How to service the knock sensor on Chevrolet Astro?

Detach the negative Battery Cable as the first step to service the Knock Sensor. Start by removing the engine cover and then disconnect the Knock Sensor harness connector . Disassemble the process by first taking off the Knock Sensor bolt followed by the removal of the Knock Sensor. Install the Knock Sensor first then fasten it with the Knock Sensor bolt while setting the torque to 25 n.m (18 lb ft). Service of the Knock Sensor begins by connecting the negative Battery Cable and continues with disconnecting the Knock Sensor harness connector followed by reinstalling the engine cover and completing the sequence by reconnecting the negative Battery Cable.

OEM Chevrolet Astro Knock Sensor

Engine Knock Sensor

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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
$47.98 MSRP: $97.45
You Save: $49.47 (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 Questions & Experts Answers

Knock Sensor
21024981
Q: How to service the knock sensor on Chevrolet Astro?
A:
Detach the negative Battery Cable as the first step to service the Knock Sensor. Start by removing the engine cover and then disconnect the Knock Sensor harness connector . Disassemble the process by first taking off the Knock Sensor bolt followed by the removal of the Knock Sensor. Install the Knock Sensor first then fasten it with the Knock Sensor bolt while setting the torque to 25 n.m (18 lb ft). Service of the Knock Sensor begins by connecting the negative Battery Cable and continues with disconnecting the Knock Sensor harness connector followed by reinstalling the engine cover and completing the sequence by reconnecting the negative Battery Cable.