Buick shares its platforms with other GM brands — LaCrosse and Lucerne with Impala and DTS, Enclave with Traverse and Acadia, Encore with Chevrolet Trax — but Buick trims add their own lighting, trim and suspension packages. A large share of the Buick parts we quote are for 1995–2011 LeSabre, Park Avenue, Century and LaCrosse with the 3.8-liter V6, plus classics from the 1960s and 1970s, so year and engine drive the fitment.
What’s different about Buick batteries and electrical parts
- The 3.8-liter V6 cars (LeSabre, Park Avenue, Century, LaCrosse through 2009) are known for failing ignition switches, window switches, crank sensors and power window regulators; the LaCrosse hub bearings carry the wheel speed sensor, so a bad sensor means a bearing.
- Alternators on the 3.8 V6 and the 3.6 V6 differ by year and output, and LaCrosse and Enclave from 2010 onward use a regulated-voltage charging system with a battery current sensor that should be relearned after a battery change.
- Encore and Regal with the 2.0 turbo or 1.4 turbo use start-stop AGM batteries on later years; the 2012–2016 Regal and LaCrosse eAssist hybrid carries a separate lithium battery pack in the trunk.
Buick LaCrosse 3.8 ignition switch and lock cylinder, 2005–2009
The 2005–2009 LaCrosse with the 3800 V6 has a well-known ignition switch problem: the car cranks intermittently or not at all, accessories cut out while driving, or the security light comes on and the engine will not start. The electrical switch and the key lock cylinder are two separate parts, and owners are often sold the wrong one.
- The ignition switch is the electrical part behind the lock cylinder on the steering column. Intermittent no-crank with a key that turns freely points to the switch.
- A key that will not turn, or turns with difficulty, points to the lock cylinder, which comes with new keys.
- After either part, the Passlock security system needs the ten-minute relearn procedure before the car will start. We walk you through it by phone.
Describe the symptom and we will tell you which part it is before you buy. Both are stocked for the 3.8 LaCrosse and its Allure twin.
Read first: Does a used module need programming?
Buick models we supply batteries and electrical parts for
- Buick LaCrosse
- Buick Enclave
- Buick LeSabre
- Buick Encore
- Buick Park Avenue
- Buick Regal
- Buick Lucerne
- Buick Century
- Buick Electra
Don’t see yours? We quote batteries and electrical parts for every Buick sold in the US — call with your VIN.
What we need to quote your Buick batteries and electrical parts
- Engine size and whether the vehicle has auto start-stop
- Battery group size or a photo of the current battery label
- For alternators: the amperage rating stamped on the old unit if you have it
- The symptom — slow crank, warning light, dead overnight — to rule out a simple drain
Buick batteries and electrical parts FAQ
LaCrosse, Enclave, LeSabre, Encore, Park Avenue, Regal, Lucerne, Century, Electra are the Buick models we quote most often, but we source batteries and electrical parts for any Buick sold in the United States. If your model is not listed, call with the VIN and a specialist will check.
We decode your VIN and confirm engine size and whether the vehicle has auto start-stop; battery group size or a photo of the current battery label; for alternators: the amperage rating stamped on the old unit if you have it; the symptom — slow crank, warning light, dead overnight — to rule out a simple drain. Nothing ships until a specialist has verified the part number against your exact build.
Yes — to all 50 states. Orders are processed within 1–2 business days and ship via UPS, FedEx, or USPS, typically arriving in 3–5 business days. Call +1 (888) 908-0506 for a quote that includes shipping to your ZIP code.