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About the Buick LaCrosse / Allure eAssist Hybrid
The Buick LaCrosse eAssist Hybrid is a front-drive, front-engine, four-door, five- passenger sedan that was first introduced as a 2012 model and was updated in 2018 before being discontinued in 2019.
The LaCrosse was referred to as the Buick Allure in the Canadian market.
The LaCrosse and Allure Hybrids are considered “light-hybrids” with batteries coming in to give the engine a little boost under acceleration. MSRP on the Buick LaCrosse eAssist started at just under $30,000.
| 2012-2016 | 2018-2019 | |
| Horsepower | 182 hp 136 kW | 194 hp 145 kW |
| Torque | 172 lb-ft 233 N-m | 187 lb-ft 254 N-m |
| Battery | 24 cell Lithium Ion (Li-ion) | 24 cell Lithium Ion (Li-ion) |
| Gasoline Engine | 2.5 Liter Inline 4 (I4) | 2.5 Liter Inline 4 (I4) |
| Transmission | 6-Speed Automatic | 6-Speed Automatic |
| Electric Motors | 1x | 1x |
| MPG | 25 city / 36 highway | 25 city / 35 highway |
| Curb Weight | 3835 lbs 1739 kg | 3490 lbs 1583 kg |
| Fuel Tank Capacity | 15.7 gallons 59.4 liters | 15.8 gallons 60 liters |
Buick LaCrosse and Buick Allure Hybrid FAQ
What vehicles compete with the Buick LaCrosse and Buick Allure eAssist?
- Lexus HS Hybrid
- Lexus ES Hybrid
- Lincoln MKZ Hybrid
- Toyota Camry Hybrid
Buick LaCrosse / Allure eAssist Hybrid Batteries
Drive Battery | 12V Battery | Key Fob Battery
Drive Battery / Traction Battery
Drive Battery Specs
| Battery Type | Lithium Ion (Li-ion) |
| Battery Energy | 0.5 kWh |
| Battery Voltage | 115V |
| Battery Cell Count | 24 cells |
Drive Battery FAQs
How much do Buick LaCrosse eAssist Hybrid replacement drive batteries cost?
The price of a Buick LaCrosse eAssist Hybrid replacement battery is right around $1000 on the used market, not including labor, shipping, and taxes.
A refurbished high-voltage Buick Lacrosse eAssist battery retails from $1400 – $2000.
Where do I purchase a Buick LaCrosse eAssist Hybrid replacement drive battery?
The Dealership – Likely the best place to find a replacement drive battery for the Buick LaCrosse eAssist Hybrid is the dealer themselves.
eBay – One of the best places to find gently used batteries for the Buick LaCrosse eAssist Hybrid is eBay. Cars that have been wrecked or written off as a total loss can still have good batteries.
Check eBay for Buick LaCrosse eAssist Hybrid Drive Batteries
GM Parts Center – Our OEM parts are an exact fit for your GM car, truck, or SUV, and the price from GMPartsCenter.net is exactly what you deserve…The lowest total price, shipped direct to your door!
GMPartsCenter.net: 2018-2019 Buick Lacrosse Hybrid Batteries
Where is the drive battery located in the Buick Lacrosse Hybrid?
The drive battery in the Buick Lacrosse Hybrid is located in the trunk of the vehicle, behind an interior panel.
Drive Battery Charging
The Buick Lacrosse Hybrid recharges it’s batteries via regenerative braking. The system also cuts fuel to the engine during deceleration for additional charging as the motor-generator continues to rotate with the engine.
12V Battery
Buick LaCrosse eAssist Hybrid 12V Battery Location
The Buick LaCrosse eAssist Hybrid’s 12V battery is located in the trunk, behind an interior panel to the right.
Buick LaCrosse eAssist Hybrid 12V Battery Size
The Buick LaCrosse and Buick Allure eAssist Hybrids come with a 12v H6 AGM 730 CCA battery.
| Battery | Part # | Vendor |
| ACDelco | H6 AGM 88864541 | Amazon |
Buick LaCrosse eAssist Hybrid 12V Battery Replacement
Tools Required
Step-by-Step Instructions
Buick LaCrosse eAssist Hybrid 12V Battery Terminal Maintenance
Maintaining your Buick LaCrosse eAssist Hybrid 12V battery terminals is essential to ensuring a positive electrical contact. We recommend cleaning terminals and using a terminal protectant spray to prevent corrosion on your battery terminals.
CRC Battery Cleaner w/ Acid Detector will clean your battery terminals and surface, neutralizing acids and detecting leaks.
CRC Battery Terminal Protector Spray is designed to protect battery terminals from corrosion, a leading cause of hard starting and battery failure.
Buick LaCrosse eAssist Hybrid 12V Battery Testing, Maintenance and Repair
Battery testers are an inexpensive way to save yourself time in repairing your Buick LaCrosse eAssist Hybrid. A healthy 12V battery will read between 12.6 and 12.8 volts when tested. Anything lower, and you may want to consider replacing your batteries or checking the battery fluid levels.
How to charge the Buick LaCrosse eAssist Hybrid 12V battery
You can charge the Buick LaCrosse eAssist Hybrid with a normal 12V charger. If you remove the under-hood battery/fuse/relay box cover you’ll notice posts that are tied together electrically, to which you can clamp the positive (+) cable. You can then ground to the battery ground, or any convenient place nearby the box.
Buick LaCrosse eAssist Hybrid 12V Battery Chargers
| Battery Charger | Where to Purchase? |
| NOCO GENIUS 10 (12V & 6V) 10A Smart Car Battery Charger | Amazon |
| Battery Tender Junior 12V 750 mA Charger and Maintainer | Amazon |
| OptiMATE Lithium 4s 0.8A, TM-471 Battery Saving Charger & Maintainer | Amazon |
Jump starting a Buick LaCrosse eAssist Hybrid
There are convenient terminals to connect the positive and negative battery cables near the 12V battery under the hood, which will be marked accordingly. Hook the positive up to the vehicle with the dead battery first, then to the vehicle you are jumping from.
Remote Key Fob Battery
The Buick LaCrosse eAssist Hybrid key fob uses a CR2032 3V lithium battery.
Find CR2032 3V Lithium Batteries on Amazon
How to Reprogram and/or Add Remote Key Fobs to your Buick LaCrosse or Buick Allure
If you have purchased a new key fob, or are simply adding another, follow these easy instructions for pairing the key with your car:
Buick LaCrosse eAssist Hybrid Drivetrain
The Buick LaCrosse and Buick Allure eAssist Hybrids feature electric motors that provide a belt-driven boost to the vehicles under acceleration. This system is shared with the Saturn Aura Greenline.
Electric Motor-Generator
| Electric Motor Peak Output | 15 kW 20 hp |
| Electric Motor Output (electric assist) @ 1000 – 2000 RPM | 11 kW 15 hp |
| Electric Motor Torque (electric assist) @ 1000 RPM | 79 lb-ft 107 N-m |
Gasoline Engine
The gasoline engine in the Buick LaCrosse eAssist Hybrid is an Ecotec 2.5L direct-injection Inline 4 (I4). This engine features start/stop technology so you do not waste fuel while at idle. The engine also cuts off during deceleration so that power is transferred to the motor-generator to produce power for the battery. The engine and heads are both made from cast aluminum.
| Year Range | 2012-2016 | 2018-2019 |
| Gasoline Engine Power | 182 hp 136 kW | 194 hp 145 kW |
| Gasoline Engine Torque | 172 lb-ft 233 N-m | 187 lb-ft 254 N-m |
| Compression Ratio | 11.2:1 | 11.2:1 |
FAQs
What type and grade of gasoline does the Buick LaCrosse eAssist Hybrid use?
The Buick LaCrosse eAssist Hybrid owner’s manual recommends running regular unleaded gasoline, 89 octane or higher.
Transmission
The Buick LaCrosse eAssist Hybrid uses a Hydra-Matic 6T40 6-speed automatic transmission.
| Gear | Gear Ratio |
| First | 4.58:1 |
| Second | 2.96:1 |
| Third | 1.91:1 |
| Fourth | 1.45:1 |
| Fifth | 1:1 |
| Sixth | 0.75:1 |
| Reverse | 2.84:1 |
| Final Drive Ratio | 2.64:1 |
Join a Buick LaCrosse Community
BuickForums.com: Lacrosse / Allure – Discuss topics regarding the Buick LaCrosse and the Canadian Buick Allure.
AutomotiveForums.com: Buick Lacrosse / Allure – A forum dedicated to Buick LaCrosse enthusiasts, including the eAssist Hybrid
Reddit.com/r/Buick/ – A subreddit just for Buick enthusiasts.
Reddit.com/r/ElectricVehicles – This is the Reddit community for EV owners and enthusiasts. Discuss evolving technology, new entrants, charging infrastructure, government policy, and the ins and outs of EV ownership right here.
Buick LaCrosse eAssist Hybrid Reviews
