PIC5650B

Bulletin No.: PIC5650B
Date: Jun-2015
Subject:
Diagnostic Tip - Security Light On Intermittently / No Crank/No Start Or Start Stall And Keyless Access
Vehicles May Display No Remote/Fob Detected
Models:
2008 - 2015 Buick Enclave
2010 - 2015 Buick LaCrosse
2011 - 2015 Buick Regal
2012 - 2015 Buick Verano
2013 – 2015 Cadillac ATS
2008 - 2015 Cadillac CTS
2007 - 2011 Cadillac DTS
2007 - 2015 Cadillac Escalade Models
2010 - 2015 Cadillac SRX
2007 - 2011 Cadillac STS
2007 - 2013 Chevrolet Avalanche
2011 - 2015 Chevrolet Cruze
2010 - 2015 Chevrolet Equinox
2007 - 2015 Chevrolet Silverado, Suburban, Tahoe
2012 - 2015 Chevrolet Sonic
2009 - 2015 Chevrolet Traverse
2007 - 2015 GMC Acadia
2010 - 2015 GMC Terrain
2007 - 2010 Saturn Outlook
2007 - 2015 GMC Sierra and Yukon Models
This PI was superseded to update Models and Years. Please discard PIC5650A
Condition/Concern
A customer may comment that they may have an intermittent no crank, no start, or start stall concern with the security light coming on. Upon diagnosis the
dealer technician may find DTC's B3055, B3060, and/or B3935. In most cases, the dealer cannot duplicate the customer's concern.
It is also possible on vehicles equipped with passive entry/start (RPO's ATH and/or BTH) a customer may exhibit a concern with passive entry inoperative
and/or no fob detected message, but will start with the fob in the fob pocket.
With the advancements in today's technology there has been a great increase in the number of RFID (Radio Frequency Identification Devices) found across
many communities, business, and automobiles. The most common devices found are: vehicle immobilizer key from other vehicles, keyless access transmitters
from other vehicles, interstate/bridge toll passes, gate passes, community/parking access cards, fuel station speed passes, and building access swipe cards/
transponder devices. See images below for examples of RFID devices
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Recommendation/Instructions
Important: Do not replace any parts for this concern prior to duplicating the concern and reviewing the following information
It is possible that a RFID device may interfere with the vehicle's Passkey theft system. The range of the interference can vary based on the strength of the
RFID which can affect the key to exciter module communication. All sets of keys should be inspected for such RFID devices. The customer may be removing
the RFID device, from the key ring, when dropping the vehicle off for service. If you are unable to duplicate the concern review this information with the
customer and ask if they use any search RFID devices. These RFID devices will need to be removed from the key ring.
Also, verify the vehicle owner is not inducing the concern by flipping the key while cranking, see the latest version of PIT5030 for vehicle that apply.
For vehicles with passive entry/start, it is possible to get RFI from transponders or other frequency emitting devices in the area. An RFI meter is available from
the aftermarket that can be utilized as an aid to locate the stray RFI signals, See Photo Below For image of the meter.
Important: Dealer should also direct their customers to the appropriate section in the Owner manuals that references that the device complies with Part 15 of
the FCC Rules. Examples, of where this info may be found depend on the model and/or year. This may be found under Immobilizer Operation, Keyless Entry,
Keyless Access, or Radio Frequency Statement sections.
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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WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
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