2021 Corvette: Service Bulletin: #21-NA-053: Radio Software Version V155 Update - (Jun 3, 2021)


#21-NA-053: Radio Software Version V155 Update - (Jun 3, 2021)

Subject Radio Software Version V155 Update

This bulletin replaces PIC6425 and will replace PIT5791 for the models listed. Discard all previous versions of PIC6425 and PIT5791.


Brand:

Model:

Model Year:

VIN:

Engine:

Transmission:

from

to

from

to

Buick

Encore GX

2021

2021

Envision

Cadillac

CT4

2021

2021

CT5

XT4

XT5

XT6

Chevrolet

Blazer

2021

2021

Camaro

Corvette

Malibu

Silverado 1500

Silverado 2500HD/3500HD

Suburban

Tahoe

Trailblazer (VIN M)

GMC

Acadia

2021

2021

Sierra 1500

Sierra 2500HD/3500HD

Yukon

Yukon XL

 

Involved Region or Country

North America, Europe, Uzbekistan, Russia, Middle East, Israel, Palestine, Chile, Colombia, Ecuador, Paraguay, Peru, Japan, Cadillac Korea (South Korea), GM Korea Company, China, Thailand

Additional Options (RPOs)

Equipped with Infotainment Systems IOS, IOU or IOT

Condition

Some customers may comment on software related issues. Continuous improvement software updates are being released with improvements made in several areas. V155 contains over 100 improvements. Refer to V155 Most Notable Improvements section below.

Cause

The cause of the condition may be software anomalies.

Correction

A new radio software update, version V155, was released to service for vehicles equipped with Infotainment system RPO IOS, IOU or IOT. In addition to providing general robustness and stability enhancements, this update includes all enhancements from previous software version releases. This update can occur remotely through in-vehicle prompts from the radio display. However, some customers may decline the vehicle update, or the update may be unsuccessful. Along with the vehicles mentioned above, vehicles in unconnected markets, and fleet customers may need the dealer to reprogram the radio with the new software package.

Important: Some technicians are reporting that the radio remains on an older software version after the radio displays the software update completed successfully. It is important to ensure that the technician is inspecting the full information found within Build Number and not other rows of information on the same screen. This requires the user to locate the Build Number, and then select the Information icon (circled lower-case i) to see the full software version file name. In these radios, the build number may begin with a letter other than “V” but this is NOT the software version and is not unique to the software release.

Important: After pressing the information icon, review the full software version file name. In the middle of this long file name you see the V155 (or numerically higher if newer versions were released and installed).

V155 Most Notable Improvements

Important: Improvements will vary by model, build configuration, system, and sales region. Not all vehicles have all features.

Most notable improvements contained in this release may include:

Bluetooth

Climate

Energy App

HMI

IPC Interface

Media

Navigation

OnStar

Phone

Projection

Settings

System

Sirius XM

Translation (Non-GMNA)

Voice Recognition



Article ID: 1515
Created: June 4, 2021
Last Updated: June 4, 2021

Online URL: https://www.corvetteactioncenter.com/tech/knowledgebase/article/2021-corvette-service-bulletin-21-na-053-radio-software-version-v155-update-jun-3-2021-1515.html