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Engine Power Reduced Message After ONSTAR Upgrade (CANADA Only) (PIT5442) — 2010 Hummer H3 Base, Automatic Service Manual

Engine Power Reduced Message After ONSTAR Upgrade (CANADA Only) (PIT5442)

Publication date: 2015-07-09
Reference number: PIT5442

ENGINE POWER REDUCED MESSAGE AFTER ONSTAR UPGRADE (CANADA ONLY)

ENGINE POWER REDUCED MESSAGE AFTER ONSTAR UPGRADE (CANADA ONLY)

TECHNICAL SERVICE BULLETIN

Reference Number(s): PIT5442, Date of Issue:  Jul 9, 2015
Affected Model(s): 2010-2015 All GM Passenger Cars and Trucks (With OnStar upgrade per latest version of Bulletin 15-08-44-001)

SERVICE INFORMATION

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.