Metal clunking sound when turning on truck

[mynameisante]

The last three or four days, I've been hearing and feeling a metal "clunk" in the rear when I would turn on my truck. Is it the auto parking brake? I have that option set to "on." Regardless if that's on or off, I always use my parking brake so I'd assume it's the same deal whether or not I have the auto turned on?

2021 Rebel 4x4

 

[Fatherof3]

When I start my truck I hit the brake , push the start button and immediately let go of the brake and it doesn’t clunk .

 

[mynameisante]

Hm, I'll try that. If I remember correctly, I do keep my foot on the brake for a bit after turning it on

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[CaliRebel]

When I start my truck I hit the brake , push the start button and immediately let go of the brake and it doesn’t clunk .

Ditto.
Someone on the forums put a camera under their truck to see if maybe they could see what was going on when they started it.
It turns out it was the driveshaft moving when the truck starts.
I was having the same issue, then I started letting go of the brake when I started the truck. Problem solved

 

[yankeefan31569]

mine did that for two or three months then the stater went..