2021 GMC Sierra 2500 HD Oxygen Sensors

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Driver Side, After Catalytic Converter Oxygen Sensor, Engine Des: L8T, Engine Vin: 7, 4-Door, Extended Cab Pickup, Sold individually, 6.6L - Driver Side, After Catalytic Converter
AC Delco®
Driver Side, After Catalytic Converter Oxygen Sensor, Engine Des: L8T, Engine Vin: 7, 4-Door, Extended Cab Pickup, Sold individually, 6.6L - Driver Side, After Catalytic Converter
Part Number: AC12670253
Guaranteed to Fit
$45.99
Vehicle Fitment
  • 2021 GMC Sierra 2500 HD AT4 8 Cyl 6.6L Engine Des: L8T, Engine Vin: 7, 4-Door, Crew Cab Pickup
  • 2021 GMC Sierra 2500 HD Denali 8 Cyl 6.6L Engine Des: L8T, Engine Vin: 7, 4-Door, Crew Cab Pickup
  • 2021 GMC Sierra 2500 HD SLT 8 Cyl 6.6L Engine Des: L8T, Engine Vin: 7, 4-Door, Extended Cab Pickup
  • 2021 GMC Sierra 2500 HD SLE 8 Cyl 6.6L Engine Des: L8T, Engine Vin: 7, 2-Door, Standard Cab Pickup
  • 2021 GMC Sierra 2500 HD Base 8 Cyl 6.6L Engine Des: L8T, Engine Vin: 7, 2-Door, Standard Cab Pickup
Product Details
Location : Driver Side, After Catalytic ConverterQuantity Sold : Sold IndividuallyProduct Fit : Direct FitWarranty : 24-months or unlimited mile AC Delco limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

After Catalytic Converter Oxygen Sensor, Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S2, B2S2, Sold individually, 4-wire, 6.6L - After Catalytic Converter
Walker Products®
After Catalytic Converter Oxygen Sensor, Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S2, B2S2, Sold individually, 4-wire, 6.6L - After Catalytic Converter
Part Number: WKP350341064
Guaranteed to Fit
$40.49
Vehicle Fitment
  • 2021 GMC Sierra 2500 HD Denali 8 Cyl 6.6L Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S2, B2S2
  • 2021 GMC Sierra 2500 HD SLT 8 Cyl 6.6L Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S2, B2S2
  • 2021 GMC Sierra 2500 HD SLE 8 Cyl 6.6L Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S2, B2S2
  • 2021 GMC Sierra 2500 HD AT4 8 Cyl 6.6L Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S2, B2S2
  • 2021 GMC Sierra 2500 HD Base 8 Cyl 6.6L Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S2, B2S2
Product Details
Location : After Catalytic ConverterNotes : (4) Wire Quantity; 20 ga. Wire Gauge Measurement; 18 mm Thread Diameter; 325 mm Overall Length; HeatedType : 4-wireQuantity Sold : Sold IndividuallyProduct Fit : Direct FitThread Size : M18 Thread SizeMounting Style : Threaded-in Mounting StyleConnector Gender : Male ConnectorConnector Shape : Rectangular Connector ShapeWarranty : 90-day Walker Products limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Nickel and Nickel Alloyed Stainless Steel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

After Catalytic Converter Oxygen Sensor, Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S2, B2S2, Sold individually, 4-wire, 6.6L - After Catalytic Converter
Walker Products®
After Catalytic Converter Oxygen Sensor, Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S2, B2S2, Sold individually, 4-wire, 6.6L - After Catalytic Converter
Part Number: WKP250241212
Guaranteed to Fit
$50.15
Vehicle Fitment
  • 2021 GMC Sierra 2500 HD Denali 8 Cyl 6.6L Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S2, B2S2
  • 2021 GMC Sierra 2500 HD SLT 8 Cyl 6.6L Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S2, B2S2
  • 2021 GMC Sierra 2500 HD SLE 8 Cyl 6.6L Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S2, B2S2
  • 2021 GMC Sierra 2500 HD AT4 8 Cyl 6.6L Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S2, B2S2
  • 2021 GMC Sierra 2500 HD Base 8 Cyl 6.6L Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S2, B2S2
Product Details
Location : After Catalytic ConverterNotes : (4) Wire Quantity; 20 ga. Wire Gauge Measurement; 18 mm Thread Diameter; 325 mm Overall Length; HeatedType : 4-wireQuantity Sold : Sold IndividuallyProduct Fit : Direct FitThread Size : M18 Thread SizeMounting Style : Threaded-in Mounting StyleConnector Gender : Male ConnectorConnector Shape : Rectangular Connector ShapeWarranty : 90-day Walker Products limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Nickel and Nickel Alloyed Stainless Steel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Before Catalytic Converter Oxygen Sensor, Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S1, B2S1, Sold individually, 6.6L - Before Catalytic Converter
Walker Products®
Before Catalytic Converter Oxygen Sensor, Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S1, B2S1, Sold individually, 6.6L - Before Catalytic Converter
Part Number: WKP35034988
Guaranteed to Fit
$58.99
Vehicle Fitment
  • 2021 GMC Sierra 2500 HD AT4 8 Cyl 6.6L Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S1, B2S1
  • 2021 GMC Sierra 2500 HD Denali 8 Cyl 6.6L Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S1, B2S1
  • 2021 GMC Sierra 2500 HD SLT 8 Cyl 6.6L Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S1, B2S1
  • 2021 GMC Sierra 2500 HD SLE 8 Cyl 6.6L Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S1, B2S1
  • 2021 GMC Sierra 2500 HD Base 8 Cyl 6.6L Eng Des: L8T, Eng Vin: 7, FI, Naturally Aspirated, GAS, B1S1, B2S1
Product Details
Location : Before Catalytic ConverterQuantity Sold : Sold IndividuallyWarranty : 90-day Walker Products limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Before Catalytic Converter, Driver or Passenger Si Oxygen Sensor, enginedesignationname: L8T, Eng. VIN: 7, FI, Naturally Aspirated, GAS, B1S1; B2S1, Sold individually, 6.6L - Before Catalytic Converter, Driver or Passenger Side
Walker Products®
Before Catalytic Converter, Driver or Passenger Si Oxygen Sensor, enginedesignationname: L8T, Eng. VIN: 7, FI, Naturally Aspirated, GAS, B1S1; B2S1, Sold individually, 6.6L - Before Catalytic Converter, Driver or Passenger Side
Part Number: WKP250241268
Guaranteed to Fit
$66.49
Vehicle Fitment
  • 2021 GMC Sierra 2500 HD AT4 8 Cyl 6.6L enginedesignationname: L8T, Eng. VIN: 7, FI, Naturally Aspirated, GAS, B1S1; B2S1
  • 2021 GMC Sierra 2500 HD Denali 8 Cyl 6.6L enginedesignationname: L8T, Eng. VIN: 7, FI, Naturally Aspirated, GAS, B1S1; B2S1
  • 2021 GMC Sierra 2500 HD SLT 8 Cyl 6.6L enginedesignationname: L8T, Eng. VIN: 7, FI, Naturally Aspirated, GAS, B1S1; B2S1
  • 2021 GMC Sierra 2500 HD SLE 8 Cyl 6.6L enginedesignationname: L8T, Eng. VIN: 7, FI, Naturally Aspirated, GAS, B1S1; B2S1
  • 2021 GMC Sierra 2500 HD Base 8 Cyl 6.6L enginedesignationname: L8T, Eng. VIN: 7, FI, Naturally Aspirated, GAS, B1S1; B2S1
Product Details
Location : Before Catalytic Converter, Driver or Passenger SideQuantity Sold : Sold IndividuallyProduct Fit : Direct FitWarranty : 90-day Walker Products limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Nickel and Nickel Alloyed Stainless Steel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Oxygen Sensor, Sold Individually, 3-wire, Walker Products Original Equipment Base Sensor
Walker Products®
Oxygen Sensor, Sold Individually, 3-wire, Walker Products Original Equipment Base Sensor
Part Number: WKP250-23000
Universal Fit
$52.99
Product Details
Notes : 9.37 in. Overall Length; Heated Sensor Type; 20 Wire Gauge MeasurementType : 3-wireQuantity Sold : Sold IndividuallyProduct Fit : UniversalWire Length : 5.83 in. Wire LengthThread Size : 18 mm Thread SizeMounting Style : Threaded-in Mounting StyleWarranty : 90-day Walker Products limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Walker Products Original Equipment Base Sensor
Universal,Bosch LSU 4.2 Wideband Sensor, Bung, Connector, Wire-Seals and Pins.
AEM®
Universal,Bosch LSU 4.2 Wideband Sensor, Bung, Connector, Wire-Seals and Pins.
Part Number: A18302002
Universal Fit
$210.95
Product Details
Quantity Sold : Sold IndividuallyProduct Fit : UniversalProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Specialty Part : Performance Part by JCW
Universal Oxygen Sensor 1-Wire – Sold Individually
Walker Products®
Universal Oxygen Sensor 1-Wire – Sold Individually
Part Number: WKP932-41004
Universal Fit
$59.99
Product Details
Notes : 20.0 Wire Gauge Measurement; Non-Heated Sensor Type; 20.79 in. Overall LengthType : 1-wireQuantity Sold : Sold IndividuallyProduct Fit : UniversalWire Length : 17.24 in. Wire LengthThread Size : 18 mm Thread SizeMounting Style : Threaded-in Mounting StyleConnector Gender : Female ConnectorWarranty : 90-day Walker Products limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Oxygen Sensor, Sold Individually, 4-wire, Walker Products Original Equipment Base Sensor
Walker Products®
Oxygen Sensor, Sold Individually, 4-wire, Walker Products Original Equipment Base Sensor
Part Number: 25024400
Universal Fit
$49.49
Product Details
Notes : 20.0 Wire Gauge Measurement; 18.0 mm Thread DiameterType : 4-wireQuantity Sold : Sold IndividuallyProduct Fit : UniversalWire Length : 8.25 in. Wire LengthWarranty : 90-day Walker Products limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Walker Products Original Equipment Base Sensor
Universal Oxygen Sensor 2-Wire – Sold Individually.
Walker Products®
Universal Oxygen Sensor 2-Wire – Sold Individually.
Part Number: WKP932-42001
Universal Fit
$98.49
Product Details
Notes : Industrial; 16.85 in. Overall Length; Non-Heated Sensor Type; 20 Wire Gauge MeasurementType : 2-wireQuantity Sold : Sold IndividuallyProduct Fit : UniversalWire Length : 13.31 in. Wire LengthThread Size : 18 mm Thread SizeMounting Style : Threaded-in Mounting StyleConnector Gender : Female ConnectorWarranty : 90-day Walker Products limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Oxygen Sensor - Universal, May Require Modification
Bosch®
Oxygen Sensor - Universal, May Require Modification
Part Number: BS15741
Universal Fit
$47.99
Product Details
Notes : Heated Type; Metal Housing Material; Steel Color/FinishType : 4-wireQuantity Sold : Sold IndividuallyProduct Fit : UniversalWire Length : 27 in. Wire LengthMounting Style : Threaded-in Mounting StyleHex Size : 22 mm Hex SizeConnector Gender : Female ConnectorWarranty : 1-year Bosch limited warrantyPromotions : CarParts EuroEcomm Landing Page : EuroSeries : OE Replacement Series
Oxygen Sensor, 4-wire, Universal, Needs Splicing, Walker Products Aftermarket Base Sensor
Walker Products®
Oxygen Sensor, 4-wire, Universal, Needs Splicing, Walker Products Aftermarket Base Sensor
Part Number: WKP350-34200
Universal Fit
$37.49
Product Details
Notes : 9.37 in. Overall Length; Heated Sensor Type; 20 Wire Gauge MeasurementType : 4-wireQuantity Sold : Sold IndividuallyProduct Fit : UniversalWire Length : 5.83 in. Wire LengthThread Size : 18 mm Thread SizeMounting Style : Threaded-in Mounting StyleWarranty : 90-day Walker Products limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Walker Products Aftermarket Base Sensor
Atomic, O2 Sensor Wideband
MSD®
Atomic, O2 Sensor Wideband
Part Number: M46A2930
Universal Fit
$158.95
Product Details
Quantity Sold : Sold IndividuallyProduct Fit : UniversalWarranty : 1-year MSD limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : Holley Brands Memorial Day SaleSpecialty Part : Performance Part by JCW
Universal, Oxygen Sensor Sold individually
Holley®
Universal, Oxygen Sensor Sold individually
Part Number: H19554101
Universal Fit
$199.95
Product Details
Quantity Sold : Sold IndividuallyProduct Fit : UniversalWarranty : Lifetime Holley limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : Holley Brands Memorial Day SaleSpecialty Part : Performance Part by JCW
Universal, Oxygen Sensor Sold individually
Holley®
Universal, Oxygen Sensor Sold individually
Part Number: H19554100
Universal Fit
$299.95
Product Details
Quantity Sold : Sold IndividuallyProduct Fit : UniversalWarranty : Lifetime Holley limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Specialty Part : Performance Part by JCW
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P2187 Code: System too Lean at Idle (Bank 1)
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P2270 Code: O2 Sensor Signal Biased / Stuck Lean (Bank 1, Sensor 2)
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P0141 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)
P0141 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)With that in mind, it’s important to note that Bank 1 is always where the number 1 cylinder is located. Thus, on Ford pickups, Bank 1 is the passenger side bank, but on Chevy and Dodge pickups, Bank 1 is the driver side bank. You need to know this, or
P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3
P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3Bank 1 is the side of the engine where the #1 cylinder is located. P0042 code is set when your car’s PCM determines a potential problem with the heater element circuit of the oxygen sensor.
P0135 Code: Heated O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
P0135 Code: Heated O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)Diagnostic trouble code (DTC) P0135 stands for “Oxygen O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1).” It is set when the car’s primary computer—also called the powertrain control module or PCM—determines that the heated oxygen sensor (HO2S) 1 heater current is higher or lower than the ideal amp for
P0134: O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 1)
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