YAOPEI O2 Oxygen Sensor Kit for Chevrolet & GMC 1996–2002 — 4-Piece Set, OEM Fit Stainless Housing

YAOPEI's four-piece O2 oxygen sensor kit replaces worn upstream and downstream sensors on select Chevrolet, GMC and Cadillac V8/V6 models from 1996–2002.

This replacement set includes two 234-4012 and two 234-4018 sensors (upstream and downstream) engineered to match factory fit and wiring for many Chevy Silverado, Sierra, Tahoe, Suburban, Yukon, Express/Savana vans, Avalanche and select Cadillac Escalade models. Each sensor is built with a corrosion-resistant stainless housing and anti-oxidant coating to withstand heat and road conditions while restoring proper oxygen signal feedback to your engine control unit. Before ordering, check the vehicle year/make/model and plug style against the product photos and interchange numbers listed to ensure correct compatibility.

Will these sensors fit my Chevrolet or GMC truck?

These sensors are specifically selected for late-1990s and early-2000s GM light trucks and full-size SUVs. Fitment covers many C/K series, Silverado/Sierra, Tahoe, Suburban, Yukon, Avalanche, Express/Savana vans and a few Escalade years. Confirm fit by matching your vehicle year and the interchange numbers included below.

• Compatible models: Silverado/Sierra 1500 & 2500, Tahoe, Suburban, Yukon, Avalanche, Express/Savana vans, Escalade (selected years).
• Covered years: primarily 1996–2002 depending on model and position.
• Interchange numbers: 9617178, 234-4012, SG454, SG236, 13474, 234-4018.

How are these O2 sensors constructed and what benefits does that give?

Each sensor uses a dual laser-welded stainless-steel housing and an anti-oxidant coating to resist oxidation and high temperatures experienced near the exhaust. Those construction choices improve durability, help maintain accurate response time, and extend service life compared with untreated components.

• Dual laser welds seal the unit for improved longevity and water resistance.
• Anti-oxidant coating reduces corrosion and preserves sensor response speed.
• Stainless housing stands up to road debris, heat, and harsh environments.

What comes in the package and how difficult is installation?

The kit ships with four sensors: two 234-4018 and two 234-4012 units—arranged as two upstream (front) and two downstream (rear) sensors. Installation is straight bolt-on for compatible vehicles; no special modifications are required, though correct connector matching is essential.

• Package: 4 PCS oxygen sensors (2 × 234-4018, 2 × 234-4012), labeled for front and rear positions.
• Positioning: 2 upstream (pre-catalytic) and 2 downstream (post-catalytic) sensors included.
• Installation: bolt-on replacement; verify plug shape and wiring before installation.

Which checks should I do before ordering to avoid a wrong purchase?

Because GM used different sensor part numbers and connector types across model years, comparing the supplied pictures, plug shape and interchange numbers to your vehicle is crucial. If you are uncertain, contact the seller with your VIN or model details to confirm fitment.

• Compare the plug and sensor body in product photos to your current sensor.
• Cross-check your vehicle year/make/model with the listed fitment table.
• Use interchange numbers (234-4012, 234-4018, 9617178, SG454, SG236, 13474) for parts matching.

Who is this for: This YAOPEI four-piece oxygen sensor kit is aimed at DIY mechanics and professional technicians working on GM full-size trucks, vans and SUVs from the 1996–2002 era who need a cost-effective direct-replacement set. It's also useful for owners refurbishing older vehicles where upstream and downstream sensors are due for simultaneous replacement. Always verify plug compatibility and part numbers before installing to ensure a proper fit and reliable operation.