Part Notes: Express 2500; 4.3L; Left Side; Downstream;Express 2500; 4.3L; Right Side; Downstream;Express 2500; 6.6L; Left Side; Downstream;Express 2500; 6.6L; Right Side; Downstream
Sensor Assembly-Heated Oxygen (Pre-Catalyst Bank 1 Se
Part Notes: Express 2500; 4.3L; Left Side; Upstream;Express 2500; 4.3L; Right Side; Upstream;Express 2500; 6.6L; Left Side; Upstream;Express 2500; 6.6L; Right Side; Upstream