Clunking noise

[helomech09]

I'm having an issue with my 09 silverado when I let off the gas and coast I'm o.k. But when I reapply the gas there's a loud clunking noise any ideas

[ct9a]

It could be slack in the drive shaft being taken up when you reapply the gas. I've never heard of it in a truck, but I know I've had that problem with certain sports cars before.

[tattooed4life]

awfully new for u joints to go bad. maybe wanna check them just in case.

[helomech09]

Yeah im hoping it's not major it just seems like it's not keeping positive connection between the tranny and the rear end

[zachh1020]

Sounds like EXACTLY what happened to my 2003 Silverado. It was U-Joints on mine. Your's is awful new to have that problem. Factory Defect Maybe. Check with the dealership and your warranty.

[Z71_guy]

warranty? sounds like slap in the drive line probably the spline shaft on the rear drive shaft

[CarpenterGuy]

thats the joint on your driveshaft closing up the gap. it makes a clunk. both of my trucks do and have done that. it's normal as far as i know

[spottweld]

sounds like u joints to me the problem will get steadily worse and the noise can either come from behind the tranny or back by the rear

[2ToNe04]

take it back to the dealers i assume you still have warranty since its an 09?

[lgrppup]

Hey...I have an 08 Sierra that has the same issue. Also, When taking off, especially if I am turning and taking off(ie intersections) it seems as if the truck is slipping somehow. The engine goes, but the tires seem to take a lil bit to "kick in". Def need to take it to the dealer, but I will probably get the "we couldn't reproduce the problem" response. The dealer I have been working with, unfortunately decided not to sign on with the new GM and shut their doors...too bad.