How to service the knock sensor on Chevrolet Astro?

First, disconnect the negative Battery Cable in order to service the Knock Sensor. Next, take off the engine cover, disconnect Knock Sensor harness connector and take out Knock Sensor. For installation apply the following step, start firstly with installation of the Knock Sensor and be sure that it is fixed to in order of 20 n.m (15 lb ft). Then reconnect the Knock Sensor harness connector and then reinstall the engine cover, and lastly reconnect the negative cable.

How to replace the Knock Sensor (KS) on Chevrolet Astro?

Before starting ks replacement work disconnect the negative Battery Cable according to the battery disconnect caution. Our replacement process starts with removing engine protection followed by disconnecting the Knock Sensor harness connector. Finish the knob sensor bolt installation followed by the removal of the Knock Sensor itself. Start by installing your Knock Sensor and your Knock Sensor bolt according to the component fastener tightening notice and apply 25 n.m (18 lb ft) torque to the sensor bolt before tightening it. Reconnect the Knock Sensor harness connector before reinstalling the engine cover and lastly reconnect the negative Battery Cable.

OEM Chevrolet Astro Knock Sensor

Engine Knock Sensor

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4 Knock Sensors found

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Chevrolet Astro Knock Sensor Part Number: 21024981
$32.61 MSRP: $61.25
You Save: $28.64 (47%)
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Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Replaced by: 19434673
- Replaces: 21024729
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2005 Chevrolet Astro | Base, LS, LT | 6 Cyl 4.3 L GAS
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Chevrolet Astro Knock Sensor Part Number: 10456288
$45.57 MSRP: $92.57
You Save: $47.00 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor); ESC Sensor; Sensor, Engine Crankcase Ventilator
- Replaces: 10456018
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1992 Chevrolet Astro | Base, CL, CS, LT | 4 Cyl 2.5 L GAS, 6 Cyl 4.3 L GAS
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Chevrolet Astro Knock Sensor Part Number: 10456146
Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor); ESC Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993-1995 Chevrolet Astro | Base, CL, CS, LT | 6 Cyl 4.3 L GAS
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Chevrolet Astro Knock Sensor Part Number: 10456075
Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2000 Chevrolet Astro | Base, LS, LT | 6 Cyl 4.3 L GAS

Chevrolet Astro Knock Sensor

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The Knock Sensor used in Chevrolet Astro automobiles helps in the performance of the automobile engine by helping in detecting an engine knock, a phenomenon characterized by an incorrect ignition timing. This device relays information to the powertrain control module (PCM) to alter the ignition time to reduce onslaught of excessive detonation. The Chevrolet Astro implements a piezoelectric knock sensor whose function is to detect any vibrations and integrate them into electrical signals for the pressure peak monitoring of knocking. Some of the years' Chevrolet Astro models have used sophisticate knock sensor technologies like the ability to vary the ignition timing to particular cylinders and vary boost pressure according to the design of the engine. This results in the premier possible engine operation at or slightly above the "knock-limit" and higher performance, even on lower octane fuels will not harm the engine. Most car makers have improved the Knock Sensor in Chevrolet Astro in various ways showing that there is gradual improvement in the various engine management systems within vehicles today.

Chevrolet Astro Knock Sensor Parts and Q&A

Knock Sensor
10456075
Q: How to service the knock sensor on Chevrolet Astro?
A:
First, disconnect the negative Battery Cable in order to service the Knock Sensor. Next, take off the engine cover, disconnect Knock Sensor harness connector and take out Knock Sensor. For installation apply the following step, start firstly with installation of the Knock Sensor and be sure that it is fixed to in order of 20 n.m (15 lb ft). Then reconnect the Knock Sensor harness connector and then reinstall the engine cover, and lastly reconnect the negative cable.
Knock Sensor
21024981
Q: How to replace the Knock Sensor (KS) on Chevrolet Astro?
A:
Before starting ks replacement work disconnect the negative Battery Cable according to the battery disconnect caution. Our replacement process starts with removing engine protection followed by disconnecting the Knock Sensor harness connector. Finish the knob sensor bolt installation followed by the removal of the Knock Sensor itself. Start by installing your Knock Sensor and your Knock Sensor bolt according to the component fastener tightening notice and apply 25 n.m (18 lb ft) torque to the sensor bolt before tightening it. Reconnect the Knock Sensor harness connector before reinstalling the engine cover and lastly reconnect the negative Battery Cable.