Does any one have a pic of the rear knock sensor. So I know what I am looking for I keep getting the code for the rear knock sensor. I want to see it I need to clean the connection.

Thanks
David

 

I have no help with a pic but it is directly under your intake manifold. Just take the manifold off and there will be 2 knock sensors, I would replace the sensor that is throwing a code because you are already in there, and they are not all that expensive. The best price I found was on GMpartsdirect.com

 

This bulletin describes the problem that you are more htan likely having.

Document ID# 893793
2001 Chevrolet Corvette


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Subject: Audible Spark Knock (Detonation), MIL Illuminated, DTC P0332 Set (Replace Rear Bank Knock Sensor and RTV Area Around Sensor) #02-06-04-023A - (06/14/2002)



Models: 1998-2002 Chevrolet Camaro, Corvette

1998-2002 Pontiac Firebird

with 5.7L Engine (VIN G -- RPO LS1)

1999-2002 Chevrolet Silverado, Suburban, Tahoe

2002 Chevrolet Avalance

1999-2002 GMC Sierra, Yukon, Yukon XL

2002 Cadillac Escalade, Escalade EXT

with 4.8L, 5.3L or 6.0L Engine (VINs V, T, Z, N, U -- RPOs LR4, LM7, L59, LQ9, LQ4)




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This bulletin is being revised to add Cadillac Escalade and Cadillac Escalade EXT to the Models. Please discard Corporate Bulletin Number 02-06-04-023 (Section 6 -- Engine/Propulsion System).


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Condition
Some customers may comment on a mild to severe engine ping (commonly referred to as spark knock), usually worse during acceleration and/or an illuminated MIL. Upon investigation, the technician may find DTC P0332 set.

Cause
This condition may be the result of corrosion of the rear bank knock sensor due to water intrusion into the sensor cavity. This condition is more apparent on vehicles in which customers frequently wash the engine compartment.

Correction
Replace the rear bank knock sensor and build a dam (wall) around the sensor using RTV to divert water away from the sensor. Use the procedure and part number listed below.

Remove the intake manifold. Refer to the Intake Manifold Replacement procedure in the Engine Controls sub-section of the appropriate Service Manual.



Remove the wiring harness assembly from the knock sensor.



Remove the rear bank knock sensor.
Install the new rear bank knock sensor.
Tighten
Tighten the knock sensor to 20 N·m(15 lb ft).

Install the wiring harness assembly to the knock sensor.



Apply a bead of RTV silicone sealant approximately 9 mm (3/8 in) wide and 6 mm (1/4 in) high along the outside edge of the ridge on the engine block valley cover around the rear bank knock sensor. DO NOT form a complete circle. Leave the rear section open as shown.
From the underside of the intake manifold, completely remove the rear intake manifold seal (foam material).
Install the intake manifold. Refer to the Intake Manifold Replacement procedure in the Engine Controls sub-section of the appropriate Service Manual.
Parts Information
Part Number
Description
Qty

10456603
Sensor, Knock
1


Parts are currently available from GMSPO.

Warranty Information
For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time

J4437

(F-Car)
Sensor, Knock -- Replace
1.7 hrs

Add

(1998-1999 F-Car Only)
To Remove EGR
0.2 hr

J4437

(Y-Car)
Sensor, Knock -- Replace
1.6 hrs

J4437

(C/K-Truck)
Sensor, Knock -- Replace
1.5 hrs

Add

(C/K Truck Only)
With Three Piece Engine Covers
0.2 hr

Add

(All)
Diagnosis Time
0.3 hr

Add

(All)
To RTV Area Around Sensor and Remove Intake Manifold Seal
0.2 hr




GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


© Copyright General Motors Corporation. All Rights Reserved.


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Document ID# 893793
2001 Chevrolet Corvette

 

I agree with you Rich. Once the manifold is off (or at least moved out of the way), it's an easy replace.

01rc51: Just be sure to carefully squeeze the connector to release it if you use pliers, etc. It is easy to crack. You use your fingers but you have to squeeze pretty hard. Also make sure to torque new one to the proper (15 ft lbs) value.
The best pricing will probably come from Fichtner Chev or Gene Culley, not GM parts direct. GMPD tacks on a lot of shipping cost to make their profit.
HTH,
Robert

 

thanks for all the info will look into sat

 

Thanks for the feedback guys. Much appreciated! Jake..