GM Emission Reduction Fluid Front Inlet Pipe

Name: GM Emission Reduction Fluid Front Inlet Pipe 84389464
Brand: GM (General Motors)
SKU: 84389464
Price: 304.91 USD
Availability: InStock

Genuine GM · Part #84389464 · Engine / Diesel Emissions

Genuine GM diesel exhaust fluid (DEF) front inlet pipe, part of the diesel emission-reduction system.

Part number

84389464

Fits

2017-2019 Chevrolet Silverado & GMC Sierra 2500 HD/3500 HD, 6.6L Duramax diesel; emission-reduction (DEF) front inlet pipe.

Replaces

23437487
84160732

AutoNation price

$304.91 (as of 2026-07-13)

Shop this part at AutoNation Parts →

Before you order

Confirm it fits with your VIN before buying.
The numbers under “Replaces” are older, superseded numbers — why GM part numbers change.

Details on this page were taken from the live AutoNation Parts listing (https://www.autonationparts.com/parts/gm-emission-reduction-fluid-front-inlet-pipe-assembly-84389464) on 2026-07-13. Prices and availability can change — confirm on the retailer’s page before purchase.