2010 Buick LaCrosse Catalytic Converters

Genuine GM catalytic converters for the 2010 Buick LaCrosse, at wholesale prices. Converters are emissions parts, and the substrate loading has to match what the ECM expects from the downstream oxygen sensor. Epsilon II from 2010 to 2016 and a lighter redesign from 2017 to 2019.

How you know

A P0420 code, rattling from underneath, or a failed emissions test. On a full-size car, trim and package content split these part numbers in ways a diagram will not show.

What sets these apart

• Returns without a fight. We would rather fix a catalytic converters order than argue about it.
• Covered by GM. On catalytic converters that coverage is worth more than the price gap.
• Real wholesale. The same catalytic converters your dealer sells, at a fraction over our cost.
• OEM, not lookalike. With catalytic converters the difference shows up on installation day, not in the photo.

Confirming fitment

Genuine GM parts carry the factory part number, so supersessions are documented rather than guessed at. Run your VIN first. One vehicle can list several nearly identical parts and only one is correct. Because we ship centrally, a heavy part costs less delivered here than from a coastal seller.