2017 GMC Sierra 1500 When truck shifts from 1st to 2nd you hear a clunk noise from the driveline. The service department gave us a paper with...

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Hello Janet

How are you doing? 

Is this not covered with warranty because it's just almost a year

That's good. It's not only you experiencing this issue Janet. Usually they thighten the bolts but will not resolve the issue. Some found it that it's trying to adjust on your driving style but still not the point. The driveline should really have a physical check up and replace the affected parts. It's a common issue but it's always repairable Janet

There's a possibility that the brakes lock up too early during stops and too late to disengaged when taking off. This can create a clunking noise to the transmission and driveline as well. You can tell this to the dealers on the next visit. They will check the brakes as well for this matter Janet

Yes Janet you should go back and tell them to fix it. It's their responsibility and you should get your moneys worth. Tell them about the brakes can be the issue as well because it can be dragging the driveline during stops and taking off. They will understand that principle and they will know that you have help from the outside for them to fix this issue.

I see... Yes Janet it is resolveable. There are issues of loose bolts and brake issues. Once the brakes our bleeded properly, the clunking noise are eliminated because the dragging from the brakes stopped.

Dear Janet, It was a pleasure helping you with your GMC issue today. Here is a summary of the resolution.

Issue identified : clunking noise in the driveline
Solution Implemented : Possible loose bolts or sticking brakes that's dragging the driveline during stops and taking off. It will be sent to dealers to check and resolve the issue. Solution Accepted
If issue resurfaces : Advised to contact us at s**t@experthelp.com or call us on our support number ***-***-**** )