Buy OEM Hummer Part # 12596327. Oxygen Sensor. 2.8 liter, front. 2nd design. 2nd design, 3.6 liter. 3.6 liter, front. 3.6 liter, w/o direct injectio. CTS; ENGINE CONTROL

Ft oxygen sensor. SENSOR, Heated OXYGEN (O2) (POSN 1).
2nd Design. Oxygen Sensor.

Oxygen Sensor

Fits CTS, SRX, STS

2.8 liter, front. 2nd design. 2nd design, 3.6 liter. 3.6 liter, front. 3.6 liter, w/o direct injectio. CTS; ENGINE CONTROL; 2.8L; 2nd Design. CTS; ENGINE CONTROL; 3.6L; 2nd Design. Front, 3.6 liter. STS, STS-V; 3.6L; Front. STS, STS-V; 4.6L; Front.
Oxygen Sensor - Repair or Replace
A failed Oxygen Sensor will often have no noticeable symptoms beyond a check engine light, but it does cause your Hummer to operate inefficiently and produce higher emissions. Our technicians have access to manufacturer-approved repair processes and Hummer genuine parts.