2010 GMC Sierra 3500 HD Catalytic Converters

Genuine GM catalytic converters for the 2010 GMC Sierra 3500 HD, at wholesale prices. Converters are emissions parts, and the substrate loading has to match what the ECM expects from the downstream oxygen sensor. One-ton heavy duty truck in single and dual rear wheel and chassis cab form.

When to replace

A P0420 code, rattling from underneath, or a failed emissions test. On a heavy duty pickup, cab configuration, drivetrain and box length all split this group, so the badge on the tailgate is not enough to order from.

The case for genuine GM

• Central shipping origin. Dallas keeps catalytic converters transit times short nationwide.
• Backed after the sale. If your catalytic converters does not work out, we make it right.
• Factory warranty. Genuine catalytic converters carry GM coverage aftermarket cannot match.

Avoiding the wrong part

GM revises parts mid-production. The OEM catalog tracks those revisions; cross-reference tables usually do not. Send us your VIN and we will confirm the exact part number before you order. Orders in by 3pm Central usually go out the same day, with shipping calculated at real cost.