How to replace the knock sensor on the left side on Chevrolet Trailblazer?

To replace knock sensor on the left, there is first removing the knock sensor mounting bolt for it. Next, open the knock sensor electrical connector from the engine harness by unhooking it. Next, take the knock sensor off the engine block. A disconnect will also need to be seen with the reconnection of the electrical connectors of the engine harness and the knock sensor. Mount the knock sensor on the engine block and screw the mounting bolt of the knock sensor. Last but not least, fasten the knock sensor mounting bolt to torque reading as at 20 N.m (15 lb ft).

OEM Chevrolet Trailblazer Knock Sensor

Engine Knock Sensor

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Chevrolet Trailblazer Knock Sensor
Part Number: 12623730
$13.47 MSRP: $25.30
You Save: $11.83 (47%)
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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:
- 2006-2009 Chevrolet Trailblazer | Base, LS, LT, SS | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
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Chevrolet Trailblazer Knock Sensor
Part Number: 12567446
$26.64 MSRP: $50.00
You Save: $23.36 (47%)
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Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Replaced by: 19434672
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2005 Chevrolet Trailblazer | LS, LT, LTZ, North Face | 6 Cyl 4.2 L GAS
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Chevrolet Trailblazer Knock Sensor
Part Number: 55494828
$14.84 MSRP: $26.50
You Save: $11.66 (44%)
ADD TO CART
Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Replaced by: 12737721
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2024 Chevrolet Trailblazer | L, LS, LT | 3 Cyl 1.2 L GAS
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Chevrolet Trailblazer Knock Sensor
Part Number: 12663209
$4.19 MSRP: $7.57
You Save: $3.38 (45%)
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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:
- 2021-2024 Chevrolet Trailblazer | ACTIV, LS, LT, RS | 3 Cyl 1.3 L GAS
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Chevrolet Trailblazer Knock Sensor
Part Number: 24100388
$25.69 MSRP: $48.26
You Save: $22.57 (47%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002 Chevrolet Trailblazer | LS, LT, LTZ, North Face | 6 Cyl 4.2 L GAS

Chevrolet Trailblazer Knock Sensor

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Chevrolet Trailblazer Knock Sensor Parts Questions & Experts Answers

Knock Sensor
12623730
Q: How to replace the knock sensor on the left side on Chevrolet Trailblazer?
A: To replace knock sensor on the left, there is first removing the knock sensor mounting bolt for it. Next, open the knock sensor electrical connector from the engine harness by unhooking it. Next, take the knock sensor off the engine block. A disconnect will also need to be seen with the reconnection of the electrical connectors of the engine harness and the knock sensor. Mount the knock sensor on the engine block and screw the mounting bolt of the knock sensor. Last but not least, fasten the knock sensor mounting bolt to torque reading as at 20 N.m (15 lb ft).

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