2019_Silverado_HC

I have a 2019 Silverado and I use Apple Car Play quite a lot on long drives. I have noticed that after about playing for 2-3 hours it will produce static that is corrected by unplugging the phone and re-plugging it in. I have never figured it out. I use the original apple cord and it has happened on both the USB and the USB-C ports, same phone and different phone.

Part number referenced for the isolator he used is 84474225 which is different from the SB part number.

I brought my truck to a different dealer after getting frustrated with how bad the noise is getting now that it is full on summer in Houston. The tech that did the work noted that the other dealer did in fact perform the service bulletin but that he had a different isolator that he uses when he does the fix. He's been doing truck suspensions for 25 years. After the fix, the rear end is more quiet then when I bought it. I don't know what he used, but it works. Supper quiet and tight. I guess I have learned that the SB fix may not be adequate or the first dealer didn't do the work correctly. I will keep y'all posted if I have new issues.

I have further narrowed my suspension noise to be coming from the passenger side leaf spring where the band wraps around the leaf spring in the back. There is enough play in the “band” that when the truck is shaken side to side to emulate what happens to the suspension when I leave the driveway. The problem is I have not a clue how to even try and isolate the band form the spring. I feel a piece of rubber would be a potential solution, but there is no way to remove the band and do this. I might just buy the composite leaf springs which don’t have this band and see if this will fix it. Anybody got a part number on the Denali rear leaf springs?

Mine does it too. I have had all the recalls done. It did it before the recalls and after. I have a 2019 Silverado with 30K on it.

I had all of the recalls done last week and no issues. The final revised fix works. No issues with lane departure or front camera either. Worked as soon as I picked it up.

I have a 2019 High Country and went through the exact same issue. Dealer was instructed by GM to remove the rear spoiler and apply sealant. Didn't work. Next fix was to remove the rear window and reseal. Didn't work. Finally had to replace the entire rear window and that solved it. Dealer kept the truck for close to 7 days but they made sure they didn't return it until it didn't leak. Make sure they test it with water before the return it. My dealer was well versed in the process and made sure it was done correctly.

Changed my exhaust to a Borla and still have the chirp. It is not the exhaust.

I have it bad on my 2019 HC. Do you have a reference number to the TSB?

Mine does it to. I have an early September 18 build. It's done it since I took delivery. Service department has not been able to find nor fix it. It goes away about 20-30 seconds into warm up.

My 19 HC also has resonators like this.

Just noticed that every time I back into a steep driveway that requires the rear suspension to articulate to one side there is a pronounced suspension clunk and bushing noise. This is a pretty extreme articulation even for a driveway, but was curious if anyone else has a similar noise. Suspension is Z71 on 20inch tires. No noise if both tires hit curb at same time. Similar noise is produced when exiting and turning making each tire descend the curb individually. Thanks!

Perhaps we are getting closer to being able to tune the 6.2. Not sure about the 10 speed transmission though. http://hennesseyperformance.com/715-rwhp-2019-zr1-corvette-tuned-by-hennessey/ Mike

RAP only stays on until the driver door is opened.

Does anyone know how Hennessey is supercharging 2019 silverados without the ability to program the ECM and tranny?