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radio issue help 8" w/ XM

flewpastu
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flewpastu Enthusiast

flewpastu

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Just Got my 2021 Silverado LT 2wd had it about a week when my wife and i took a trip a few hours away , 2 hours into it i heard a faint high pitch whine (2 seconds ) then radio went blank still heard music playing but had no control even the HVAC started blowing heat until i turned off auto and set manual temp i say it went blank but could tell there was some slight back light ,,, i pulled over shut the vehicle off and exited the truck for a few minutes the music still played and had 0 control over any selection Vol, station etc , i continued on my trip not going to let that ruin our get away figured i keep a jump box with me anyway ,, got to the hotel unloaded truck the about an hour later i went out and it had shut off the next morning was like it never happened and it hasnt happened since but i also havent driven longer than an hour or so since then either i checked for OTA updates says none a few days later i saw theres an update for the radio made an appt at the dealer i worked at for 20+ years as a shop foreman over 35yrs master tech for chevy but now i work for the Govt (still a mechanic tho) theyve told me i have the latest update but ordered a center stack because its a common fault, 1 all i want is for them to update the radio before someone tears my dash apart and replace a part with a guaranteed used referb part that may not be faulty

lt

flewpastu Enthusiast

flewpastu

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I saw PI bulletin  PIC6425b that addressed many concerns across the GM line up and saw software v152 as the latest in the bulletin so I checked mine and even tho theyve told me i have the latest i'm at V135 with a date of 10/14/2019 the problem is since i left that dealership many of the techs that knew what they were doing have also left and from what i'm told the most of the techs are from KIA brought over with a new MGR

anyway my next option is to contact some old friends at another chevy dealership and see if i can get them to update the radio BTW the back up camera worked normal when the radio quit

 

my other concern is the truck has the 8" radio with XM no Nav , my window sticker says 8" radio with XM  but when i scan the QR code for the option label it comes back as the IOR radio which i think is the non XM 7" radio 

the truck was purchased new early feb 2021 no mods , i did how ever add a dash cam last week long after the radio concern because i was waiting to get my windows tinted 

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