K 1500 Yukon Denali AWD V8-6.0L VIN U (2002)
Knock Sensor: All Technical Service Bulletins
Engine Controls - Spark Knock/MIL ON/ DTC P0332 Set
File In Section: 06 - Engine/Propulsion System
Bulletin No.: 02-06-04-023A
Date: June, 2002
TECHNICAL
Subject:
Audible Spark Knock (Detonation), MIL Illuminated, DTC P0332 Set (Replace Rear Bank Knock Sensor and RTV Area Around Sensor)
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, L09, L04)
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).
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.
1.
Remove the intake manifold. Refer to the Intake Manifold Replacement procedure in the Engine Controls sub-section of the appropriate Service
Manual.
2.
Remove the wiring harness assembly from the knock sensor.
