How to replace the Knock Sensor (KS) on GMC Envoy?

Primarily, to replace the Knock Sensor (KS), first, lift and support the vehicle to the height where you can access the KS through the wheelhouse, and remove the left wheelhouse liner. Pull off engine wiring harness electrical connector from KS and remove KS retaining bolt and then take out KS from engine block. For installation, make sure to install back the KS and the retaining bolt on to the engine block with the electrical terminals at the rear; tightening the knock sensor (KS) bolt to 25 N.m (18 lb ft). Next, reconnect the engine wiring harness electrical hookup to the KS and re- install the left wheelhouse liner and finally lower the vehicle.

OEM GMC Envoy Knock Sensor

Engine Knock Sensor

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3 Knock Sensors found

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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 Questions & Experts Answers

Knock Sensor
12567446
Q: How to replace the Knock Sensor (KS) on GMC Envoy?
A:
Primarily, to replace the Knock Sensor (KS), first, lift and support the vehicle to the height where you can access the KS through the wheelhouse, and remove the left wheelhouse liner. Pull off engine wiring harness electrical connector from KS and remove KS retaining bolt and then take out KS from engine block. For installation, make sure to install back the KS and the retaining bolt on to the engine block with the electrical terminals at the rear; tightening the knock sensor (KS) bolt to 25 N.m (18 lb ft). Next, reconnect the engine wiring harness electrical hookup to the KS and re- install the left wheelhouse liner and finally lower the vehicle.