Bulletin No.: 06-06-01-014C
Date: June 25, 2008
with 3800 3.8L Series III V6 Engine (VINs K, 1, 2, 4, - RPOs L36, L67, L26, L32) or 3500 3.5L V6 Engine (VINs L, 8 RPO LX9) or 3400 3.4L V6 Engine (VIN E - RPO LA1) and Hydra-Matic(R) 4T65-E Transmission (RPOs MN7, M15)
This bulletin is being revised to update the pictures for better clarification. Please discard Corporate Bulletin Number 06-06-01-014B (Section 06 - Engine/Propulsion System).
Some customers may comment on a ticking or knocking type noise coming from the engine or transmission area.
Typically the noise is caused by either the transmission rear dust cover contacting the flexplate (refer to Corporate Bulletin Number 05-06-01-028) or a cracked flexplate (sometimes also referred to as a flywheel).
With the vehicle raised and supported on a suitable hoist, verify that the noise is coming from the flexplate area. If the noise is present, follow the procedure below. If the noise is not coming from the flexplate area, refer to Lower Engine Noise, Regardless of Engine Speed in SI.