BLPextrm O2 Sensor Kit 4PCS for 2006–07 Chevy GMC Cadillac — Upstream & Downstream, Direct-Fit

BLPextrm 4PCS Oxygen O2 Sensor kit replaces upstream and downstream sensors for select 2006–2007 Chevrolet, GMC and 2007 Cadillac engines to restore accurate air-fuel monitoring.

This complete set of four O2 sensors is engineered as a direct-fit replacement for upstream (pre-catalytic) and downstream (post-catalytic) locations on many Chevy, GMC and Cadillac V6 and V8 models from 2006–2007. Built from high-temperature materials and designed to match factory electrical and thread specifications, these sensors provide reliable feedback to your engine control module so the fuel trim and emissions systems operate as intended. Before purchase, verify fitment by comparing your vehicle year, engine displacement and original part numbers against the list of compatible models and replacement numbers.

Which vehicles and engines will these BLPextrm sensors fit?

These sensors cover a range of GM vehicles from model years 2006–2007 with 4.3L, 4.8L, 5.3L, 6.0L and 6.2L engines. They are intended for both upstream and downstream positions across Silverado, Sierra, Avalanche, Suburban, Tahoe, Yukon, Yukon XL and Cadillac Escalade variants listed in the product application. Confirm your engine size and year to ensure compatibility.

• Chevy Silverado/Sierra 1500 (4.3L, 4.8L, 5.3L, Classic body styles noted)
• Chevy Avalanche/Suburban/Tahoe with specified 2006–2007 engine options
• GMC Sierra/Yukon/Yukon XL with listed engine displacements
• Cadillac Escalade (6.2L) 2007 models

How do these sensors improve engine performance and emissions?

Oxygen sensors measure exhaust oxygen content and send voltage signals to the engine control unit to help regulate fuel delivery. Replacing faulty sensors stabilizes idle, reduces misfires and helps maintain correct fuel economy and emission outputs without altering engine hardware. These BLPextrm units are constructed to withstand high exhaust temperatures for consistent readings over time.

• Faster response time improves air-fuel ratio adjustments
• High-temperature materials rated up to 650°C for durability
• Restores accurate downstream catalytic converter monitoring
• Addresses symptoms like rough idle, stalling and poor acceleration

What replacement part numbers and compatibility should I check?

The kit replaces a wide range of OEM and aftermarket part numbers; consult the provided replacement list and cross-reference with your existing sensor’s number and connector type. Always match plug style, thread pitch and electrical pins to avoid fitment issues. If in doubt, remove the old sensor and compare it with the numbers shown in the product description.

• Includes cross-reference numbers such as 234-4018, 25161130, 25312196 and others
• Verify your vehicle’s original sensor number before ordering
• Check connector type and wiring harness compatibility for plug-and-play fit

What support and warranty-like help does BLPextrm offer if sensors underperform?

If you encounter issues with sensor operation, BLPextrm requests customers to contact support with details so the team can troubleshoot or arrange replacements where appropriate. Prompt communication helps pin down installation or compatibility problems versus product defects. The seller emphasizes customer satisfaction and a commitment to resolving sensor-related concerns.

• Contact support with vehicle info and symptoms for faster resolution
• Provide part numbers and purchase details when emailing for help
• Expect guidance on troubleshooting, replacement or return steps

Who is this for: This 4-piece BLPextrm oxygen sensor kit is designed for DIY mechanics, independent technicians and fleet maintainers working on mid-2000s GM trucks and SUVs who need a direct-fit, temperature-resistant replacement for both upstream and downstream O2 sensors. It’s suited to anyone replacing worn or failed sensors to restore proper emissions monitoring and engine management—provided you confirm engine size and part number compatibility before ordering.