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)
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).
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.
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.
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.
Tighten the knock sensor to 20 N·m(15 lb ft).
Part Number |
Description |
Qty |
---|---|---|
10456603 |
Sensor, Knock |
1 |
Parts are currently available from GMSPO.
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.