Need Service Bulletin

c03camson · August 1, 2012

I have a 2012 Cheverolet Silverado Duramax 6.6 and am looking for a copy of the service bulletin that talks about the "typerwriter click" sound coming from the engine. Can you help me? Thanks

gmtech4 · August 2, 2012

so are ya gonna present it to the service manager ?

c03camson · August 2, 2012

I have no service manager to present it to. Just wondering if it says take it back to the dealer or its normal.

gmtech4 · August 3, 2012

i looked thru all prelim and tech bulletins and could not find it ,,,,i saw US bulletins so unsure if candian only is listed or both

sorry

newdude · August 3, 2012

#02-06-01-022M is the current version, written to include model years 2001-2013.

This link here has the bulletin, and is from around 03-04 but is worded the same except for the model years listed in it.

http://www.dieselplace.com/forum/showpost.php?p=1054&postcount=1

Z45 · August 3, 2012

fyi...

File In Section: 06 - Engine/Propulsion System

Bulletin No.: 02-06-01-022A

Date: November, 2002

Subject:Information on Engine Ticking Noise

Models:2001-2011 Chevrolet Silverado

2003-2009 Chevrolet Kodiak C4500/C5500 Series

2006-2011 Chevrolet Express Vans

2001-2011 GMC Sierra

2003-2009 GMC TopKick C4500/C5500 Series

2006-2011 GMC Savana Vans

Equipped with Duramax Diesel Engine (RPOs LBZ, LB7, LLY, LMM)

Please Refer to GMVIS

This bulletin is being revised to add the 2011 model year. Please discard Corporate Bulletin Number 02-06-01-022J (Section 06 - Engine/Propulsion System).

Some of the above vehicles may exhibit a random ticking noise that is most audible on an engine with a coolant temperature of 70°C (158°F) or higher and from idle to approximately 1500 RPM. The noise usually is most noticeable at the rear of the driver's side front wheel well. Customers may also comment about hearing a tick noise inside the vehicle at idle such as when sitting at a drive through window. All 6600 Duramax diesel engines have this condition; however, some are more audible than others. Engine build variation from engine to engine contributes to differences in perceived volume. All Duramax engines are manufactured to very close tolerances to meet the durability and reliability standards.

This noise is caused by the relationship of the engine cylinder block, crankshaft journals, bearing inserts and the oil film. This relationship may allow a vibration that resonates through the cylinder block and is heard as a metallic ticking noise. The noise could be described as an irregular ticking or clacking sound, like random typing on a mechanical typewriter.

This condition has been present in diesel engines produced for the last 20 or more years. The overall noise reduction in engines produced today makes this noise seem new when, in fact, it was masked by other noises in the past. Many manufacturers such as Isuzu, Hino, Mitsubishi, and Nissan report a similar condition in their diesel engines. Testing and engine teardowns with this condition reveal no condition that would affect reliability or durability of this engine.

Dealers should not attempt to compare any customer vehicles exhibiting this noise with other similar vehicles as the noise is different from vehicle to vehicle and this may lead to the incorrect conclusion that the vehicle has a condition. This noise is a normal operating characteristic of the engine. This noise has no short or long term effects on the engine. Do not attempt repairs for this noise.

Important: Replacing the engine or internal components for this noise will not reduce or eliminate the noise.

Please share the information found in this bulletin with customers who inquire about this condition. In the event they have additional questions or concerns, please advise them to contact Customer Assistance at the numbers listed below for further information.

Division

Number

Deaf, Hearing Impaired or Speech Impaired*

Chevrolet

1-800-222-1020

8:00 AM - 11:00 PM (EST)

1-800-833-2438

8:00 AM - 11:00 PM (EST)

GMC

1-800-462-8782

8:00 AM - 11:00 PM (EST)

1-800-462-8583

8:00 AM - 11:00 PM (EST)

Canada

1-800-263-3777

(English)

1-800-263-7854

(French)

7:30 AM - 11:30 PM (EST) (Mon-Fri)

7:30 AM - 6:00 PM (EST) (Sat)

1-800-263-3830

7:30 AM - 11:30 PM (EST) (Mon-Fri)

7:30 AM - 6:00 PM (EST) (Sat)

*Utilizes Telecommunication Devices for the Deaf/Text Telephones (TDD/TTY)

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.