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

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

5 Knock Sensors found

View related parts
Chevrolet Trailblazer Knock Sensor Part Number: 12623730
$13.47 MSRP: $25.30
You Save: $11.83 (47%)
Ships in 1-2 Business Days
ADD TO CART
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
View related parts
Chevrolet Trailblazer Knock Sensor Part Number: 12567446
$27.17 MSRP: $51.00
You Save: $23.83 (47%)
Ships in 1-2 Business Days
ADD TO CART
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
View related parts
Chevrolet Trailblazer Knock Sensor Part Number: 55494828
$15.14 MSRP: $27.04
You Save: $11.90 (45%)
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
View related parts
Chevrolet Trailblazer Knock Sensor Part Number: 12663209
$4.12 MSRP: $7.73
You Save: $3.61 (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:
- 2021-2024 Chevrolet Trailblazer | ACTIV, LS, LT, RS | 3 Cyl 1.3 L GAS
View related parts
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

Want to cut long-term maintenance and repair costs? Choose OEM Knock Sensor. Those parts deliver top durability you can trust. On our site, you'll find a huge catalog of genuine Chevrolet Trailblazer parts. Prices are unbeatable, so you can keep more in your pocket. Every OEM Chevrolet Trailblazer Knock Sensor includes a manufacturer's warranty. You can also get an easy return policy that keeps buying risk free. Fast delivery, get your car on the road quickly. It's simple to search, compare, and order. Stop guessing about quality or fit. Order today and save with parts that last.

Chevrolet Trailblazer automobiles use the Knock Sensor that helps to determine the presence of knock within the engine, this is a phenomenon characterized by wrong ignition rhythm. This device informs the PCM that it is not be sending the optimal signals to the ignitions to control high detonation. Usually, knock sensors used in Chevrolet models are piezoelectric, which transforms those vibrations into electrical signals and means that pressure peaks, which signify knocking, can be monitored constantly. In the recent past, the Trailblazer has incorporated a very complex knock sensor that sets ignition from one cylinder to the other and controls boost pressure depending on engine architecture. This is so because it enables both optimum performance and protection of the engine irrespective of fuel quality. This way, the Chevrolet Trailblazer maintains the operation near the 'knock limit' on one hand contributing to the car's performance but on the other hand protecting the engine depending on the road conditions.

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).