07-06-04-025J
Service Bulletin Details
Public Details for: 07-06-04-025J
This informational bulletin was created to inform the technician of cold start ticking noises in the engine compartment may be caused by the fuel pump and/or the fuel injectors and no
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File in Section: Bulletin No.: Service Bulletin Date: 06 - Engine 07-06-04-025J July, 2014 INFORMATION Subject: Information on Clicking/Ticking Sound/Noise Heard During Cold Start Models: 2009-2015 Buick Enclave 2010-2015 Buick LaCrosse 2008-2011 Cadillac STS 2008-2015 Cadillac CTS 2010-2015 Cadillac SRX 2013-2015 Cadillac ATS, XTS 2009-2015 Chevrolet Traverse 2010-2015 Chevrolet Camaro, Captiva, Equinox 2011-2015 Chevrolet Caprice PPV 2012-2015 Chevrolet Impala Limited 2014-2015 Chevrolet Impala 2009-2015 GMC Acadia 2010-2015 GMC Terrain 2009-2010 Saturn OUTLOOK Equipped with 3.0L or 3.6L VVT Direct Injection V6 Engine (VINs G, D, 5, V, Y, 3 – RPOs LF1, LFW, LLT, LFX) This bulletin has been revised to add the 2015 Model Year. Please discard Corporate Bulletin Number 07-06-04-025I. Do This Don't Do This Inform the customer that this is normal operation of the high pressure fuel pump and injectors. DO NOT replace the high pressure fuel pump and/or injectors. The 3.0L and 3.6L SIDI engines use a direct injection fuel system that operates at very high fuel pressures. A direct injection fuel system produces a rapid clicking and ticking sound that can be heard from the engine compartment. The sound is more evident when outside around the vehicle or when the hood is open. The sound is more noticeable during idle and is more frequent during a cold start, but lessens once the engine is warm. The rapid ticking noise on cold start up is the fuel pump (located on the rear of the left cylinder head) building up high fuel pressure. When the engine warm-up is completed, the high pressure fuel pump will continue to tick at a lower rate of approximately one tick per second during idle. The clicking sound is the fuel injectors pulsing on and off under higher fuel pressures. This sound is a normal characteristic of Direct Injection Fuel high pressure fuel system. DO NOT attempt to repair or replace any parts for this kind of clicking or ticking concern. The clicking or ticking sound is not indicative of any concerns with the engine or the vehicle. You may wish to give the customer a copy of this bulletin. 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. Copyright 2014 General Motors LLC. All Rights Reserved. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION