Denso 234-4019 Oxygen Sensor - Upstream
OE Quality 60-Day Returns
Denso
 OE Style

Denso 234-4019 Oxygen Sensor - Upstream

Brand Denso 234-4019
Position Upstream
Connector Gender Male
Mounting Type Threaded
Sensor Type Heated
Thread Diameter 0.708
Universal Or Specific Fit Specific
Wire Quantity 4
Wiring Harness Length 15.35
Product line OE Style
Fits Chevrolet and GMC · 203 vehicles

OE-style replacement. Precision-built for exact replacement and a first-time fit.

Heated sensor. Helps support faster operation and consistent performance.

Threaded mounting. A specific-fit oxygen sensor with a male connector and 4-wire design.

Cross-references ACDelco AFS93, ACDelco AFS136 and BorgWarner OS822 for the same application. See all 15.

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Denso OE Style Oxygen Sensor 234-4019

Denso 234-4019 is an OE Style heated oxygen sensor built for direct replacement on select Chevrolet and GMC applications. It is engineered for exact fit and reliable signal feedback, with coverage for upstream locations on vehicles such as the Chevrolet Express 1500 and GMC Savana 2500.

The OE Style line is focused on factory-style replacement fitment, making this sensor a practical choice for drivers servicing emissions and fuel-control systems on Chevrolet Express, GMC Savana, and related GM trucks and SUVs.

  • Heated oxygen sensor for upstream exhaust placement
  • Specific-fit design for direct replacement applications
  • 4-wire configuration with male connector
  • Threaded mounting type with 0.708 in. thread diameter
  • 15.35 in. wiring harness length
  • Built to OE standards for fit and signal consistency

OE-Style Replacement Details

Denso manufactures this oxygen sensor to strict OE standards, with precision-built components intended to match the original sensor form and function. The design includes Denso’s aluminum oxide trap layer, which helps protect the ceramic element from silicone and lead contamination for stable engine performance and long service life. This part number, 234-4019, is a direct-fit option for upstream sensor replacement on many 1996-2002 Chevrolet and GMC platforms, including Chevrolet Express 2500 and GMC Savana 3500 applications.

This part cross-references Bosch 13027 and NTK 21543 for the same application.

What This Sensor Helps Address

  • Check engine light caused by a failing upstream oxygen sensor
  • Rough idle or inconsistent air-fuel feedback
  • Reduced fuel economy from inaccurate exhaust readings
  • Slow sensor response during closed-loop operation
  • Emissions test failures related to oxygen sensor performance

Installation Notes and Tips

Verify the connector style, thread diameter, and upstream location before installation. This sensor uses a threaded mounting design and a 4-wire male connector, so matching the original harness and exhaust bung is important for proper fit. Confirm vehicle-specific coverage for your Chevrolet Express, GMC Savana, or other listed GM application before ordering.

Quality Assurance

Denso builds this OE Style oxygen sensor to factory-level standards and tests each component for replacement accuracy and first-time fit. The part number 234-4019 is designed to deliver the right fit for the listed applications, with contamination-resistant construction that supports dependable operation over time.

Related reading

This part fits 203 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelTransmissionPositionNotes
2002ChevroletExpress 1500—UpstreamGVW Over 8,500 Lbs.; OE Style
2002ChevroletExpress 2500—UpstreamGVW Over 8,500 Lbs.; OE Style
2002ChevroletExpress 3500—UpstreamGVW Over 8,500 Lbs.; OE Style
2002GMCSavana 1500—UpstreamGVW Over 8,500 Lbs.; OE Style
2002GMCSavana 2500—UpstreamGVW Over 8,500 Lbs.; OE Style
2002GMCSavana 3500—UpstreamGVW Over 8,500 Lbs.; OE Style
2001ChevroletExpress 1500—UpstreamGVW Over 8,500 Lbs.; OE Style
2001ChevroletExpress 2500—UpstreamGVW Over 8,500 Lbs.; OE Style
2001ChevroletExpress 3500—UpstreamGVW Over 8,500 Lbs.; OE Style
2001GMCSavana 1500—UpstreamGVW Over 8,500 Lbs.; OE Style
2001GMCSavana 2500—UpstreamGVW Over 8,500 Lbs.; OE Style
2001GMCSavana 3500—UpstreamGVW Over 8,500 Lbs.; OE Style
2000ChevroletC2500—UpstreamOE Style
2000ChevroletC3500—UpstreamOE Style
2000ChevroletExpress 1500—UpstreamGVW Over 8,500 Lbs.; OE Style
2000ChevroletExpress 2500—UpstreamGVW Over 8,500 Lbs.; OE Style
2000ChevroletExpress 3500—UpstreamOE Style
2000ChevroletExpress 3500—UpstreamGVW Over 8,500 Lbs.; OE Style
2000ChevroletK2500—UpstreamOE Style
2000ChevroletK3500—UpstreamOE Style
2000ChevroletSilverado 2500—UpstreamOE Style
2000ChevroletSuburban 2500—UpstreamOE Style
2000GMCC2500—UpstreamOE Style
2000GMCC3500—UpstreamOE Style
2000GMCK2500—UpstreamOE Style
2000GMCK3500—UpstreamOE Style
2000GMCSavana 1500—UpstreamGVW Over 8,500 Lbs.; OE Style
2000GMCSavana 2500—UpstreamGVW Over 8,500 Lbs.; OE Style
2000GMCSavana 3500—UpstreamOE Style
2000GMCSavana 3500—UpstreamGVW Over 8,500 Lbs.; OE Style
2000GMCSierra 2500—UpstreamOE Style
2000GMCYukon XL 2500—UpstreamOE Style
1999ChevroletC1500—UpstreamOE Style
1999ChevroletC1500 Suburban—UpstreamOE Style
1999ChevroletC2500—UpstreamOE Style
1999ChevroletC2500 Suburban—UpstreamOE Style
1999ChevroletC3500—UpstreamOE Style
1999ChevroletExpress 1500—UpstreamGVW Over 8,500 Lbs.; OE Style
1999ChevroletExpress 2500—UpstreamGVW Over 8,500 Lbs.; OE Style
1999ChevroletExpress 3500—UpstreamOE Style
1999ChevroletExpress 3500—UpstreamGVW Over 8,500 Lbs.; OE Style
1999ChevroletK1500—UpstreamOE Style
1999ChevroletK1500 Suburban—UpstreamOE Style
1999ChevroletK2500—UpstreamOE Style
1999ChevroletK2500 Suburban—UpstreamOE Style
1999ChevroletK3500—UpstreamOE Style
1999ChevroletP30—UpstreamOE Style
1999ChevroletSilverado 2500—UpstreamOE Style
1999ChevroletTahoe—UpstreamOE Style
1999GMCC1500—UpstreamOE Style
1999GMCC1500 Suburban—UpstreamOE Style
1999GMCC2500—UpstreamOE Style
1999GMCC2500 Suburban—UpstreamOE Style
1999GMCC3500—UpstreamOE Style
1999GMCK1500—UpstreamOE Style
1999GMCK1500 Suburban—UpstreamOE Style
1999GMCK2500—UpstreamOE Style
1999GMCK2500 Suburban—UpstreamOE Style
1999GMCK3500—UpstreamOE Style
1999GMCP3500—UpstreamOE Style
1999GMCSavana 1500—UpstreamGVW Over 8,500 Lbs.; OE Style
1999GMCSavana 2500—UpstreamGVW Over 8,500 Lbs.; OE Style
1999GMCSavana 3500—UpstreamOE Style
1999GMCSavana 3500—UpstreamGVW Over 8,500 Lbs.; OE Style
1999GMCSierra 2500—UpstreamOE Style
1998ChevroletC1500ManualUpstreamOE Style
1998ChevroletC1500—UpstreamOE Style
1998ChevroletC1500 Suburban—UpstreamOE Style
1998ChevroletC2500—UpstreamOE Style
1998ChevroletC2500ManualUpstreamOE Style
1998ChevroletC2500 Suburban—UpstreamOE Style
1998ChevroletC3500—UpstreamOE Style
1998ChevroletExpress 1500—UpstreamGVW Over 8,500 Lbs.; OE Style
1998ChevroletExpress 2500—UpstreamGVW Over 8,500 Lbs.; OE Style
1998ChevroletExpress 3500—UpstreamOE Style
1998ChevroletExpress 3500—UpstreamGVW Over 8,500 Lbs.; OE Style
1998ChevroletK1500ManualUpstreamOE Style
1998ChevroletK1500—UpstreamOE Style
1998ChevroletK1500 Suburban—UpstreamOE Style
1998ChevroletK2500—UpstreamOE Style
1998ChevroletK2500ManualUpstreamOE Style
1998ChevroletK2500 Suburban—UpstreamOE Style
1998ChevroletK3500—UpstreamOE Style
1998ChevroletP30—UpstreamOE Style
1998ChevroletTahoe—UpstreamOE Style
1998GMCC1500ManualUpstreamOE Style
1998GMCC1500—UpstreamOE Style
1998GMCC1500 Suburban—UpstreamOE Style
1998GMCC2500—UpstreamOE Style
1998GMCC2500ManualUpstreamOE Style
1998GMCC2500 Suburban—UpstreamOE Style
1998GMCC3500—UpstreamOE Style
1998GMCK1500ManualUpstreamOE Style
1998GMCK1500—UpstreamOE Style
1998GMCK1500 Suburban—UpstreamOE Style
1998GMCK2500—UpstreamOE Style
1998GMCK2500ManualUpstreamOE Style
1998GMCK2500 Suburban—UpstreamOE Style
1998GMCK3500—UpstreamOE Style
1998GMCP3500—UpstreamOE Style
1998GMCSavana 1500—UpstreamGVW Over 8,500 Lbs.; OE Style
1998GMCSavana 2500—UpstreamGVW Over 8,500 Lbs.; OE Style
1998GMCSavana 3500—UpstreamOE Style
1998GMCSavana 3500—UpstreamGVW Over 8,500 Lbs.; OE Style
1998GMCYukon—UpstreamOE Style
1997ChevroletC1500ManualUpstreamOE Style
1997ChevroletC1500—UpstreamOE Style
1997ChevroletC1500—UpstreamUpstream Sensor in Manifold; OE Style
1997ChevroletC1500 Suburban—UpstreamOE Style
1997ChevroletC2500—UpstreamOE Style
1997ChevroletC2500ManualUpstreamOE Style
1997ChevroletC2500ManualUpstreamLoc. Manifold; OE Style
1997ChevroletC2500 Suburban—UpstreamOE Style
1997ChevroletC3500—UpstreamOE Style
1997ChevroletExpress 1500—UpstreamGVW Over 8,500 Lbs.; OE Style
1997ChevroletExpress 2500—UpstreamGVW Over 8,500 Lbs.; OE Style
1997ChevroletExpress 3500—UpstreamOE Style
1997ChevroletExpress 3500—UpstreamGVW Over 8,500 Lbs.; OE Style
1997ChevroletK1500ManualUpstreamOE Style
1997ChevroletK1500—UpstreamOE Style
1997ChevroletK1500—UpstreamUpstream Sensor in Manifold; OE Style
1997ChevroletK1500 Suburban—UpstreamOE Style
1997ChevroletK2500—UpstreamOE Style
1997ChevroletK2500ManualUpstreamOE Style
1997ChevroletK2500 Suburban—UpstreamOE Style
1997ChevroletK3500—UpstreamOE Style
1997ChevroletP30—UpstreamOE Style
1997ChevroletTahoe—UpstreamOE Style
1997GMCC1500ManualUpstreamOE Style
1997GMCC1500—UpstreamOE Style
1997GMCC1500ManualUpstreamLoc. Manifold; OE Style
1997GMCC1500 Suburban—UpstreamOE Style
1997GMCC2500—UpstreamOE Style
1997GMCC2500ManualUpstreamOE Style
1997GMCC2500ManualUpstreamLoc. Manifold; OE Style
1997GMCC2500 Suburban—UpstreamOE Style
1997GMCC3500—UpstreamOE Style
1997GMCK1500ManualUpstreamOE Style
1997GMCK1500—UpstreamOE Style
1997GMCK1500ManualUpstreamLoc. Manifold; OE Style
1997GMCK1500 Suburban—UpstreamOE Style
1997GMCK2500—UpstreamOE Style
1997GMCK2500ManualUpstreamOE Style
1997GMCK2500 Suburban—UpstreamOE Style
1997GMCK3500—UpstreamOE Style
1997GMCP3500—UpstreamOE Style
1997GMCSavana 1500—UpstreamGVW Over 8,500 Lbs.; OE Style
1997GMCSavana 2500—UpstreamGVW Over 8,500 Lbs.; OE Style
1997GMCSavana 3500—UpstreamOE Style
1997GMCSavana 3500—UpstreamGVW Over 8,500 Lbs.; OE Style
1997GMCYukon—UpstreamOE Style
1996ChevroletC1500ManualUpstreamOE Style
1996ChevroletC1500—UpstreamOE Style
1996ChevroletC1500ManualUpstreamLoc. Manifold; OE Style
1996ChevroletC1500 Suburban—UpstreamOE Style
1996ChevroletC2500—UpstreamOE Style
1996ChevroletC2500ManualUpstreamOE Style
1996ChevroletC2500—UpstreamLoc. Manifold; OE Style
1996ChevroletC2500 Suburban—UpstreamOE Style
1996ChevroletC3500—UpstreamOE Style
1996ChevroletExpress 1500—UpstreamGVW Over 8,500 Lbs.; OE Style
1996ChevroletExpress 2500—UpstreamGVW Over 8,500 Lbs.; OE Style
1996ChevroletExpress 3500—UpstreamOE Style
1996ChevroletExpress 3500—UpstreamGVW Over 8,500 Lbs.; OE Style
1996ChevroletG30—UpstreamOE Style
1996ChevroletG30—UpstreamGVW Over 8,500 Lbs.; OE Style
1996ChevroletK1500ManualUpstreamOE Style
1996ChevroletK1500—UpstreamOE Style
1996ChevroletK1500—UpstreamUpstream Sensor in Manifold; OE Style
1996ChevroletK1500 Suburban—UpstreamOE Style
1996ChevroletK2500—UpstreamOE Style
1996ChevroletK2500ManualUpstreamOE Style
1996ChevroletK2500 Suburban—UpstreamOE Style
1996ChevroletK3500—UpstreamOE Style
1996ChevroletP30—UpstreamOE Style
1996ChevroletTahoeManualUpstreamOE Style
1996ChevroletTahoe—UpstreamOE Style
1996GMCC1500ManualUpstreamOE Style
1996GMCC1500—UpstreamOE Style
1996GMCC1500ManualUpstreamLoc. Manifold; OE Style
1996GMCC1500 Suburban—UpstreamOE Style
1996GMCC2500—UpstreamOE Style
1996GMCC2500ManualUpstreamOE Style
1996GMCC2500ManualUpstreamLoc. Manifold; OE Style
1996GMCC2500 Suburban—UpstreamOE Style
1996GMCC3500—UpstreamOE Style
1996GMCG3500—UpstreamOE Style
1996GMCG3500—UpstreamGVW Over 8,500 Lbs.; OE Style
1996GMCK1500ManualUpstreamOE Style
1996GMCK1500—UpstreamOE Style
1996GMCK1500ManualUpstreamLoc. Manifold; OE Style
1996GMCK1500 Suburban—UpstreamOE Style
1996GMCK2500—UpstreamOE Style
1996GMCK2500ManualUpstreamOE Style
1996GMCK2500 Suburban—UpstreamOE Style
1996GMCK3500—UpstreamOE Style
1996GMCP3500—UpstreamOE Style
1996GMCSavana 1500—UpstreamGVW Over 8,500 Lbs.; OE Style
1996GMCSavana 2500—UpstreamGVW Over 8,500 Lbs.; OE Style
1996GMCSavana 3500—UpstreamOE Style
1996GMCSavana 3500—UpstreamGVW Over 8,500 Lbs.; OE Style
1996GMCYukonManualUpstreamOE Style
1996GMCYukon—UpstreamOE Style
Directly replaces or cross-references 15 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
ACDelco — AFS93ACDelco — AFS136BorgWarner — OS822BorgWarner — OS1074Bosch — 13027Delphi — ES20028GMC — 19178934GMC — 19178942GMC — 25312191GMC — 25315814NTK — 21543Standard Ignition — SG280Standard Ignition — SG478Walker Products — 250-24019Walker Products — 350-34259