How to service and repair the knock sensor on GMC Jimmy?

The Knock Sensor needs repair which starts by disconnecting the Spark Plug Wires and ignition coil wire from the Distributor before moving on to detach the cmp sensor harness connector from the Distributor. First remove the Distributor Cap screws while maintaining observation of the rotor alignment relative to the Distributor base to prevent dtc p1345 code generation. Begin Distributor service by removing the mounting bolt and associated Distributor assembly while discarding the gasket. By utilizing the j 35748 oil pressure sending unit socket disconnect the engine oil pressure sensor harness connector then remove the engine oil pressure sender. Begin by detaching both the Knock Sensor harness connector followed by the Knock Sensor itself. Start by installing the Knock Sensor followed by tightening it to 20 n.m (15 lb ft). Attach the Knock Sensor harness connector after you install the engine oil pressure sender with the j 35748 oil pressure sending unit socket while tightening it to 30 n.m (22 lb ft). Reattach the engine oil pressure sensor harness connector. Make sure the rotor occupies its factory alignment with the Distributor base before adding the Distributor assembly with a fresh Distributor gasket. Fasten the Distributor mounting bolt to 25 n.m (18 lb ft), then install and tighten the Distributor Cap screws to 2.4 n.m (21 lb in). Complete the wiring process by attaching the cmp sensor harness connector and both Spark Plug Wires accompanied by the ignition coil wire.

OEM GMC Jimmy Knock Sensor

Engine Knock Sensor

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GMC Jimmy 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 GMC Jimmy | Diamond Edition, SL, SLE, SLS, SLT | 6 Cyl 4.3 L GAS
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GMC Jimmy Knock Sensor Part Number: 10456018
$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)
- Replaced by: 10456288
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1990-1991 GMC Jimmy | Base, Sierra Classic | 8 Cyl 5.7 L GAS
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GMC Jimmy 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:
- 1995 GMC Jimmy | Base, SL, SLE, SLS, SLT | 6 Cyl 4.3 L GAS
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GMC Jimmy Knock Sensor Part Number: 10456218
Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1995 GMC Jimmy | Base, SL, SLE, SLS, SLT | 6 Cyl 4.3 L GAS
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GMC Jimmy 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 GMC Jimmy | Base, Diamond Edition, Envoy, SL, SLE, SLS, SLT | 6 Cyl 4.3 L GAS

GMC Jimmy Knock Sensor

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The Knock Sensor used in GMC Jimmy is significantly used to monitor engine knock; this is a phenomenon that takes place when the ignition timing is off. It communicates with the powertrain control module (PCM) and allows for modification of the ignition timing so as to reduce excess detonation. Usually, the knock sensors used in GMC Jimmy models are the piezoelectric ones that constantly can convert the pressure pulses, typical for knocking, into electrical signals. Through the years, there have been improvements in the design of knock sensors such that it is possible to tweak the ignition timing for each cylinder and there is even the capacity to control boost pressure in some designs. This in turn provides for the optimal operation near the "knock limit," improving the performance with lower octane fuels and at the same time reducing the possibility of damage. The aspect of integration of such systems is evident as a transition of engine management approaches in GMC Jimmy vehicles.

GMC Jimmy Knock Sensor Parts Questions & Experts Answers

Knock Sensor
10456075
Q: How to service and repair the knock sensor on GMC Jimmy?
A:
The Knock Sensor needs repair which starts by disconnecting the Spark Plug Wires and ignition coil wire from the Distributor before moving on to detach the cmp sensor harness connector from the Distributor. First remove the Distributor Cap screws while maintaining observation of the rotor alignment relative to the Distributor base to prevent dtc p1345 code generation. Begin Distributor service by removing the mounting bolt and associated Distributor assembly while discarding the gasket. By utilizing the j 35748 oil pressure sending unit socket disconnect the engine oil pressure sensor harness connector then remove the engine oil pressure sender. Begin by detaching both the Knock Sensor harness connector followed by the Knock Sensor itself. Start by installing the Knock Sensor followed by tightening it to 20 n.m (15 lb ft). Attach the Knock Sensor harness connector after you install the engine oil pressure sender with the j 35748 oil pressure sending unit socket while tightening it to 30 n.m (22 lb ft). Reattach the engine oil pressure sensor harness connector. Make sure the rotor occupies its factory alignment with the Distributor base before adding the Distributor assembly with a fresh Distributor gasket. Fasten the Distributor mounting bolt to 25 n.m (18 lb ft), then install and tighten the Distributor Cap screws to 2.4 n.m (21 lb in). Complete the wiring process by attaching the cmp sensor harness connector and both Spark Plug Wires accompanied by the ignition coil wire.