PIT5442

Bulletin No.: PIT5442
Date: Jul-2015
Subject:
Engine Power Reduced Message After OnStar Upgrade (Canada Only)
Models:
2010-2015 All GM Passenger Cars and Trucks
(With OnStar upgrade per latest version of Bulletin 15-08-44-001)
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
A dealer technician may notice that after the OnStar 3G/4G Canada Upgrade per the latest version of Bulletin 15-08-44-001, some vehicles may display “Engine
Power Reduced” on the DIC but engine performance is not affected and the Check Engine Light will not be illuminated.
This issue may occur immediately after an OnStar blue button press configuration or soon after and the concern may cause the vehicle to set unrelated false
DTC's.
Recommendation/Instructions
If this concern is experienced, park the vehicle in an outdoor area that has good cellular coverage and call GM OnStar TAC @ 1-800-263-7740 prompt 4 from a
cell phone while in the vehicle.
Note: Please DO NOT replace any parts for this concern
Warranty Information
For vehicles repaired under warranty, please refer to the latest version of bulletin 06-08-47-001 for warranty information on control module reset/configuration
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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