Leader 4-Piece O2 Oxygen Sensor Set For 2003-2006 Chevy Silverado 1500 4.3L - Upstream & Downstream

If your 2003-2006 Chevy Silverado 1500 with the 4.3L V6 is throwing O2 sensor codes, this set has you covered.

It's four sensors from Leader—both upstream and downstream, front and rear.

Complete replacement set.\n\nThey're heated, narrow-band, direct-fit sensors.

4-wire, blade terminal.

Screw-in threaded mount.

Part numbers cross with 234-4407 and 234-4647.

Metal housing.

They're specific to this truck, not universal.

1-year warranty.

If you've got a check engine light related to fuel trim or catalytic converter efficiency, these should sort it out.

Straightforward swap.