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Got an interesting one for the forum. After the truck (2016 GMC Sierra) has been sitting a while (usually over night or for a few hours) the pedal let's out a nice squeak. On rare occasions I can get it to do it twice in a row, but most of the time the squeak is only for the first press then is gone for all the other presses. Normal daily driving I don't hear it, it's only the first press or when I have to hit my brakes hard (ex, cut off by someone). My local dealer service department (who's treated me well and has good mechanics) looked at it and said they can't repeat it enough to truly diagnose it. Some squeaks are real quick and others last about 2 seconds. The only way I can describe it is like a relief valve letting some air out, but with a squeak. Sometimes I can hold the pedal in place after depressing and the squeak continues to let out. It's not like a metal plunger rubbing on a rubber boot as I depress the pedal, plus I would be able to make the sound every time if that were the case. Below is a video I took on two different occasions, they are looped a couple times. You'll hear what I'm talking about and see that it's gone on the second press. I did have the vacuum pump replaced due to the recall about a year ago, I noticed it after that but the dealership said the pump and vacuum is holding well the entire time, even when it squeaks. They only guess they had was to replace the brake pedal assembly or the brake booster, but admittedly said that would just be throwing parts at it. Just got the truck back today, didn't get charged for the diagnosis since they couldn't figure it out. Now I'm turning to the forum. Any idea what's going on?!?
Hey crew! As many of you know, I've been hard at work on these HMI's for about 9 months now ever since I purchased my GMC Sierra last summer. I have since started programming modules for many of you right here on these forums and I could not be more grateful for all of your support and kind words. A feature that has been requested from me many times over has been custom boot animations/logos/sounds and I am very happy to announce that after a lot of research and many nights of testing and programming I have finally achieved this task! Please see the video below for a small demonstration. If any of you are interested in getting this done to your vehicle equipped with a 2.5 HMI please send me a PM and we can discuss this upgrade! Also, Please post ANY programming requests you'd like done on your truck and I'll do my best to make it a reality. P.S. - This is just the beginning, there's lots more to come. Stay tuned... -Mag