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Plan d’maintenance Buick LaCrosse II
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📖Buick LaCrosse II: European-engineered luxury saloon demanding strict timing chain and fluid upkeep

Buick LaCrosse II (2009-2013)

Built on GM's sophisticated Epsilon II platform shared with the Opel Insignia, the second-generation Buick LaCrosse abandoned old-school styling for a sleek, sculpted body and an upscale modern cockpit. Offering optional all-wheel drive, adaptive suspension and an ultra-quiet cabin, it set a new benchmark for American luxury saloons. Sustaining this executive tourer requires methodical Buick LaCrosse maintenance, especially regarding timing chain lubrication and automatic transmission servicing.

Powertrains included the 2.4-litre Ecotec (available with eAssist mild-hybrid technology) and the direct-injected 3.6-litre 3.6 LLT V6 producing 280 to 303 hp, paired with a 6-speed 6T70 automatic gearbox. The high-feature V6 is notorious for premature timing chain wear if oil changes are neglected. Direct injection also causes carbon buildup on intake valves over extended mileage.

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Owner notes

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

Reassuring points

Reliability
  • Outstanding cabin quietness with QuietTuning acoustic laminated glass and active sound cancellation.
  • Potent 3.6-litre V6 providing strong passing acceleration and smooth, refined high-speed cruising.
  • Modern, sculpted interior design featuring ice-blue ambient lighting and premium dashboard materials.

Chronic weak spots

Keep an eye on
  • 3.6 V6 timing chains: strictly monitor cold-start rattle and change engine oil at shortened intervals.
  • Direct-injection intake valve coking: inspect for rough cold idle and hesitation caused by carbon deposits.
  • 6T70 6-speed automatic gearbox: inspect for delayed engagement, shift flares or worn wave plates.
  • Rear suspension toe links: verify that the safety recall for rust-prone toe link joints was completed.
  • Electronic throttle body: check for carbon accumulation causing erratic idle and reduced engine power warnings.

Critical deadlines

Do not miss
  • Engine oil and filter renewal: perform every 8,000 to 10,000 km or 12 months with dexos1 synthetic oil.
  • Automatic transmission service: replace 6T70 gearbox fluid every 60,000 to 80,000 km.
  • Brake fluid service: flush hydraulic fluid every 24 months regardless of distance.
  • Spark plug replacement: renew iridium spark plugs every 100,000 km.

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 II

Estimated average budget

Mid-range cost

Servicing a Buick LaCrosse II sits slightly above the market average (+15%).

Simple oil change~110 €
Full service~350 €
Front brake pads~160 €
Timing-belt kit~650 €
Tyres (set of 4)~400 €

* Indicative estimates for parts and labour.

Frequently asked questions about Buick LaCrosse II

What are the common problems on the LaCrosse II?▾
LaCrosse II owners should especially watch: 3.6 V6 timing chains: strictly monitor cold-start rattle and change engine oil at shortened intervals. Direct-injection intake valve coking: inspect for rough cold idle and hesitation caused by carbon deposits. Garajo includes these watch points so you can act early.
When should you change the timing belt on a LaCrosse II?▾
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 II?▾
Garajo offers a free digital service book, always up to date, with reminders and a detailed history for your Buick LaCrosse II.
How much does it cost to service a Buick LaCrosse II?▾
The service budget for a Buick LaCrosse II sits slightly above the market average (+15%). Allow about 350 € for a full service, for example. Garajo estimates your budget by powertrain and tracks what you actually spend, for free.
Which Buick LaCrosse II powertrain is best for town use?▾
This model is only available as petrol/diesel. Fuel mix: 8 petrol versions. In town, prefer the most economical, well-serviced petrol/diesel version.
Which Buick LaCrosse II powertrain should you choose if you mostly drive on the motorway?▾
This model is only available as petrol/diesel. Fuel mix: 8 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 II?

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
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