GM Released Software Update for Sierra and Silverado
Owners of newer GMC and Chevrolet pickups can now download a patch to improve audio and center display performance.
Updated on Oct. 10, 2026 in Trucks
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General Motors has issued over-the-air software update V661.20 for current-generation GMC Sierra and Chevrolet Silverado light-duty pickups. The update, which became available in October 2026, applies to trucks produced through the 2026 model year.
Why it matters
This update addresses specific performance issues related to the vehicle center display and sound system, ensuring that integrated electronics continue to function as intended. Owners of these light-duty trucks can expect better center screen stability and an enhancement to audio output following the install.
The V661.20 software patch is available for light-duty GMC Sierra and Chevrolet Silverado models produced through the 2026 model year. Users report that the update notably increases bass output in the audio system while addressing center display glitches.
The players
General Motors
A major automotive manufacturer that produces the GMC and Chevrolet brands and manages complex vehicle software ecosystems.
The details
To apply the software, the pickup must be parked and the ignition switched off. The installation process takes approximately 15 minutes to complete, during which time the center screen and audio system will be unavailable. Once the process is finished, the system automatically recalibrates to integrate the display fixes and audio enhancements.
Timeline
October 2026: General Motors released software update V661.20.
The Home Front
This release reflects the broader automotive trend of using over-the-air updates to resolve infotainment and performance issues without requiring a dealership visit. It highlights how digital maintenance is becoming as routine for vehicle owners as physical service intervals.
If you own a current-generation Sierra or Silverado, check your vehicle infotainment settings to initiate the update process while parked. Plan to leave the truck stationary for at least 15 minutes while the system installs the new software.
The takeaway
Maintaining modern vehicles often involves keeping onboard software current to ensure the best performance from your audio and display systems. Check your vehicle's update menu periodically to confirm that version V661.20 has been successfully installed.
Further reading
Learn more about maintaining your vehicle tech in the Trucks section.
Source note: This article includes information reported by GM Authority.
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