Denso 234-3011 Oxygen Sensor - Upstream

Denso OE Style Oxygen Sensor 234-3011

Denso 234-3011 is an OE Style heated oxygen sensor built for exact replacement and first-time fit. It is designed for upstream applications on select Chevrolet, GMC, Buick, Oldsmobile, and Pontiac vehicles, including 1995 Chevrolet C1500, 1995 GMC Yukon, and 1993 Buick LeSabre.

Key Features

• Heated oxygen sensor with a specific-fit design for direct replacement
• 3-wire configuration with female connector and threaded mounting
• Wiring harness length: 13.98 in.
• Thread diameter: 0.708 in.
• Built to OE standards for accurate sensor response and consistent engine management
• Uses Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination

OE Style Design and Fitment

The OE Style line from Denso focuses on direct-fit replacement parts that match original equipment dimensions and connector layout. That matters when replacing an upstream oxygen sensor on vehicles such as the Chevrolet Astro, GMC Safari, or Pontiac Bonneville, where proper sensor placement and signal accuracy affect fuel control and emissions performance. Denso 234-3011 is engineered for the listed upstream applications and cross-references ACDelco AFS76 and Bosch 15700 for the same application.

What This Oxygen Sensor Helps Address

• Check engine light concerns related to oxygen sensor performance
• Incorrect air-fuel mixture readings from a worn upstream sensor
• Reduced fuel economy caused by slow or inaccurate sensor feedback
• Emissions test failures tied to sensor response issues
• Rough idle or drivability problems linked to faulty exhaust oxygen measurement

Installation Notes and Tips

Verify the connector style, wire count, thread diameter, and upstream location before installation. This sensor uses a threaded mounting type and a female connector, so matching the original harness and exhaust bung is important for proper installation. Confirm vehicle-specific fitment for the exact year, make, model, and engine configuration before ordering Denso 234-3011.

• Fits 1995-1996 Chevrolet G30, upstream
• Fits 1995 Chevrolet Astro, upstream
• Fits 1995 Chevrolet C1500, upstream
• Fits 1995 Chevrolet C1500 Suburban, upstream
• Fits 1995 Chevrolet C2500, upstream
• Fits 1995 Chevrolet C2500 Suburban, upstream
• Fits 1995 Chevrolet C3500, upstream
• Fits 1995 Chevrolet G10, upstream
• Fits 1995 Chevrolet G20, upstream
• Fits 1995 Chevrolet K1500, upstream
• Fits 1995 Chevrolet K1500 Suburban, upstream
• Fits 1995 Chevrolet K2500, upstream
• Fits 1995 Chevrolet K2500 Suburban, upstream
• Fits 1995 Chevrolet K3500, upstream
• Fits 1995 Chevrolet Tahoe, upstream
• Fits 1995 GMC C1500, upstream
• Fits 1995 GMC C1500 Suburban, upstream
• Fits 1995 GMC C2500, upstream
• Fits 1995 GMC C2500 Suburban, upstream
• Fits 1995 GMC C3500, upstream
• Fits 1995 GMC G1500, upstream
• Fits 1995 GMC G2500, upstream
• Fits 1995 GMC G3500, upstream
• Fits 1995 GMC K1500, upstream
• Fits 1995 GMC K1500 Suburban, upstream
• Fits 1995 GMC K2500, upstream
• Fits 1995 GMC K2500 Suburban, upstream
• Fits 1995 GMC K3500, upstream
• Fits 1995 GMC Safari, upstream
• Fits 1995 GMC Yukon, upstream
• Fits 1993 Buick LeSabre, upstream
• Fits 1993 Buick Park Avenue, upstream
• Fits 1993 Buick Regal, upstream
• Fits 1993 Chevrolet Lumina APV, upstream
• Fits 1993 Oldsmobile 88, upstream
• Fits 1993 Oldsmobile 98, upstream
• Fits 1993 Oldsmobile Silhouette, upstream
• Fits 1993 Pontiac Bonneville, upstream
• Fits 1993 Pontiac Trans Sport, upstream

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for precise replacement performance. The sensor’s protective trap layer is intended to help preserve the ceramic element from contamination, supporting long service life and stable engine control on the listed Chevrolet, GMC, Buick, Oldsmobile, and Pontiac applications.