How to check and replace Camshaft Position Sensor,Coolant Temperature Sensor,Crankshaft Position Sensor,Intake Manifold Temperature Sensor,Knock Sensor,Oxygen Sensor,Vehicle Speed Sensor,Neutral Safety Switch,MAP Sensor and Throttle Position Sensor on Chevrolet Blazer,S10,GMC Jimmy and Sonoma?

Various engine sensors and components have checking procedures,the engine coolant temperature (ECT) sensor is a thermistor that changes resistance with temperature, and a failure in the circuit can cause trouble codes. The resistance should be measured when cold and warm while ensuring reference voltage from PCM is around 5.0 volts for the verification. Manifold Absolute Pressure (MAP) Sensor monitors changes in intake manifold pressure then varies its voltage output accordingly. Look at the reference voltage and signal voltage with the ignition on and engine off, and observe voltage changes as the engine's vacuum changes. Intake Air Temperature (IAT) Sensor acts as a thermistor where you can measure its resistance at different temperatures to make sure it changes as expected. Also, use a scan tool to monitor the IAT sensor for performance. The oxygen sensor in exhaust detects oxygen content which you can check its millivolt signal while warming up your engine. Check whether the oxygen sensor heater has correct voltage or not. Vehicle Speed Sensor (VSS) provides speed data to PCM which can be checked for reference voltage. Depending on the type of engine, Camshaft Sensor and Crankshaft Sensor should be checked for resistance and proper signal output. Finally, Knock Sensors detect engine knock which should be checked for reference voltage and resistance. If any component fails these checks, replacement may be necessary.

Genuine Chevrolet Blazer Knock Sensor

Engine Knock Sensor

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14 Knock Sensors found

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Chevrolet Blazer Sensor Assembly, Knock
Part Number: 12636736
$18.32 MSRP: $34.56
You Save: $16.24 (47%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: SENSOR, Distributor (also Knock Sensor); Camshaft Sensor, Knock Sensor
- Replaced by: 12729597
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2019-2021 Chevrolet Blazer | HIGH COUNTRY/LTZ 4 DOOR SUV, LT 4 DOOR SUV, RS 4 DOOR SUV | 6 Cyl 3.6L
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Chevrolet Blazer Sensor Assembly, Knock
Part Number: 12623095
$21.68 MSRP: $40.92
You Save: $19.24 (48%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: SENSOR, Distributor (also Knock Sensor); Knock Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2019-2021 Chevrolet Blazer | L 4 DOOR SUV, LT 4 DOOR SUV | 4 Cyl 2.5L
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Chevrolet Blazer Sensor,Knock
Part Number: 10456288
$43.61 MSRP: $90.57
You Save: $46.96 (52%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: SENSOR, Distributor (also Knock Sensor); ESC Sensor, Knock Sensor
- Replaces: 10456018
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1987-1994 Chevrolet Blazer | 1/2 TON | 6 Cyl 2.8L, 6 Cyl 4.3L, 8 Cyl 5.0L, 8 Cyl 5.7L, 8 Cyl 6.2L Diesel
- 1985 Chevrolet Blazer | 1/2 TON
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Chevrolet Blazer Sensor,Knock
Part Number: 10456549
$53.64 MSRP: $111.39
You Save: $57.75 (52%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: SENSOR, Distributor (also Knock Sensor); ESC Sensor, Knock Sensor
- Replaces: 10456031
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1987-1994 Chevrolet Blazer | 1/2 TON | 6 Cyl 2.8L, 6 Cyl 4.3L, 8 Cyl 5.0L, 8 Cyl 5.7L, 8 Cyl 6.2L Diesel
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Chevrolet Blazer Sensor Assembly, Knock
Part Number: 21024981
$30.98 MSRP: $58.47
You Save: $27.49 (48%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: SENSOR, Distributor (also Knock Sensor); Knock Sensor
- Replaces: 21024729
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2005 Chevrolet Blazer | 2 DOOR, 4 DOOR | 6 Cyl 4.3L
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Chevrolet Blazer Sensor,Knock
Part Number: 10456146
$23.27 MSRP: $83.20
You Save: $59.93 (73%)
ADD TO CART
Product Specifications
- Other Name: SENSOR, Distributor (also Knock Sensor); ESC Sensor, Knock Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1995 Chevrolet Blazer | 1/2 TON, 2 DOOR, 4 DOOR | 6 Cyl 4.3L
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Chevrolet Blazer Sensor Assembly, Knock
Part Number: 55503494
$14.06 MSRP: $25.20
You Save: $11.14 (45%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Knock Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021 Chevrolet Blazer | HIGH COUNTRY/LTZ 4 DOOR SUV, LT 4 DOOR SUV, RS 4 DOOR SUV | 4 Cyl 2.0L
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Chevrolet Blazer Sensor Assembly, Knock
Part Number: 12663209
$4.16 MSRP: $7.55
You Save: $3.39 (45%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Knock Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2020-2021 Chevrolet Blazer | HIGH COUNTRY/LTZ 4 DOOR SUV, LT 4 DOOR SUV, RS 4 DOOR SUV | 4 Cyl 2.0L
View related parts
Chevrolet Blazer Sensor,Knock
Part Number: 10456287
Product Specifications
- Other Name: SENSOR, Distributor (also Knock Sensor); Control Module, ESC Sensor, Knock Sensor, Sensor
- Replaces: 10456017
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1994 Chevrolet Blazer | 1/2 TON | 6 Cyl 2.8L, 6 Cyl 4.3L, 8 Cyl 5.0L, 8 Cyl 5.7L, 8 Cyl 6.2L Diesel
View related parts
Chevrolet Blazer Knock, Sensor O/L
Part Number: 10456019
Product Specifications
- Other Name: SENSOR, Distributor (also Knock Sensor); Knock Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993-1994 Chevrolet Blazer | 1/2 TON
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Chevrolet Blazer Sensor Assembly, Knock
Part Number: 12590195
$23.64 MSRP: $42.39
You Save: $18.75 (45%)
Product Specifications
- Other Name: SENSOR, Distributor (also Knock Sensor); Knock Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005 Chevrolet Blazer | 2 DOOR, 4 DOOR | 6 Cyl 4.3L
View related parts
Chevrolet Blazer Sensor,Knock
Part Number: 10456082
Product Specifications
- Other Name: SENSOR, Distributor (also Knock Sensor); ESC Sensor, Knock Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994 Chevrolet Blazer | 1/2 TON | 6 Cyl 4.3L
View related parts
Chevrolet Blazer Sensor Assembly, Knock
Part Number: 10456218
Product Specifications
- Other Name: SENSOR, Distributor (also Knock Sensor); Knock Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1995 Chevrolet Blazer | 2 DOOR, 4 DOOR | 6 Cyl 4.3L
View related parts
Chevrolet Blazer Sensor,Knock
Part Number: 10456075
Product Specifications
- Other Name: SENSOR, Distributor (also Knock Sensor); Knock Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2000 Chevrolet Blazer | 2 DOOR, 4 DOOR | 6 Cyl 4.3L

Chevrolet Blazer Knock Sensor Parts Questions & Experts Answers

Sensor,Knock
10456146
Q: How to check and replace Camshaft Position Sensor,Coolant Temperature Sensor,Crankshaft Position Sensor,Intake Manifold Temperature Sensor,Knock Sensor,Oxygen Sensor,Vehicle Speed Sensor,Neutral Safety Switch,MAP Sensor and Throttle Position Sensor on Chevrolet Blazer,S10,GMC Jimmy and Sonoma?
A: Various engine sensors and components have checking procedures,the engine coolant temperature (ECT) sensor is a thermistor that changes resistance with temperature, and a failure in the circuit can cause trouble codes. The resistance should be measured when cold and warm while ensuring reference voltage from PCM is around 5.0 volts for the verification. Manifold Absolute Pressure (MAP) Sensor monitors changes in intake manifold pressure then varies its voltage output accordingly. Look at the reference voltage and signal voltage with the ignition on and engine off, and observe voltage changes as the engine's vacuum changes. Intake Air Temperature (IAT) Sensor acts as a thermistor where you can measure its resistance at different temperatures to make sure it changes as expected. Also, use a scan tool to monitor the IAT sensor for performance. The oxygen sensor in exhaust detects oxygen content which you can check its millivolt signal while warming up your engine. Check whether the oxygen sensor heater has correct voltage or not. Vehicle Speed Sensor (VSS) provides speed data to PCM which can be checked for reference voltage. Depending on the type of engine, Camshaft Sensor and Crankshaft Sensor should be checked for resistance and proper signal output. Finally, Knock Sensors detect engine knock which should be checked for reference voltage and resistance. If any component fails these checks, replacement may be necessary.