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2021 GMC Sierra 1500
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Lifetime Replacement
2021 GMC Sierra 1500

2021 GMC Sierra 1500 Knock Sensors

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Knock Sensor
AC Delco®
Knock Sensor
Part Number: AC12663209
Guaranteed to Fit
$5.49
Vehicle Fitment
  • 2021 GMC Sierra 1500 SLE 4 Cyl 2.7L Engine Des: L3B, Engine Vin: K, 4-Door, Crew Cab Pickup, Without Retainer Or Bolt
  • 2021 GMC Sierra 1500 Elevation 4 Cyl 2.7L Engine Des: L3B, Engine Vin: K, 4-Door, Crew Cab Pickup, Without Retainer Or Bolt
  • 2021 GMC Sierra 1500 Base 4 Cyl 2.7L Engine Des: L3B, Engine Vin: K, 4-Door, Extended Cab Pickup, Without Retainer Or Bolt
Product Details
Quantity Sold : Sold individuallyWarranty : 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.

Knock Sensor
Walker Products®
Knock Sensor
Part Number: WKP2421329
Guaranteed to Fit
$19.49
Vehicle Fitment
  • 2021 GMC Sierra 1500 AT4 8 Cyl 6.2L
  • 2021 GMC Sierra 1500 SLT 8 Cyl 6.2L
  • 2021 GMC Sierra 1500 AT4 8 Cyl 5.3L
  • 2021 GMC Sierra 1500 Base 6 Cyl 4.3L
  • 2021 GMC Sierra 1500 Denali 8 Cyl 5.3L
  • 2021 GMC Sierra 1500 Base 8 Cyl 5.3L
  • 2021 GMC Sierra 1500 Elevation 8 Cyl 5.3L
  • 2021 GMC Sierra 1500 SLE 8 Cyl 5.3L
  • 2021 GMC Sierra 1500 Denali 8 Cyl 6.2L
  • 2021 GMC Sierra 1500 SLT 8 Cyl 5.3L
Product Details
Quantity 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.

Knock Sensor
Motorad®
Knock Sensor
Part Number: MRD1KS1347
Guaranteed to Fit
$23.49
Vehicle Fitment
  • 2021 GMC Sierra 1500 AT4 8 Cyl 6.2L
  • 2021 GMC Sierra 1500 SLT 8 Cyl 6.2L
  • 2021 GMC Sierra 1500 AT4 8 Cyl 5.3L
  • 2021 GMC Sierra 1500 Base 6 Cyl 4.3L
  • 2021 GMC Sierra 1500 Denali 8 Cyl 5.3L
  • 2021 GMC Sierra 1500 Base 8 Cyl 5.3L
  • 2021 GMC Sierra 1500 Elevation 8 Cyl 5.3L
  • 2021 GMC Sierra 1500 SLE 8 Cyl 5.3L
  • 2021 GMC Sierra 1500 Denali 8 Cyl 6.2L
  • 2021 GMC Sierra 1500 SLT 8 Cyl 5.3L
Product Details
Quantity Sold : Sold individuallyWarranty : 12-month Motorad 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.

GM Original Equipment Series Knock Sensor
AC Delco®
GM Original Equipment Series Knock Sensor
Part Number: AC12623095
Guaranteed to Fit
$22.49
Vehicle Fitment
  • 2021 GMC Sierra 1500 AT4 8 Cyl 6.2L Engine Des: L87, Engine Vin: L, 4-Door, Crew Cab Pickup
  • 2021 GMC Sierra 1500 SLT 8 Cyl 6.2L Engine Des: L87, Engine Vin: L, 4-Door, Crew Cab Pickup
  • 2021 GMC Sierra 1500 AT4 8 Cyl 5.3L Engine Des: L84, Engine Vin: D, 4-Door, Crew Cab Pickup
  • 2021 GMC Sierra 1500 Base 6 Cyl 4.3L Engine Des: LV3, Engine Vin: H, 2-Door, Standard Cab Pickup
  • 2021 GMC Sierra 1500 Denali 8 Cyl 5.3L Engine Des: L84, Engine Vin: D, 4-Door, Crew Cab Pickup
  • 2021 GMC Sierra 1500 Base 8 Cyl 5.3L Engine Des: L82, Engine Vin: F, 4-Door, Crew Cab Pickup
  • 2021 GMC Sierra 1500 Elevation 8 Cyl 5.3L Engine Des: L84, Engine Vin: D, 4-Door, Extended Cab Pickup
  • 2021 GMC Sierra 1500 SLE 8 Cyl 5.3L Engine Des: L84, Engine Vin: D, 4-Door, Crew Cab Pickup
  • 2021 GMC Sierra 1500 Denali 8 Cyl 6.2L Engine Des: L87, Engine Vin: L, 4-Door, Crew Cab Pickup
  • 2021 GMC Sierra 1500 SLT 8 Cyl 5.3L Engine Des: L84, Engine Vin: D, 4-Door, Crew Cab Pickup
Product Details
Quantity Sold : Sold individuallyWarranty : 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.

Series : GM Original Equipment Series
Page 1 of 1 | Showing 1 - 4 of 4 results

Popular Products

Helpful Automotive Resources

P0334 Code: Knock Sensor 2 Circuit Intermittent (Bank 2)
P0334 Code: Knock Sensor 2 Circuit Intermittent (Bank 2)The knock sensor generates a low amount of electricity while the engine is running.   A code P0334 will be stored if the PCM detects an unusual signal from knock sensor 2.
P0324 Code: Knock Control System Error
P0324 Code: Knock Control System ErrorThe knock sensor is part of the knock control system that includes its connector, wiring, and the PCM. Most sensors are attached to the engine block, cylinder head, or intake manifold. In most engines, there is a knock sensor for every cylinder bank. There are some engine designs that have
P0333 Code: Knock Sensor 2 Circuit High Bank 2
P0333 Code: Knock Sensor 2 Circuit High Bank 2The algorithms in the ECM/PCM are set up in such a way that spurious knocking noises not related to combustion are ignored. – Richard McCuistian, ASE Certified Master Automobile Technician
8 of the Most Important Car Sensors You Should Know About
8 of the Most Important Car Sensors You Should Know AboutAs a driver, you must know what these sensors are and how they contribute to your vehicle’s performance. Here are some of the most common car sensors you should know about. Oxygen Sensor The oxygen (O2) sensor measures the exhaust’s oxygen content.
P0326 Code: Knock Sensor 1 Circuit Range / Performance Bank 1
P0326 Code: Knock Sensor 1 Circuit Range / Performance Bank 1A knock sensor is a one-wire or two-wire sensor mounted on a cylinder block, and it detects engine knocking. “Knock sensor 1” in this code refers to the first sensor (if there are two), while “bank 1” refers to the side of the engine with cylinder #1.
P0328 Code: Knock Sensor 1 Circuit High (Bank 1 )
P0328 Code: Knock Sensor 1 Circuit High (Bank 1 )Knock sensors are devices that are used to detect engine knock. This sensor is typically a two-wire sensor, though there are some devices that only have one wire. The knock sensor receives a 5-volt reference and returns a signal to the PCM.