Sangyue 4X Oxygen O2 Sensor Kit — 2008–2014 GM Fitment, Upstream & Downstream Sensors, OE-Style Connectors

The Sangyue 4X Oxygen O2 Sensor kit is a four-piece upstream and downstream replacement set engineered to restore accurate air-fuel readings for compatible 2008–2014 GM vehicles.

If your check engine light, fuel economy, or emissions diagnostics point to worn oxygen sensors, this Sangyue kit supplies both upstream and downstream sensors to match a wide range of Chevrolet, GMC, Cadillac, Pontiac and Saturn engines from model years 2008–2014. Each sensor is manufactured to meet OE-style fit and function so you can replace all four affected sensors at once, avoid mismatched readings and return your vehicle to reliable operation.

Which vehicles and engines does this Sangyue sensor kit fit?

This kit is intended for many GM full‑size trucks and SUVs and selected sedans within the 2008–2014 model years. Always verify fit by using the "Select Your Vehicle" selector with exact make, model, year and engine to ensure compatibility before ordering.

• Chevrolet Avalanche 2008–2013 — 5.3L, 6.0L
• Chevrolet Silverado 1500 2008–2013 — 4.8L, 5.3L, 6.0L, 6.2L
• Chevrolet Tahoe/Suburban 2008–2014 — 4.8L, 5.3L, 6.0L, 6.2L
• Cadillac Escalade (incl. ESV/EXT) 2008–2014 — 6.0L, 6.2L
• GMC Sierra/Yukon/Yukon XL 2008–2014 — multiple 4.8L–6.2L options; plus Yukon XL 2500 6.0L
• Pontiac 2008–2010 — selected 3.5L/3.9L; Saturn Aura 2008 3.5L

How does replacing all four oxygen sensors help performance and diagnostics?

Changing both upstream and downstream sensors at the same time prevents inconsistent sensor feedback and helps the engine control module recalibrate more quickly. New sensors return oxygen readings to expected ranges, improving fuel trim accuracy and reducing erroneous diagnostic trouble codes.

• Upstream sensors monitor exhaust oxygen for fuel‑trim control.
• Downstream sensors confirm catalytic converter efficiency.
• Replacing all four avoids mixed old/new sensor signals that confuse diagnostics.
• Can help resolve persistent O2 sensor-related check engine lights.

What should I expect from fitment, installation and warranty?

Sensors arrive as a four‑piece set (two upstream, two downstream) designed to match OEM mounting and connector styles for the listed GM vehicles. Installation typically requires basic tools and sensor sockets; depending on vehicle age and exhaust condition, anti-seize and some penetrating oil may be helpful. Sangyue backs this kit with a one-year unlimited-mileage quality guarantee.

• Includes four sensors: upstream + downstream for both banks.
• OE-style connectors for plug-and-play replacement on compatible models.
• One-year unlimited-mileage quality guarantee from Sangyue.
• Check vehicle selector (make, model, year, engine, notes) before purchase.

When should I replace oxygen sensors, and what symptoms indicate failure?

Oxygen sensors commonly degrade over time from heat and deposits; symptoms include decreased fuel economy, rough idling, failed emissions tests, or persistent OBD-II codes referencing O2 sensors or catalytic efficiency. Replacing worn sensors with a matched four-piece kit addresses both control and verification sensors to restore normal engine management behavior.

• Look for OBD-II codes like P0130–P0167 indicating O2 or circuit faults.
• Notable drop in MPG or rough running under load are signs.
• Failed emissions testing often traced to downstream sensor readings.
• Replacing all sensors reduces repeat diagnostics and ensures consistent readings.

Who is this for: The Sangyue 4X Oxygen O2 Sensor kit is for owners and mechanics of 2008–2014 GM full‑size trucks, SUVs and the few listed sedans who need a full-bank replacement of both upstream and downstream sensors. If you want OE‑style fit, a complete four‑sensor swap, and a one‑year guarantee, this kit is intended to make diagnosis simpler and installation straightforward—just confirm exact vehicle and engine fitment before ordering.