PIP5122A

Bulletin No.: PIP5122A
Date: Jun-2013
Subject:
Pop Noise From Fuel Tank After a Cold Start or EVAP Purge Event (Equinox / Terrain)
Models:
2010 -2014 Chevrolet Equinox
2010-2014 GMC Terrain
This PI was superseded to update recommended field. Please discard PIP5122.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
Intermittently customers may comment about a pop or multiple popping noises from the rear of the vehicle shortly after a cold start or EVAP purge event.
Recommendation/Instructions
The technician should be able to duplicate the concern by commanding a purge and seal on the EVAP system using GDS2. As the vacuum reaches 3 to 5
inches, the pop/popping noise should be duplicated. The cause for this concern is the auxiliary fuel module in the left side of the fuel tank changing height
(spring loaded leg) as the fuel tank collapses slightly.
The part number on the box of the auxiliary fuel module has not changed but the auxiliary fuel module inside of the box has. After ordering the auxiliary fuel
module, remove it from the box and verify the letters "PPA" are casted into the top of the fuel module flange. This is the revised auxiliary fuel module designed to
correct the pop/popping noise. The original auxiliary fuel module has "POM" casted into the flange.
(1) Flange location
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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.
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