2-Pack Upstream Oxygen O2 Sensor 234-4669 – Fits Cadillac Escalade, Chevy Silverado/Express/Suburban/Avalanche/Camaro/Corvette & More – Replaces 12572705 / 12611870

This is a 2-pack of upstream oxygen sensors – part number 234-4669 – that fit a huge range of GM vehicles.

We're talking Cadillac Escalade (6.

0L 2003-2006), Chevy Silverado 1500 (6.

0L 2004-2005), Avalanche 2500 (8.
1L 2003-2004), Camaro (6.
2L 2011-2015), Corvette (7.
0L 2013), Express vans (4.

3L 2008-2014), Trailblazer SS (6.
0L 2008-2009), Caprice PPV, SS sedan, and even commercial trucks like the LCF 3500.

It replaces OEM numbers 12572705, 12611870, 12617332, and also crosses with 234-4669.

These are heated sensors with a threaded mounting type and a 22-inch wire harness.
They mount upstream of the catalytic converter – position varies by vehicle, but it's the pre-cat sensor that measures exhaust oxygen before the catalyst.

These sensors use advanced sensing technology that meets OE standards – they accurately transmit oxygen data to the ECU, which helps maintain correct air-fuel ratio.
A good O2 sensor can improve fuel economy by 5-15% compared to a lazy or failed one.
If your check engine light is on with codes like P0135 or P0171, or your fuel mileage has tanked, these are likely the fix.

Two sensors per package.

Recommendation: replace O2 sensors every 50,000-60,000 miles for best performance.

Check your vehicle's specific sensor position and count before ordering – some models need more than two total.