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2018 Buick LaCrosse Gaining Mild Hybrid, 9 Speed Auto

2018 Buick LaCrosse Gaining Mild Hybrid, 9 Speed Auto

Buick LaCrosse buyers will be gaining an additional powertrain option for 2018. According to General Motors own fleet order guide, the 2018 model year will bring back the company’s mild hybrid system to the LaCrosse nameplate. Additionally, the car’s V-6 model will again an additional gear.

The order guide states that the LaCrosse will offer the 2.5-liter four-cylinder paired with a 20 kW parallel hybrid system and a six-speed automatic transmission. Buyers can switch to this powertrain on three different trim levels of the LaCrosse, while the 309 horsepower 3.6-liter V-6 will remain as the standard engine on every LaCrosse trim level.

Although the order guide is not explicitly calling it eAssist, this appears to be the next-generation version of the previous mild hybrid system Buick utilized on the last-generation LaCrosse. Internally the system is referred to as the Belt Alternator Start (BAS) system. In the former car the system utilized GM’s 2.4-liter four-cylinder and a 15 kW electric motor to boost fuel efficiency in the large sedan.

Given that GM has phased out the old 2.4-liter ECOTEC four-cylinder, it comes as little surprise the company has apparently switched to the newer 2.5-liter. It also appears that the bigger engine has been paired with an electric motor that’s 5 kW beefier than the previous one.

It’s too early to tell what impact the system will have on fuel economy figures. The 2016 LaCrosse eAssist wore EPA ratings of 25 mpg city and 36 mpg highway. Given the new LaCrosse is slightly lighter and the electric motor is larger on this version, perhaps the fuel economy figures will be enhanced on the 2018 car.

The order guide does state that the 2.5-liter option will not be available at start of production, which means the mild hybrid model will launch later in the 2018 model year. It is also worth noting that the order guide is corroborating with GM’s 2018 VIN card, which is also showing the 2.5-liter engine in the 2018 LaCrosse.

In addition to the hybrid powertrain, Buick is also swapping out the V-6’s eight-speed automatic for GM’s new nine-speed unit.

 





 

About Nick Saporito

AutoVerdict Senior Editor Nick Saporito began writing about cars at age 13. Nick ran a couple of automotive enthusiast sites for several years, before taking some time off to focus on his career and education. By day he's a marketing executive in the telecom world and by night he hangs out here at AV. You'll find him focusing on tech, design and the industry's future.
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 Latest Forum Messages
  1. 2b2
    imho, they should NEVER have used the nomenclature "MILD hybrid"

    ...even if it is

    member12
    What is the difference between a mild hybrid and the auto start/stop system that is already standard on the Buick LaCrosse?

    Can the car move at all under electric propulsion? Because if not, they shouldn't bother.


    afaik - & might be a diff mfg -

    it involves a more powerful alternator(starter) that can be fed juice while running to alleviate power requirements from the petrol engine

    correction happily accepted
    member12
    What is the difference between a mild hybrid and the auto start/stop system that is already standard on the Buick LaCrosse?

    Can the car move at all under electric propulsion? Because if not, they shouldn't bother.
    germeezy1
    Buick, and the Lacrosse should have always been marketed as a Lexus ES competitor. They need a true hybrid variant, and a turbocharged Malibu hybrid system variant would work masterfully in this class.
    JBsC6
    Mild hybrids are losing market share. I'm not a fan of GM s plan with the mild hybrid lacrosse.

    Sedan market is collasping especially the large sedan market.

    Just run this LaCrosse admittedly a pretty sedan
    FenwickHockey65
    The mild hybrid system in the Silverado/Sierra costs less than some of the factory assist steps available.

    At what point does GM just bite the bullet and make it standard equipment?
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