Normal Characteristic - Clock Does Not Update Or Slow To Update (PIC5839C)

Publication date: 2015-04-27
Reference number: PIC5839C

NORMAL CHARACTERISTIC - CLOCK DOES NOT UPDATE OR SLOW TO UPDATE

TECHNICAL SERVICE BULLETIN

Reference Number(s): PIC5839C, Date of Issue: April 27, 2015

AFFECTED MODEL(S):

2014-2015 Buick Encore, LaCrosse, Regal, Verano Equipped with RPO UFU, UHQ, IO3, IO4, IO5 or IO6, Cadillac CTS (A body), ELR Equipped with RPO IO3, IO4, IO5, or IO6, Chevrolet Camaro, Corvette, Cruze, Equinox, Impala (1 body), Malibu, Orlando, Silverado (LD), SS, VOLT Equipped with RPO IO3, IO4, IO5, IO6, UFU, UHQ, RAO, or UY4, GMC Sierra (LD), Terrain Equipped with RPO UFU, UHQ, IO3, IO4, IO5 or IO6; 2013-2015 Cadillac ATS, SRX, XTS Equipped with RPO IO3, IO4, IO5, IO6, RAO, UA3, or UY4; 2015 Cadillac Escalade Equipped with RPO IO3, IO4, IO5, or IO6, Chevrolet Suburban, Tahoe, Silverado (HD) Equipped with RPO IO3, IO4, IO5 or IO6, GMC Sierra (HD), Yukon with Gen 9 Equipped with RPO IO3, IO4, IO5 or IO6

SUPERCEDES:

This PI was superseded to update Models. Please discard PIC5839B.

CONDITION/CONCERN

A customer may comment the clock is slow to update while driving.

This may occur with the clock auto set feature enabled. The clock receives information from the local cellular providers.

As you travel, the clock will update with the current time based on what the cellular provider is transmitting.

The clock information is sent by the OnStar module via the Low Speed GMLAN every six minutes by the OnStar module.

In certain situations, it may take longer for the time to update due to the cellular network not providing the updated time.

For example, when driving from one time zone to another, the tower connected to the vehicle is a "neighbor" to another in a different time zone.

This may cause a delay in providing the updated time. In rare instances, an ignition cycle may need to be performed in order for the correct time to be displayed.

RECOMMENDATION/INSTRUCTIONS

Please communicate to the customer this condition is a normal operating characteristic of their vehicle. Please share this information with the customer, including a copy of this message.