higherbro Oxygen O2 Sensor Kit for Chevy Silverado 1500 2008-2013 – 4-Pack (2 Upstream, 2 Downstream) for Improved Fuel Economy

If your check engine light, fuel economy, or emissions performance points to worn oxygen sensors, this higherbro four-pack gives you the full set needed for many Chevrolet, GMC, Cadillac, Pontiac and Saturn vehicles from the 2008–2014 model years. Each sensor uses an aluminum-oxide sensing element and an analog voltage output to communicate oxygen content to the engine control module. The package includes two sensors designed for upstream (pre-catalyst) positions and two for downstream (post-catalyst) positions, plus a flange-style mounting for straightforward installation.

How will these sensors affect my truck's running condition?

Replacing failing O2 sensors helps the engine control module get correct exhaust oxygen readings so it can adjust fuel delivery and timing. That leads to smoother idling, reduced misfires and more consistent throttle response when sensors are functioning correctly. These sensors are designed to match the common electrical and mechanical specs of the original equipment on supported GM engines.

• Measures oxygen range from 0 to 20.5% for accurate feedback.
• Analog voltage output compatible with factory ECU inputs.
• Flange mount for a secure, OEM-like fit.

Which vehicles and engine types are compatible with this four-pack?

This set fits a range of V6 and V8 GM models built between 2008 and 2014, excluding vehicles equipped with the 4.3L engine. Always verify fitment using the "Select Your Vehicle" tool on the product page before ordering to confirm model year, engine size and notes match your vehicle.

• Covers Chevrolet Avalanche, Silverado 1500, Suburban 1500, Tahoe and select others.
• Also fits Cadillac Escalade/ESV/EXT, GMC Sierra/Yukon/Yukon XL models within listed years.
• Includes select Pontiac and Saturn models noted in the fitment guide.

How difficult is installation and what hardware is included?

Each kit contains four sensors—two upstream and two downstream—ready for direct replacement of the factory sensors in compatible vehicles. The flange-style connection simplifies mounting, but basic tools and an O2 sensor socket or wrench are typically required. If you are unsure, a professional mechanic or experienced DIYer can complete the swap in a short shop session.

• 4 pieces: 2 upstream (pre-catalyst) and 2 downstream (post-catalyst).
• Flange mount design for straightforward installation.
• Designed for 12V systems and standard vehicle wiring harnesses.

What warranty and quality details come with the purchase?

The higherbro sensors include a one-year quality guarantee covering manufacturing defects. They are constructed with an aluminum-oxide sensing element and rated to operate within the typical oxygen measurement range for gasoline engines. Keep original purchase documentation for warranty support.

• One-year quality guarantee against manufacturing defects.
• Aluminum-oxide sensing element for reliable signal generation.
• Specified measurement range: 0–20.5% oxygen concentration.

Who is this for: This 4x oxygen sensor set is aimed at owners or technicians servicing 2008–2013 Chevrolet Silverado 1500 and many other GM trucks and SUVs within the listed years and engine sizes (except 4.3L). Choose this kit if you need a complete upstream/downstream replacement set to restore accurate O2 sensing, ensure correct ECU feedback, and maintain emissions and fuel performance on compatible vehicles. Remember to confirm your exact make, model, year and engine through the "Select Your Vehicle" option before purchase.