Thanks for staying engaged with my problem Dragon. No, doors opening and closing, tapping speakers doesn't seem to have anything to do with it. Here is something odd though, a common chain of events seem to be part of it, but maybe not I will pay more attention to it from now on and count starts. It seems that if the radio and charms don't work on the mornings first start, after a few starts and stops, just normal driving to store and home then post office and home, stuff like that, after a few of those it starts working, might have nothing to do with it but I will pay attention to that now.
Radio, display works but no sound
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While searching for information on how to unlock GM factory radios I came across a similar issue like you are having . The information stated that that radio amp is bad . After chasing this problem for as long as you have with no resolution I suggest this . Go to carstereohelp.com and ask for their opinion . It's worth the effort to get a professional opinion on this .
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Yeah that is what we are thinking too, but just trying to exhaust the free stuff first. The unlocking info will be handy if Coco needs to replace the head unit. Some of the more expensive Ebay units come unlocked, allegedly. If getting a used unit from another vehicle, it will likely need to be programmed at the dealer to make it work. Not sure how much that would cost, but it is hard to get a dealer to do anything above an oil change for less than $90.
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Two more things you might want to try . Pull the radio and hook it to a 12 volt power supply and at least one speaker . If you get sound at least you know the radio works , however it may only display the locked message , hard to say if this will work with a locked radio . Find an unlocked radio that is known to work and try it in place of your radio , or buy a Wallmart radio for $16.00 bucks and try it . You can always return it for your money after you try it . The point here is to determine if the radio is at issue or if it's something other than that .
Made an appointment to have the radio checked out and maybe replaced at the local Maui Certified Sounds, everybody that I have talked to that has done business like them and I liked them after talking to them too. They will take the radio out and hook up another to see if it works and see if mine works outside the truck hooked to power. They said they can get a simple radio like mine is, no CD or OnStar or Bluetooth for around $80 and a PAC interface to keep the charm system for around $120. So weird though, today on first drive no radio or charm, drove it later and it all worked perfect. frustrating.
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So its cold blooded sometimes. 
Doesn't like waking up in the morning.
May as well get a radio with BT, if you have to get a new one. That way you can stream tunes to it, or your podcasts of choice. Whatever.
They will definitely try to sell you new speakers too. it may not be in the budget this time, but get some recommendations and listen to some in the shop. May be a fun DIY next year to get the most out of your new radio.
Let us know.
Doesn't like waking up in the morning.May as well get a radio with BT, if you have to get a new one. That way you can stream tunes to it, or your podcasts of choice. Whatever.
They will definitely try to sell you new speakers too. it may not be in the budget this time, but get some recommendations and listen to some in the shop. May be a fun DIY next year to get the most out of your new radio.
Let us know.
Been a while and I haven't done anything about it but like you say Dragon it is cold blooded. So I suppose that it is the radio plain and simple. Comes on after being driven a while.So its cold blooded sometimes.
May as well get a radio with BT, if you have to get a new one. That way you can stream tunes to it, or your podcasts of choice. Whatever.
They will definitely try to sell you new speakers too. it may not be in the budget this time, but get some recommendations and listen to some in the shop. May be a fun DIY next year to get the most out of your new radio.
Let us know.
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To add to this conversation and confusion: I have a 2017 Colorado. Since the first year I bought it, the radio and ALL audio (including chimes and turn signals) have occasionally gone out. If I restart the vehicle, I can often get the audio back, otherwise it turns on again on its own at another time. I’d say audio works 90% of the time.
I also have intermittent Engine Light and Service Security lights, which come and go, seemingly without cause, and have ALWAYS occurred since I bought the car. Unpredictable, and they don’t interfere with driving.
I also have intermittent Engine Light and Service Security lights, which come and go, seemingly without cause, and have ALWAYS occurred since I bought the car. Unpredictable, and they don’t interfere with driving.
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Yours sounds like a voltage/ground issue Mike. Have you been able to pull any codes on it to help?
Im assuming it never cooperates when you take it in to the dealer to have them fix it when it was under warranty
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Hi Dragon08, and thanks for the quick reply!
You're exactly right about it not cooperating anytime I brought it into the dealer when it was under warranty.
I'm ignorant about pulling codes: how do I do that please?
Mike
p.s.: Oops! I was thinking of my wife's car earlier - the Chevy Colorado is 2015 (not 2017).
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Bought a new battery today; so far, so good, and no audio issues nor Check Engine light nor Service Security System light... I'll post here if any of these mystery issues return!
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Did you ever figure out what the problem was? Cause my truck is doing the same thing
If you are asking me the answer is no, I am living with it, it always comes on after either driving a while or a few starts and I'm not big into the radio anyway, 100,000 plus miles and everything else is good so I'll let it slide for now anyway.
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Ok thanks for letting me know
U know dat bruddah
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I know this post is going back 6 months, but I just want to add that I just purchased a '21 Colorado and I am having the same issue. Luckily I am under warranty, so I'm bringing to the dealership to get it figured out. If anyone is interested, I will update on the findings.
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mine too. Need help
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