Weird
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Intermediate
Joined: Aug 2013
Posts: 46
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From: Santa Fe New Mexico
Weird
Intertcity delivered my 2020 3lt htc Tuesday at 5 pm. Tried it out on Wednesday - everything fine, except NO SOUND. No radio, no warning chimes, no directional light clicker, etc. etc. Decided to bring it in after the holidays. Took it out today, and as the odometer registered 100 miles (coincidence?) a pre-set 75mph chime sounded. Suddenly everything worked - radio, directional clicker, chimes, voice directions on navigation, etc. Thanks, Santa.
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Dec 26, 2020, 09:34 AM
Instructor
Joined: Mar 2020
Posts: 169
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From: Mill Creek, WA
Intertcity delivered my 2020 3lt htc Tuesday at 5 pm. Tried it out on Wednesday - everything fine, except NO SOUND. No radio, no warning chimes, no directional light clicker, etc. etc. Decided to bring it in after the holidays. Took it out today, and as the odometer registered 100 miles (coincidence?) a pre-set 75mph chime sounded. Suddenly everything worked - radio, directional clicker, chimes, voice directions on navigation, etc. Thanks, Santa.
LINK: Rick Conti YouTube, GOTO time marker 4:05:
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Congrats on your new C8 and hope it was just a glitch in the system.
Instructor
Joined: Mar 2020
Posts: 169
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From: Mill Creek, WA
Intertcity delivered my 2020 3lt htc Tuesday at 5 pm. Tried it out on Wednesday - everything fine, except NO SOUND. No radio, no warning chimes, no directional light clicker, etc. etc. Decided to bring it in after the holidays. Took it out today, and as the odometer registered 100 miles (coincidence?) a pre-set 75mph chime sounded. Suddenly everything worked - radio, directional clicker, chimes, voice directions on navigation, etc. Thanks, Santa.
LINK: Rick Conti YouTube, GOTO time marker 4:05:
Melting Slicks
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From: Not too far from MacMulkin
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@R & K C8 This is useful information about Transport Mode, especially since I can find nothing about it in the owner's manual.
Instructor
Joined: Mar 2020
Posts: 169
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From: Mill Creek, WA
@R & K C8 This is useful information about Transport Mode, especially since I can find nothing about it in the owner's manual.
@johnodrake - I seem to remember a discussion on how to re-engage "Transport Mode" for owners who trailer their C8's, but I don't remember exactly where I saw that discussion.
Amazing all the stuff I got to learn about while patiently waiting for "our train to come in" with our 2020 C8. -Rick
Last edited by R & K C8; Dec 26, 2020 at 11:40 AM. Reason: added response to @johnodrake
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From: Lakewood Ranch, FL
@/Bear/ & @manecda - Thank you both, I was just sharing a wild guess on what @2014greenstingray might have experienced. The "Transport Mode" notification on the Driver Information Center (DIC) display should have been really obvious, but he and the Dealer PDI Tech might have been too caught-up in the delivery moment to notice it. I guess "Transport Mode" isn't in the Owners Manual because it is disengaged at the Dealer during PDI, so the owner doesn't ever have to worry about.
@johnodrake - I seem to remember a discussion on how to re-engage "Transport Mode" for owners who trailer their C8's, but I don't remember exactly where I saw that discussion.
Amazing all the stuff I got to learn about while patiently waiting for "our train to come in" with our 2020 C8. -Rick
@johnodrake - I seem to remember a discussion on how to re-engage "Transport Mode" for owners who trailer their C8's, but I don't remember exactly where I saw that discussion.
Amazing all the stuff I got to learn about while patiently waiting for "our train to come in" with our 2020 C8. -Rick
Safety Car
Joined: Aug 2004
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From: IL / FL .
Start car, activate hazard flashers, press and hold start button.
To de-activate, repeat the process.
I haven’t tried it yet.
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From: Bonneville Salt Flats
Welcome to what is essentially a computer on wheels... and, they can and do sometimes glitch. You may see the same issue tomorrow or not in 20 years (the latter as happened with one on my C5). ENJOY! 
Instructor
Joined: Mar 2020
Posts: 169
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From: Mill Creek, WA
.Out of curiosity, if someone can activate "Transport Mode" on their C8 (the earlier video showed a long-ish start button hold-time until the notification appeared on the DIC) and check if items such as "...radio, directional clicker, chimes, voice directions on navigation, etc...." are inoperative/silent, then that was probably what happened earlier to OP @2014greenstingray . -Rick
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From: Lakewood Ranch, FL
Transport Mode is enabled by activating the hazard flashers, applying the brake pedal, and then turning the ignition key to the start position or pushing the ignition mode switch with the foot on the brake for greater than 15 seconds. The mode is disabled by repeating the previous process. The DIC (if equipped) will display Transport Mode On when enabled and Transport Mode Off when disabled. For vehicles not equipped with a DIC, the battery indicator light will constantly flash on the instrument cluster when Transport Mode is On. This feature can be used as many times as necessary if the vehicle is to be stored for an extended period of time.
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From: Not too far from MacMulkin
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Thanks. From the Bulletin
Transport Mode is enabled by activating the hazard flashers, applying the brake pedal, and then turning the ignition key to the start position or pushing the ignition mode switch with the foot on the brake for greater than 15 seconds. The mode is disabled by repeating the previous process. The DIC (if equipped) will display Transport Mode On when enabled and Transport Mode Off when disabled. For vehicles not equipped with a DIC, the battery indicator light will constantly flash on the instrument cluster when Transport Mode is On. This feature can be used as many times as necessary if the vehicle is to be stored for an extended period of time.
Transport Mode is enabled by activating the hazard flashers, applying the brake pedal, and then turning the ignition key to the start position or pushing the ignition mode switch with the foot on the brake for greater than 15 seconds. The mode is disabled by repeating the previous process. The DIC (if equipped) will display Transport Mode On when enabled and Transport Mode Off when disabled. For vehicles not equipped with a DIC, the battery indicator light will constantly flash on the instrument cluster when Transport Mode is On. This feature can be used as many times as necessary if the vehicle is to be stored for an extended period of time.
I suppose if you're storing for the winter, you'd still want a battery tender on it, but with Transport Mode activated, it may be less necessary.
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Very useful information here for sure
Instructor
Joined: Mar 2020
Posts: 169
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From: Mill Creek, WA
Thanks. From the Bulletin
Transport Mode is enabled by activating the hazard flashers, applying the brake pedal, and then turning the ignition key to the start position or pushing the ignition mode switch with the foot on the brake for greater than 15 seconds. The mode is disabled by repeating the previous process. The DIC (if equipped) will display Transport Mode On when enabled and Transport Mode Off when disabled. For vehicles not equipped with a DIC, the battery indicator light will constantly flash on the instrument cluster when Transport Mode is On. This feature can be used as many times as necessary if the vehicle is to be stored for an extended period of time.
Transport Mode is enabled by activating the hazard flashers, applying the brake pedal, and then turning the ignition key to the start position or pushing the ignition mode switch with the foot on the brake for greater than 15 seconds. The mode is disabled by repeating the previous process. The DIC (if equipped) will display Transport Mode On when enabled and Transport Mode Off when disabled. For vehicles not equipped with a DIC, the battery indicator light will constantly flash on the instrument cluster when Transport Mode is On. This feature can be used as many times as necessary if the vehicle is to be stored for an extended period of time.
And as I mentioned before, I remember reading that "Transport Mode" could also be useful when towing a C8 because it apparently deactivates the alarm's motion/incline sensors to keep the alarm from triggering during the tow.
Bottom-line is that "Transport Mode" is a very handy mode/feature for all C8 Owners to be aware of... thanks for everyone's contributions.
-Rick
Last edited by R & K C8; Dec 27, 2020 at 10:56 AM. Reason: added spacing to improve readability
Thread Starter
Intermediate
Joined: Aug 2013
Posts: 46
Likes: 13
From: Santa Fe New Mexico
Good idea, but apparently not the answer. The TRANSPORT MODE message was not - is not- displayed. Took car out for 4-hr trip on Friday, and it is silent again (entire trip). I don't normally name my cars, but I'm calling this one Harpo (Horn works, otherwise silent). Sent message to MacMulkin asking for suggestions before I take it to local dealership for warranty repair. All systems work (except without sound). Loose connection to speakers? Hope this does not mean inside dash must be disassembled to get at something.
@2014greenstingray - A wild guess here, but perhaps your C8 was still in "Transport Mode" (reduces electrical power and other settings for shipping, see link below) which was not deactivated during PDI and then it automatically "timed-out" at 100-miles as you experienced. That's my guess and possibly something to explore if others experience a similar situation immediately after their C8 delivery. -Rick
LINK: Rick Conti YouTube, GOTO time marker 4:05: 2020 CORVETTE is the INDY 500 PACE CAR & TAKING YOUR CAR OUT OF TRANSPORT MODE - YouTube )
LINK: Rick Conti YouTube, GOTO time marker 4:05: 2020 CORVETTE is the INDY 500 PACE CAR & TAKING YOUR CAR OUT OF TRANSPORT MODE - YouTube )
Instructor
Joined: Mar 2020
Posts: 169
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From: Mill Creek, WA
@2014greenstingray - Thank you for reporting back and sorry to hear that your C8 is still giving you the silent treatment... LOL on adopting the nick-name "Harpo"... too funny, and hopefully the fix for your C8 will be an easy one. A small up-side of your situation is forum folks got the learn a lot more about "Transport Mode", just sorry it wasn't the easy explanation/fix for "Harpo's" condition.
Best wishes for getting "Harpo's" voice/sounds back soon, although your C8 might need a new nick-name as a result .
-Rick
BTW / off-topic: we are NM "ex-pats", so we were tickled to see your Santa Fe location. We really miss the food (eating at La Choza & Tomasita's in SF are favorite spots) and the abundant sunshine, but glad to avoid the COVID which we hear has been really bad there recently... take care of yourself.
Best wishes for getting "Harpo's" voice/sounds back soon, although your C8 might need a new nick-name as a result
.-Rick
BTW / off-topic: we are NM "ex-pats", so we were tickled to see your Santa Fe location. We really miss the food (eating at La Choza & Tomasita's in SF are favorite spots) and the abundant sunshine, but glad to avoid the COVID which we hear has been really bad there recently... take care of yourself.
Last edited by R & K C8; Dec 27, 2020 at 01:51 PM. Reason: fixed typo
Le Mans Master
Joined: Dec 1999
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From: One Hour From Boston!
I had the same problem; no radio, no directional (blinker) sound, no audio whatsoever. Happened when I had just 90 miles on the odometer. The audio amp fried! Dealer ordered a new one and it arrived in two days. Been fine ever since. Tell your dealer to refer to Document ID 5389145. Here is what was written on my receipt:
“Scanned vehicle for codes, found U0186, B1A23, U3002, U0209, B129D and U1009 in modules throughout vehicle. Contacted TAC, was told to check power and ground going to vehicle’s amplifier (located under passenger’s footwell area). Confirmed good power and ground leading to amplifier. Recommend replacing audio amplifier to correct issue. Remove/replace amplifier per Document ID 5389145. Reinstalled all removed parts and programmed new amplifier .”
“Scanned vehicle for codes, found U0186, B1A23, U3002, U0209, B129D and U1009 in modules throughout vehicle. Contacted TAC, was told to check power and ground going to vehicle’s amplifier (located under passenger’s footwell area). Confirmed good power and ground leading to amplifier. Recommend replacing audio amplifier to correct issue. Remove/replace amplifier per Document ID 5389145. Reinstalled all removed parts and programmed new amplifier .”