PIP5264
Service Bulletin Details
Public Details for: PIP5264
This preliminary information communication provides information to the technician on the step to diagnose and repair vehicles that may have engine misfire and check engine light with any or all cylinder misfires only on deceleration. Techni
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Bulletin No.: PIP5264 Date: Feb-2015 Subject: Deceleration Misfire On All Cylinders 1400 RPM To 1800 RPM Diagnosis Models: 2004-2011 Cadillac STS 2004-2015 Cadillac CTS SRX 2013-2015 Cadillac ATS XTS 2005-2015 Buick Lacrosse Allure (Canada only) 2008-2015 Buick Enclave 2010-2015 Chevrolet Camaro 2011-2015 Chevrolet Captiva Sport 2015 Chevrolet Colorado 2008-2015 Chevrolet Equinox 2012-2015 Chevrolet Impala 2008-2012 Chevrolet Malibu 2009-2015 Chevrolet Traverse 2007-2015 GMC Acadia 2015 GMC Canyon 2010-2015 GMC Terrain 2007-2009 Pontiac G6 2008-2009 Pontiac Torrent 2007-2009 Saturn Aura 2007-2010 Saturn Outlook 2008-2010 Saturn Vue with 3.6 LY7, LFX, or LLT 2.8 LP1 3.0 LF1 or LFW The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI. Condition/Concern Some customers may comment about an engine misfire and check engine light with any or all cylinder misfires only on deceleration. Depending on the model year and engine RPO configuration, this may be the result of: – Debris in the serpentine belt or balancer pulley causing a jump and false misfire – Worn engine mounts causing a ground out concern and false misfire. Note: Do not confuse this with normal roughness and a few random misfire counts that are normal on these engines at the same speeds in park or neutral Recommendation/Instructions If this concern is encountered: 1 – Remove the accessory drive belt and drive or brake stall at signature RPM. If the concern is gone inspect for debris in the belt or pulleys causing a jump and false misfires – Use engine lift to unload the engine mounts and brake stall at signature RPM. If concern is gone then inspect for a ground out concern with the mounts causing false misfires. Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. 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 2