Code P0332 on 2002 Chevrolet Avalanche?

This error code indicates problem is faulty rear knock sensor.
Its due to the corrosion on 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.

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.
See the diagram below for more help.

1. 
   
2. 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.
3. 
   
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.

This procedure will help,to fix the problem.

----------For more car related problem troubleshooting:---

This are the sections, you can go through and click the link to read its troubleshooting.

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The car will not start?

http://schematicsdiagram.blogspot.com/2011/06/car-will-not-start.html

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Car will not crank?

http://schematicsdiagram.blogspot.com/2011/06/car-will-not-crank.html

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Car has no spark?

http://schematicsdiagram.blogspot.com/2011/06/car-has-no-spark.html

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How to troubleshoot car battery?

http://schematicsdiagram.blogspot.com/2011/06/how-to-troubleshoot-car-battery.html

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How to test starter solenoid?

http://schematicsdiagram.blogspot.com/2011/06/how-to-test-starter-solenoid.html

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How to test cars starter?

http://schematicsdiagram.blogspot.com/2011/06/how-to-test-cars-starter.html

How to replace starter in car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-replace-starter-in-car.html