Delphi ES20000 Oxygen Sensor - Front, Rear or Rear Right
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Delphi

Delphi ES20000 Oxygen Sensor - Front, Rear or Rear Right

Brand Delphi ES20000
Position Front
Connector Shape Square
Overall Length 375.0
Package Contents Oxygen Sensor, Instruction Sheet
Position(s) Front, Rear, Rear Right. For the position specific to your vehicle, refer to the Application tab.
Sensor Type Heated
Thread Size 18 x 1.5 mm
Wire Quantity 4
Fits Buick, Cadillac, Chevrolet, Isuzu, and GMC · 232 vehicles

Heated sensor. Delivers faster operation for more responsive emissions monitoring.

Square connector. Simplifies installation with a straightforward electrical connection.

OE heritage. Built with 100 years of OE experience and supplier knowledge.

Cross-references BBB Industries 11173, BBB Industries 13474 and Carlson 15136 for the same application. See all 37.

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Delphi ES20000 Oxygen Sensor Overview

The Delphi ES20000 oxygen sensor is a heated, 4-wire replacement sensor built for front, rear, and rear right applications on a wide range of GM vehicles. It uses a square connector and 18 x 1.5 mm thread size, with OE-focused engineering backed by Delphi’s long history supplying original equipment to major automakers.

Compatible With Chevrolet Silverado, GMC Sierra, Cadillac Escalade, and related applications, this Delphi oxygen sensor supports accurate exhaust feedback for vehicles that need a direct-fit emission control replacement. The ES20000 is a practical choice when servicing a front or rear oxygen sensor location on select Buick, Cadillac, Chevrolet, GMC, and Isuzu models.

Key Features

  • Heated oxygen sensor design for faster operating temperature
  • 4-wire configuration for the listed applications
  • Square connector shape for OE-style electrical connection
  • 18 x 1.5 mm thread size
  • Overall length: 375.0
  • Package includes oxygen sensor and instruction sheet
  • Position coverage includes front, rear, and rear right applications

Detailed Description

Delphi ES20000 is an emission control oxygen sensor engineered for vehicles that require a heated, direct-fit replacement with OE-style fit and connector design. Delphi draws on more than 100 years of OE experience, and that heritage is reflected in the sensor’s construction and application coverage. This part cross-references DENSO Auto Parts (e.g., 234-4018, 234-4339) for the same application.

Use the ES20000 when servicing oxygen sensor locations on 1990-2011 Buick Lucerne, Cadillac DTS, Cadillac Escalade, Chevrolet Silverado 1500, Chevrolet Tahoe, GMC Sierra 1500, and other listed applications. The broad fitment includes front and rear positions, plus rear right coverage on select Silverado, Sierra, Yukon, and Suburban models.

What This Sensor Helps Address

  • Check engine light related to oxygen sensor performance
  • Incorrect exhaust oxygen readings affecting fuel control
  • Slow sensor response from a worn heated O2 sensor
  • Emissions test failures tied to sensor degradation
  • Driveability issues caused by inaccurate air-fuel feedback

Installation Notes and Tips

Confirm the exact position on your vehicle before ordering, since ES20000 is listed for front, rear, and rear right locations depending on application. Verify connector shape, wire count, thread size, and overall length against the original sensor before installation. For best results, compare the vehicle’s emission package and build notes, including Canada-built and California-emissions exceptions shown in the fitment data.

Fits 2006-2011 Buick Lucerne, front; 2006-2011 Cadillac DTS, front; 2006 Chevrolet SSR, front; 2006 Isuzu Ascender, front; and numerous Chevrolet and GMC rear applications including Silverado, Sierra, Tahoe, Yukon, and Escalade listings.

Quality Assurance

Delphi builds aftermarket parts using OE heritage and knowledge developed through supplier experience with major automakers. The ES20000 reflects that approach with application-specific fitment, heated sensor design, and OE-style connector and thread specifications for service replacement confidence.

Related reading

This part fits 232 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelPositionNotes
2011BuickLucerne—Front—
2011CadillacDTS—Front—
2010BuickLucerne—Front—
2010CadillacDTS—Front—
2009BuickLucerne—Front—
2009CadillacDTS—Front—
2008BuickLucerne—Front—
2008CadillacDTS—Front—
2007BuickLucerne—Front—
2007CadillacDTS—Front—
2006BuickLucerne—Front—
2006CadillacDTS—Front—
2006ChevroletSSR—Front—
2006IsuzuAscender—Front—
2002CadillacEscalade—Rear22in Length
2002CadillacEscalade—RearExcept Canada Built Vehicle; 22in Length
2002CadillacEscalade EXT—Rear22in Length
2002ChevroletAvalanche 1500Z71RearExcept Canada Built Vehicle; 22in Length
2002ChevroletAvalanche 1500On Road EditionRearExcept Canada Built Vehicle; 22in Length
2002ChevroletAvalanche 1500BaseRearExcept Canada Built Vehicle; 22in Length
2002ChevroletExpress 1500—Rear—
2002ChevroletExpress 2500—Rear—
2002ChevroletExpress 3500—Rear—
2002ChevroletSilverado 1500—RearExcept Canada Built Vehicle
2002ChevroletSilverado 1500—Rear—
2002ChevroletSuburban 1500—RearExcept Canada Built Vehicle
2002ChevroletTahoe—RearExcept Canada Built Vehicle
2002GMCSavana 1500—Rear—
2002GMCSavana 2500—Rear—
2002GMCSavana 3500—Rear—
2002GMCSierra 1500—Rear—
2002GMCSierra 1500—RearExcept Canada Built Vehicle
2002GMCYukon—Rear—
2002GMCYukon—RearExcept Canada Built Vehicle
2002GMCYukon XL 1500—Rear—
2002GMCYukon XL 1500—RearExcept Canada Built Vehicle
2001ChevroletExpress 1500—Rear—
2001ChevroletExpress 2500—Rear—
2001ChevroletExpress 3500—Rear—
2001ChevroletSilverado 1500—RearExcept Canada Built Vehicle
2001ChevroletSilverado 1500—Rear—
2001ChevroletSilverado 1500 HD—Rear Right—
2001ChevroletSilverado 2500—Rear Right—
2001ChevroletSilverado 2500 HD—Rear Right—
2001ChevroletSilverado 3500—Rear Right—
2001ChevroletSuburban 1500—RearExcept Canada Built Vehicle
2001ChevroletSuburban 2500—Rear Right—
2001ChevroletTahoe—RearExcept Canada Built Vehicle
2001GMCSavana 1500—Rear—
2001GMCSavana 2500—Rear—
2001GMCSavana 3500—Rear—
2001GMCSierra 1500—RearExcept Canada Built Vehicle
2001GMCSierra 1500—Rear—
2001GMCSierra 1500 HD—Rear Right—
2001GMCSierra 2500—Rear Right—
2001GMCSierra 2500 HD—Rear Right—
2001GMCSierra 3500—Rear Right—
2001GMCYukon—Rear Right—
2001GMCYukon—RearExcept Canada Built Vehicle
2001GMCYukon XL 1500—Rear Right—
2001GMCYukon XL 1500—RearExcept Canada Built Vehicle
2001GMCYukon XL 2500—Rear Right—
2000CadillacEscalade—Rear—
2000ChevroletC2500—Rear—
2000ChevroletC3500—Rearwithout California Emission System
2000ChevroletC3500—Rear—
2000ChevroletExpress 1500—Rear—
2000ChevroletExpress 2500—Rear—
2000ChevroletExpress 3500—Rear—
2000ChevroletK2500—Rearwithout California Emission System
2000ChevroletK2500—Rear—
2000ChevroletK3500—Rearwithout California Emission System
2000ChevroletK3500—Rear—
2000ChevroletSilverado 1500—RearExcept Canada Built Vehicle
2000ChevroletSilverado 1500—Rear—
2000ChevroletSilverado 2500—Rear Right—
2000ChevroletSilverado 2500—RearExcept Canada Built Vehicle
2000ChevroletSuburban 1500—RearExcept Canada Built Vehicle
2000ChevroletSuburban 2500—Rear Right—
2000ChevroletTahoe—Rear—
2000ChevroletTahoe—RearExcept Canada Built Vehicle
2000GMCC2500—Rear—
2000GMCC3500—Rearwithout California Emission System
2000GMCC3500—Rear—
2000GMCK2500—Rearwithout California Emission System
2000GMCK2500—Rear—
2000GMCK3500—Rearwithout California Emission System
2000GMCK3500—Rear—
2000GMCSavana 1500—Rear—
2000GMCSavana 2500—Rear—
2000GMCSavana 3500—Rear—
2000GMCSierra 1500—RearExcept Canada Built Vehicle
2000GMCSierra 1500—Rear—
2000GMCSierra 2500—Rear Right—
2000GMCSierra 2500—RearExcept Canada Built Vehicle
2000GMCYukon—Rear—
2000GMCYukon—RearExcept Canada Built Vehicle
2000GMCYukon XL 1500—RearExcept Canada Built Vehicle
2000GMCYukon XL 2500—Rear Right—
1999CadillacEscalade—Rear—
1999ChevroletC1500—Rear—
1999ChevroletC1500 SuburbanLTRear—
1999ChevroletC1500 Suburban—Rear—
1999ChevroletC2500—Rear—
1999ChevroletC2500 Suburban—Rear—
1999ChevroletC3500—Rear—
1999ChevroletExpress 1500—Rear—
1999ChevroletExpress 2500—Rear—
1999ChevroletExpress 3500—Rear—
1999ChevroletK1500—Rear—
1999ChevroletK1500 Suburban—Rear—
1999ChevroletK2500—Rear—
1999ChevroletK2500 Suburban—Rear—
1999ChevroletK3500—Rear—
1999ChevroletP30—Rear—
1999ChevroletSilverado 1500—Rear—
1999ChevroletSilverado 2500—Rear Right—
1999ChevroletSilverado 2500—Rear—
1999ChevroletTahoe—Rear—
1999GMCC1500—Rear—
1999GMCC1500 Suburban—Rear—
1999GMCC2500—Rear—
1999GMCC2500 Suburban—Rear—
1999GMCC3500—Rear—
1999GMCK1500—Rear—
1999GMCK1500 Suburban—Rear—
1999GMCK2500—Rear—
1999GMCK2500 Suburban—Rear—
1999GMCK3500—Rear—
1999GMCP3500—Rear—
1999GMCSavana 1500—Rear—
1999GMCSavana 2500—Rear—
1999GMCSavana 3500—Rear—
1999GMCSierra 1500—Rear—
1999GMCSierra 2500—Rear Right—
1999GMCSierra 2500—Rear—
1999GMCYukon—Rear—
1998ChevroletC1500—Rear—
1998ChevroletC1500 Suburban—Rear—
1998ChevroletC2500—Rear—
1998ChevroletC2500 Suburban—Rear—
1998ChevroletC3500—Rear—
1998ChevroletExpress 1500—Rear—
1998ChevroletExpress 2500—Rear—
1998ChevroletExpress 3500—Rear—
1998ChevroletK1500—Rear—
1998ChevroletK1500 Suburban—Rear—
1998ChevroletK2500—Rear—
1998ChevroletK2500 Suburban—Rear—
1998ChevroletK3500—Rear—
1998ChevroletP30—Rear—
1998ChevroletTahoe—Rear—
1998GMCC1500—Rear—
1998GMCC1500 Suburban—Rear—
1998GMCC2500—Rear—
1998GMCC2500 Suburban—Rear—
1998GMCC3500—Rear—
1998GMCK1500—Rear—
1998GMCK1500 Suburban—Rear—
1998GMCK2500—Rear—
1998GMCK2500 Suburban—Rear—
1998GMCK3500—Rear—
1998GMCP3500—Rear—
1998GMCSavana 1500—Rear—
1998GMCSavana 2500—Rear—
1998GMCSavana 3500—Rear—
1998GMCYukon—Rear—
1997ChevroletC1500—Rear22in Length
1997ChevroletC1500—Rear—
1997ChevroletC1500 Suburban—Rear—
1997ChevroletC2500—Rear—
1997ChevroletC2500 Suburban—Rear—
1997ChevroletC3500—Rear—
1997ChevroletExpress 1500—Rear—
1997ChevroletExpress 2500—Rear—
1997ChevroletExpress 3500—Rear—
1997ChevroletK1500—Rear—
1997ChevroletK1500 Suburban—Rear—
1997ChevroletK2500—Rear—
1997ChevroletK2500 Suburban—Rear—
1997ChevroletK3500—Rear—
1997ChevroletP30—Rear—
1997ChevroletTahoe—Rear—
1997GMCC1500—Rear—
1997GMCC1500 Suburban—Rear—
1997GMCC2500—Rear—
1997GMCC2500 Suburban—Rear—
1997GMCC3500—Rear—
1997GMCK1500—Rear—
1997GMCK1500 Suburban—Rear—
1997GMCK2500—Rear—
1997GMCK2500 Suburban—Rear—
1997GMCK3500—Rear—
1997GMCP3500—Rearwith 375mm Overall Length
1997GMCP3500—Rear—
1997GMCSavana 1500—Rear—
1997GMCSavana 2500—Rear—
1997GMCSavana 3500—Rear—
1997GMCYukon—Rear—
1996ChevroletC1500—Rear—
1996ChevroletC1500 Suburban—Rear—
1996ChevroletC2500—Rear—
1996ChevroletC2500 Suburban—Rear—
1996ChevroletC3500—Rear—
1996ChevroletExpress 1500—Rear—
1996ChevroletExpress 2500—Rear—
1996ChevroletExpress 3500—Rear—
1996ChevroletK1500—Rear—
1996ChevroletK1500 Suburban—Rear—
1996ChevroletK2500—Rear—
1996ChevroletK2500 Suburban—Rear—
1996ChevroletK3500—Rear—
1996ChevroletP30—Rear—
1996ChevroletTahoe—Rear—
1996GMCC1500—Rear—
1996GMCC1500 Suburban—Rear—
1996GMCC2500—Rear—
1996GMCC2500 Suburban—Rear—
1996GMCC3500—Rear—
1996GMCK1500—Rear—
1996GMCK1500 Suburban—Rear—
1996GMCK2500—Rear—
1996GMCK2500 Suburban—Rear—
1996GMCK3500—Rear—
1996GMCP3500—Rearwith 375mm Overall Length
1996GMCP3500—Rear—
1996GMCSavana 1500—Rear—
1996GMCSavana 2500—Rear—
1996GMCSavana 3500—Rear—
1996GMCYukon—Rear—
1990GMCC1500Sierra SLXRear—
1990GMCC1500Sierra SLERear—
Directly replaces or cross-references 37 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
BBB Industries — 11173BBB Industries — 13474Carlson — 15136DENSO Auto Parts — 234-4018DENSO Auto Parts — 234-4339Gates — 21539Gates — 215585S31655S81735S81828-12604-913-0138-22821335452133839125979901260491319178116193553062502401825024704251630802531220125347770AFS106DY-721FE6083FE80813OS823OS2469REA1005REA1961SG272SG1628SG1632SU1143SU9639SU9648