Vehicle

Buick LaCrosse

The large saloon above the Regal, sharing the same Epsilon platform family and engines. Later versions carry a mild-hybrid system, which means a low-voltage complaint has a second charging path to check before the alternator.

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Buick LaCrosse — IFCAR · Public domain (external)

Generations

First generation 2004–2009

The original; naturally aspirated V6 throughout.
- 4T60-E / 4T65-E 4-speed automatic
Body styles

Sedan

Platform

GM W
Engines
3.6 V6 — LY7 · petrol · 179 kW (240 hp) · 305 Nm (225 lb-ft)

3.8 V6 — L26 · petrol

5.3 V8 — LS4 · petrol · 224 kW (300 hp) · 438 Nm (323 lb-ft) · Super

2.4 — LE5 · petrol · 225 Nm (166 lb-ft) · China

3.0 V6 — petrol · China
Transmissions

4-speed 4T65-E automatic · 4-speed 4T65E-HD automatic · 6-speed automatic

Drivetrain

Front-wheel drive
Second generation 2009–2016

Epsilon II platform; the eAssist mild hybrid arrives and adds a second charging path to a low-voltage complaint.
- 6T70 6-speed automatic
Body styles

Sedan

Platform

GM Epsilon II
Engines
2.4 Ecotec — LAF · petrol

3.0 V6 — LF1 · petrol · 190 kW (255 hp) · 294 Nm (217 lb-ft)

3.6 V6 — LFX · petrol · 226 kW (303 hp) · 358 Nm (264 lb-ft)

2.4 eAssist — LUK · mild hybrid · 136 kW (182 hp) · 233 Nm (172 lb-ft)

2.0 turbo — petrol · China

2.4 turbo — LE5 · petrol · China
Transmissions

6-speed GM 6T40 automatic · 6-speed GM 6T45 automatic · 6-speed GM 6T70 automatic

Drivetrain

Front-wheel drive · Four-wheel drive
Third generation 2016–2019

Lighter, with a nine-speed automatic.
- High Feature V6 (LFX / LY7 / LF1)
- SGE (1.0–1.5 turbo)
Body styles

Sedan

Platform

GM P2XX
Engines
3.6 V6 — LGX · petrol · 231 kW (310 hp) · 382 Nm (282 lb-ft)

2.5 eAssist — mild hybrid

1.3 turbo — petrol

1.5 turbo — 552T · petrol · 20T, 2016–18

1.8 — hybrid · 30H, 2016–18

2.0 turbo — 652T · petrol · 28T, 2016–19
Transmissions

6-speed 6T40 MNH automatic · 8-speed Aisin AF50-8 automatic · 9-speed 9T60 (M3G) automatic · CVT · 7-speed dual clutch · 9-speed 9T50 Hydramatic automatic

Drivetrain

Front-wheel drive · Four-wheel drive

Information, not instruction

CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.

Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.

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