Delphi ES20317 Oxygen Sensor - Center, Front or Rear

Brand Delphi ES20317
Position Front
Connector Shape Flat
Overall Length 310.0
Package Contents Oxygen Sensor, Instruction Sheet
Position(s) Center, Front, Rear. 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 Chevrolet, GMC, Oldsmobile, Cadillac, Pontiac, and Buick · 284 vehicles

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

Flat connector. Simplifies installation with a compact, easy-to-route design.

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

Cross-references BBB Industries 11066, Bosch 15703 and DENSO Auto Parts 234-4012 for the same application. See all 45.

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Free returns within 60 days if it doesn't fit when fitment is verified.

Delphi ES20317 Oxygen Sensor Overview

Delphi ES20317 is a heated oxygen sensor built for direct replacement service on a wide range of GM vehicles, including Chevrolet Corvette, Camaro, S10, Tahoe, GMC Yukon, and Pontiac Firebird applications. It uses a 4-wire design with a flat connector and 18 x 1.5 mm thread size for common OE-style exhaust mounting.

Key Features

  • Heated oxygen sensor for faster operating temperature and stable signal output
  • 4-wire configuration with flat connector shape
  • 18 x 1.5 mm thread size
  • 310.0 overall length
  • Includes oxygen sensor and instruction sheet
  • Compatible with front, rear, and center positions depending on vehicle application

Detailed Description

Delphi ES20317 is an emission control sensor engineered from Delphi’s OE heritage and decades of supplier experience with major automakers. It is a direct-fit oxygen sensor for vehicles such as the 1995-2003 Chevrolet Corvette, 1996-2001 Chevrolet S10, 1996-1999 GMC Yukon, and 1995-1996 Pontiac Firebird, with position-specific coverage that includes front, rear, and center locations where listed. This part cross-references Bosch 15703 and DENSO Auto Parts 234-4012 for the same application.

Common Issues This Sensor May Address

  • Check engine light related to oxygen sensor performance
  • Incorrect air-fuel mixture readings from a worn sensor
  • Reduced fuel control accuracy during closed-loop operation
  • Slow sensor response caused by age or contamination
  • Emission test failures tied to faulty exhaust feedback

Installation Notes and Tips

  • Verify the exact position on your vehicle before ordering; fitment varies by front, rear, and center locations.
  • Confirm connector shape, wire count, and thread size against the original sensor.
  • Inspect the exhaust bung threads before installation to ensure proper seating.
  • Use the application tab to match the correct year, make, model, and position.

Quality Assurance

Delphi builds this oxygen sensor using OE-based engineering knowledge developed through long-term supplier experience with top automakers. The ES20317 is intended to meet the fitment and electrical requirements of the listed applications, including Chevrolet, GMC, Buick, Pontiac, Cadillac, and Oldsmobile models across the covered years.

This part fits 284 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelLitersCylindersPositionNotes
2003ChevroletCorvette———Front—
2002ChevroletCorvette———Front—
2002ChevroletExpress 1500———Front—
2002ChevroletExpress 2500———FrontUnder 8,500lb GVW
2002ChevroletExpress 2500———Front—
2002GMCSavana 1500———Front—
2002GMCSavana 2500———FrontUnder 8,500lb GVW
2002GMCSavana 2500———Front—
2001ChevroletBlazer———Rear—
2001ChevroletBlazer———Front—
2001ChevroletCorvette———Front—
2001ChevroletExpress 1500———Front—
2001ChevroletExpress 2500———FrontUnder 8,500lb GVW
2001ChevroletExpress 2500———Front—
2001ChevroletS10———Rear—
2001ChevroletS10———Front—
2001GMCJimmy———Rear—
2001GMCJimmy———Front—
2001GMCSavana 1500———Front—
2001GMCSavana 2500———FrontUnder 8,500lb GVW
2001GMCSavana 2500———Front—
2001GMCSonoma———Rear—
2001GMCSonoma———Front—
2001OldsmobileBravada———Rear—
2001OldsmobileBravada———Front—
2000CadillacEscalade———Front—
2000ChevroletBlazer———Rear—
2000ChevroletBlazer———Front—
2000ChevroletCorvette———Front—
2000ChevroletExpress 1500———Front—
2000ChevroletExpress 2500———FrontUnder 8,500lb GVW
2000ChevroletExpress 2500———Front—
2000ChevroletS10———Rear—
2000ChevroletS10———Front—
2000GMCJimmy———Rear—
2000GMCJimmy———Front—
2000GMCSavana 1500———Front—
2000GMCSavana 2500———FrontUnder 8,500lb GVW
2000GMCSavana 2500———Front—
2000GMCSonoma———Rear—
2000GMCSonoma———Front—
2000OldsmobileBravada———Rear—
2000OldsmobileBravada———Front—
1999CadillacEscalade———Front—
1999ChevroletBlazer———Rear—
1999ChevroletBlazer———Front—
1999ChevroletC1500—5.7LV8Front—
1999ChevroletC1500 SuburbanLT——Front—
1999ChevroletCorvette———Front—
1999ChevroletExpress 1500———Front—
1999ChevroletExpress 2500———FrontUnder 8,500lb GVW
1999ChevroletExpress 2500———Front—
1999ChevroletK1500—5.7LV8Front—
1999ChevroletK1500 Suburban———Front—
1999ChevroletS10———Rear—
1999ChevroletS10———Front—
1999ChevroletTahoe———Front—
1999GMCC1500———Front—
1999GMCC1500 Suburban———Front—
1999GMCJimmy———Rear—
1999GMCJimmy———Front—
1999GMCK1500———Front—
1999GMCK1500 Suburban———Front—
1999GMCSavana 1500———Front—
1999GMCSavana 2500———FrontUnder 8,500lb GVW
1999GMCSavana 2500———Front—
1999GMCSonoma———Rear—
1999GMCSonoma———Front—
1999GMCYukon———Front—
1999OldsmobileBravada———Rear—
1999OldsmobileBravada———Front—
1998ChevroletBlazer———Rear—
1998ChevroletBlazer———Front—
1998ChevroletC1500———Front—
1998ChevroletC1500 Suburban———Front—
1998ChevroletC2500———Front—
1998ChevroletCorvette———Front—
1998ChevroletExpress 1500———Front—
1998ChevroletExpress 2500———FrontUnder 8,500lb GVW
1998ChevroletExpress 2500———Front—
1998ChevroletK1500———Front—
1998ChevroletK1500 Suburban———Front—
1998ChevroletK2500———Front—
1998ChevroletS10———Rear—
1998ChevroletS10———Front—
1998ChevroletTahoe———Front—
1998GMCC1500———Front—
1998GMCC1500 Suburban———Front—
1998GMCC2500———Front—
1998GMCJimmy———Rear—
1998GMCJimmy———Front—
1998GMCK1500———Front—
1998GMCK1500 Suburban———Front—
1998GMCK2500———Front—
1998GMCSavana 1500———Front—
1998GMCSavana 2500———FrontUnder 8,500lb GVW
1998GMCSavana 2500———Front—
1998GMCSonoma———Rear—
1998GMCSonoma———Front—
1998GMCYukon———Front—
1998OldsmobileBravada———Rear—
1998OldsmobileBravada———Front—
1997ChevroletAstro———Front—
1997ChevroletBlazer———Rear—
1997ChevroletBlazer———Front—
1997ChevroletC1500———Front—
1997ChevroletC1500 Suburban———Front—
1997ChevroletC2500———Front—
1997ChevroletCorvette———Front—
1997ChevroletExpress 1500———Front—
1997ChevroletExpress 2500———FrontUnder 8,500lb GVW
1997ChevroletExpress 2500———Front—
1997ChevroletK1500———Front—
1997ChevroletK1500 Suburban———Front—
1997ChevroletK2500———Front—
1997ChevroletS10———Rear—
1997ChevroletS10———Front—
1997ChevroletTahoe———Front—
1997GMCC1500———Front—
1997GMCC1500 Suburban———Front—
1997GMCC2500———Front—
1997GMCJimmy———Rear—
1997GMCJimmy———Front—
1997GMCK1500———Front—
1997GMCK1500 Suburban———Front—
1997GMCK2500———Front—
1997GMCSafari———Front—
1997GMCSavana 1500———Front—
1997GMCSavana 2500———FrontUnder 8,500lb GVW
1997GMCSavana 2500———Front—
1997GMCSonoma———Rear—
1997GMCSonoma———Front—
1997GMCYukon———Front—
1997OldsmobileBravada———Rear—
1997OldsmobileBravada———Front—
1997PontiacFirebird———Front—
1996BuickCentury———Front—
1996BuickLeSabre———Front—
1996BuickPark Avenue———Front—
1996BuickRegal———Front—
1996BuickRiviera———Front—
1996BuickRoadmaster———Rear—
1996BuickRoadmaster———Front—
1996BuickSkylark———Front—
1996CadillacFleetwood———Rear—
1996CadillacFleetwood———Front—
1996ChevroletAstro———Front—
1996ChevroletBlazer———Rear—
1996ChevroletBlazer———Front—
1996ChevroletC1500———Front—
1996ChevroletC1500 Suburban———Front—
1996ChevroletC2500———Front—
1996ChevroletC2500 Suburban———Front—
1996ChevroletCamaro———Front—
1996ChevroletCaprice———Rear—
1996ChevroletCaprice———Front—
1996ChevroletCorsica———Front—
1996ChevroletCorvette———Rear—
1996ChevroletCorvette———Front—
1996ChevroletExpress 1500———Front—
1996ChevroletExpress 2500———FrontUnder 8,500lb GVW
1996ChevroletExpress 2500———Front—
1996ChevroletImpala———Rear—
1996ChevroletImpala———Front—
1996ChevroletK1500———Front—
1996ChevroletK1500 Suburban———Front—
1996ChevroletK2500———Front—
1996ChevroletK2500 Suburban———Front—
1996ChevroletLumina———Front—
1996ChevroletLumina APV———Front—
1996ChevroletMonte CarloZ34——Front—
1996ChevroletMonte CarloLS——Front—
1996ChevroletS10———Rear—
1996ChevroletS10———Front—
1996ChevroletTahoe———Front—
1996GMCC1500———Front—
1996GMCC1500 Suburban———Front—
1996GMCC2500———Front—
1996GMCC2500 Suburban———Front—
1996GMCJimmy———Rear—
1996GMCJimmy———Front—
1996GMCK1500———Front—
1996GMCK1500 Suburban———Front—
1996GMCK2500———Front—
1996GMCK2500 Suburban———Front—
1996GMCSafari———Front—
1996GMCSavana 1500———Front—
1996GMCSavana 2500———FrontUnder 8,500lb GVW
1996GMCSavana 2500———Front—
1996GMCSonoma———Rear—
1996GMCSonoma———Front—
1996GMCYukon———Front—
1996Oldsmobile88———Front—
1996Oldsmobile98———Front—
1996OldsmobileAchieva———Front—
1996OldsmobileBravada———Rear—
1996OldsmobileBravada———Front—
1996OldsmobileCutlass Ciera———N/A—
1996OldsmobileCutlass Supreme———Front—
1996OldsmobileLSS———Front—
1996OldsmobileSilhouette———Front—
1996PontiacBonneville———Front—
1996PontiacFirebird———Front—
1996PontiacGrand Am———Front—
1996PontiacGrand Prix———Front—
1996PontiacTrans Sport———Front—
1995BuickCentury———N/A—
1995BuickLeSabre———N/A—
1995BuickPark Avenue———N/A—
1995BuickRegal———Rear—
1995BuickRegal———Front—
1995BuickRegal———N/A—
1995BuickRiviera———N/A—
1995BuickRoadmaster———N/A—
1995BuickSkylark———N/A—
1995CadillacFleetwood———N/A—
1995ChevroletBlazer———N/A—
1995ChevroletCamaro———N/A—
1995ChevroletCamaro———Rear—
1995ChevroletCamaro———Front—
1995ChevroletCamaro———Center—
1995ChevroletCaprice———N/A—
1995ChevroletCorsica———N/A—
1995ChevroletCorvette———Rear—
1995ChevroletCorvette———Front—
1995ChevroletImpala———N/A—
1995ChevroletLumina———N/A—
1995ChevroletLumina APV———N/A—
1995ChevroletMonte CarloZ34——N/A—
1995ChevroletMonte CarloLS——N/A—
1995ChevroletP30———N/A—
1995ChevroletS10———N/A—
1995GMCJimmy———N/A—
1995GMCP3500———N/A—
1995GMCSonoma———N/Awith 310mm Overall Length
1995Oldsmobile88———N/A—
1995Oldsmobile98———N/A—
1995OldsmobileAchieva———N/A—
1995OldsmobileCutlass Ciera———N/A—
1995OldsmobileCutlass Supreme———N/A—
1995OldsmobileSilhouette———N/A—
1995PontiacBonneville———N/A—
1995PontiacFirebird———N/A—
1995PontiacFirebird———Rear—
1995PontiacFirebird———Front—
1995PontiacFirebird———Center—
1995PontiacGrand Am———N/A—
1995PontiacGrand Prix———N/A—
1995PontiacTrans Sport———N/A—
1994BuickCentury———N/A—
1994BuickLeSabre———N/A—
1994BuickPark Avenue———N/A—
1994BuickRegal———Front—
1994BuickRegal———N/A—
1994BuickRoadmaster———N/A—
1994BuickSkylark———N/A—
1994CadillacFleetwood———N/A—
1994ChevroletCamaro———N/A—
1994ChevroletCaprice———N/A—
1994ChevroletCorsica———N/A—
1994ChevroletCorvette———N/A—
1994ChevroletImpala———N/A—
1994ChevroletLumina———N/A—
1994ChevroletLumina APV———N/A—
1994ChevroletS10———N/AOptional
1994ChevroletS10 Blazer———N/AOptional
1994GMCJimmy———N/Awith 300mm Overall Length; Optional
1994GMCSonoma———N/Awith 310mm Overall Length; Optional
1994Oldsmobile88———N/A—
1994Oldsmobile98———N/A—
1994OldsmobileAchieva———N/A—
1994OldsmobileCutlass Ciera———N/A—
1994OldsmobileCutlass Cruiser———N/A—
1994OldsmobileCutlass Supreme———N/A—
1994OldsmobileSilhouette———N/A—
1994PontiacBonneville———N/A—
1994PontiacFirebird———N/A—
1994PontiacGrand Am———N/A—
1994PontiacGrand Prix———N/A—
1994PontiacTrans Sport———N/A—
1993BuickRegal———Front—
1993OldsmobileCutlass Supreme———N/A—
1990GMCC1500Sierra SLX——Frontwith 4L60-E Transmission Code
1990GMCC1500Sierra SLE——Frontwith 4L60-E Transmission Code
Directly replaces or cross-references 45 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
BBB Industries — 11066Bosch — 15703DENSO Auto Parts — 234-4012NTK — 21006Walker Products — 250-240125S30295S3071138-215138-216138-221213509191789181917893019178937251328192513350425133791251611512516307925165313251715792531218425312188253122002534776925347795AFS75AFS90AFS105DY-578DY-582DY-729FE911FE6080OS128OS820REA1007REA1009SG236SG239SG278SG454SU100SU187SU1139