How to replace Knock Sensor 1 on GMC Sierra 1500?

To change Knock Sensor 1 one first has to lift and support the vehicle. Detach the knock sensor from the engine wiring harness electrical connector and separate the knock sensor bolt (739) from the spark knock sensor (718). For installation, place the knock sensor (718) onto the engine block and install the knock sensor bolt (739) to 25 Nm (18 lb ft). Lastly, connect the engine wiring harness electrical connector to the knock sensor.

OEM GMC Sierra 1500 Knock Sensor

Engine Knock Sensor

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8 Knock Sensors found

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GMC Sierra 1500 Knock Sensor Part Number: 12623730
$13.47 MSRP: $25.30
You Save: $11.83 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor); Ignition Knock (Detonation) Sensor
- Replaces: 12570125
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2013 GMC Sierra 1500 | Denali, Hybrid, SL, SLE, SLT, WT, XFE | 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L FULL HYBRID EV-FLEX (FHEV), 8 Cyl 6.0 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 6.0 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
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GMC Sierra 1500 Knock Sensor Part Number: 21024981
$32.61 MSRP: $61.25
You Save: $28.64 (47%)
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Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Replaced by: 19434673
- Replaces: 21024729
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2004 GMC Sierra 1500 | Base, HT, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS
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GMC Sierra 1500 Knock Sensor Part Number: 12623095
$23.43 MSRP: $44.02
You Save: $20.59 (47%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2023 GMC Sierra 1500 | AT4, AT4X, Base, Denali, Denali Ultimate, Elevation, Pro, SLE, SLT | 6 Cyl 4.3 L FLEX, 6 Cyl 4.3 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 5.3 L MILD HYBRID EV-GAS (MHEV), 8 Cyl 6.2 L GAS
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GMC Sierra 1500 Knock Sensor Part Number: 12589867
$62.53 MSRP: $127.00
You Save: $64.47 (51%)
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Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Replaces: 10456603
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2006 GMC Sierra 1500 | Base, C3, Denali, HT, Hybrid, SL, SLE, SLT, WT | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
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GMC Sierra 1500 Knock Sensor Part Number: 12663209
$4.26 MSRP: $8.00
You Save: $3.74 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2019-2023 GMC Sierra 1500 | Base, Elevation, Pro, SLE | 4 Cyl 2.7 L GAS
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GMC Sierra 1500 Knock Sensor Part Number: 12600327
$14.15 MSRP: $26.57
You Save: $12.42 (47%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2013 GMC Sierra 1500 | WT | 6 Cyl 4.3 L GAS
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GMC Sierra 1500 Knock Sensor Part Number: 10456075
Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2000 GMC Sierra 1500 | SL, SLE, SLT | 6 Cyl 4.3 L GAS
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GMC Sierra 1500 Knock Sensor Part Number: 12590195
$23.74 MSRP: $42.39
You Save: $18.65 (44%)
Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2006 GMC Sierra 1500 | Base, SL, WT | 6 Cyl 4.3 L GAS

GMC Sierra 1500 Knock Sensor

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GMC Sierra 1500 Knock Sensor Parts and Q&A

Knock Sensor
12623730
Q: How to replace Knock Sensor 1 on GMC Sierra 1500?
A:
To change Knock Sensor 1 one first has to lift and support the vehicle. Detach the knock sensor from the engine wiring harness electrical connector and separate the knock sensor bolt (739) from the spark knock sensor (718). For installation, place the knock sensor (718) onto the engine block and install the knock sensor bolt (739) to 25 Nm (18 lb ft). Lastly, connect the engine wiring harness electrical connector to the knock sensor.