a detailed history for your Buick LaCrosse III.

How much does it cost to service a Buick LaCrosse III?▾

The service budget for a Buick LaCrosse III sits slightly above the market average (+22%). Allow about 355 € for a full service, for example. Garajo estimates your budget by powertrain and tracks what you actually spend, for free.

Which Buick LaCrosse III powertrain is best for town use?▾

This model is only available as petrol/diesel. Fuel mix: 3 petrol versions. In town, prefer the most economical, well-serviced petrol/diesel version.

Which Buick LaCrosse III powertrain should you choose if you mostly drive on the motorway?▾

This model is only available as petrol/diesel. Fuel mix: 3 petrol versions. On the motorway, prefer petrol/diesel versions with the best power-to-consumption compromise.

Compatible engine oil

Which engine oil for Buick LaCrosse III?

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

← All LaCrosse generations All Buick models

Ne ratez plus jamais un maintenance

Gérez l'maintenance de votre Buick LaCrosse III freeement.
Centralise your history and spending in a few clicks.Téléchargez le service book de votre Buick LaCrosse III en PDF à tout moment.

Créer mon carnet (Free)

Créer mon service book