How to service the knock sensor on GMC Envoy?

Begin knock sensor service by lifting the vehicle next locate and remove the knock sensor's retaining bolt then detach the harness connector. Hold the knock sensor harness connector separate while you take out the retaining bolt securing the sensor. Next remove the specified knock sensor either number one or number two. The new knock sensor (1 or 2) needs to be mounted in place using the bolt followed by torque tightening to 25 N.m (18 lb ft) according to Service Precautions Component Fastener Tightening Notice. Proceed by making the knock sensor harness connector connection and completing vehicle descent.

How to replace the knock sensor on GMC Envoy?

The replacement process of the knock sensor starts with raising the vehcile. First remove the engine cover. Then disconnect the knock sensor harness connector before detaching the knock sensor retaining bolt . Proceed to take out the required knock sensor from the 1 or 2 position. When installing the knock sensor along with the bolt always apply a tight torque of 25 Nm (18 lb ft). Reconnect the knock sensor harness connector after lowering the vehicle.

OEM GMC Envoy Knock Sensor

Engine Knock Sensor

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GMC Envoy 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:
- 2005-2009 GMC Envoy | Denali, SLE, SLT | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS
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GMC Envoy Knock Sensor Part Number: 12567446
$27.17 MSRP: $51.00
You Save: $23.83 (47%)
Ships in 1-2 Business Days
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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 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS
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GMC Envoy 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 GMC Envoy | SLE, SLT | 6 Cyl 4.2 L GAS

GMC Envoy Knock Sensor

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The Knock Sensor in GMC Envoy vehicles is very essential for engine performance since the engine knock is wrong ignition timing. This device sends signals to the powertrain control module (PCM), thus enabling the PCM to vary the ignition timing with a view of preventing too much detonation. Usually, the knock sensors of GMC Envoy are piezoelectric, which makes signals from vibrations and pressure continually to find knocking signals. In more recent years, there have been even better developmental controls in knock sensing where the capability to seamlessly control ignition intervals for specific cylinders and also control boost pressure in cars with turbochargers has been deployed. This makes it possible to operate the engine to the "knock limit" and thus improve its performance yet with low octane fuels and this consequently reduces any likelihood of damage. This shows that there has been an strive to ensuring that the engine efficiency and duration is not affected depending on the driving modes.

GMC Envoy Knock Sensor Parts and Q&A

Knock Sensor
12567446
Q: How to service the knock sensor on GMC Envoy?
A:
Begin knock sensor service by lifting the vehicle next locate and remove the knock sensor's retaining bolt then detach the harness connector. Hold the knock sensor harness connector separate while you take out the retaining bolt securing the sensor. Next remove the specified knock sensor either number one or number two. The new knock sensor (1 or 2) needs to be mounted in place using the bolt followed by torque tightening to 25 N.m (18 lb ft) according to Service Precautions Component Fastener Tightening Notice. Proceed by making the knock sensor harness connector connection and completing vehicle descent.
Knock Sensor
12623730
Q: How to replace the knock sensor on GMC Envoy?
A:
The replacement process of the knock sensor starts with raising the vehcile. First remove the engine cover. Then disconnect the knock sensor harness connector before detaching the knock sensor retaining bolt . Proceed to take out the required knock sensor from the 1 or 2 position. When installing the knock sensor along with the bolt always apply a tight torque of 25 Nm (18 lb ft). Reconnect the knock sensor harness connector after lowering the vehicle.