03 Silverado Rear "popping"

XPBri · November 12, 2007

I've tried everything to find the cause of this problem, no luck.

03 1500 Silverado 5.3 ECSB Z-71 Automatic

Here's the problem: The Truck makes a "Popping/ sweaking" noise when accelerating hard from a stop.

1. I was told by GM the TSB does not include my truck.

2. The noise is really loud, but only hard acceleration, it stops at about 25 MPH.

3. The U-joints are solid, so is the trans.

Any ideas on what this could be?

Thanks,

Brian

Draenor · November 12, 2007

I just had the same problem. The rear u-joint was bad. It did seem solid, but after removal the premature wear was noticable.

XPBri · November 12, 2007

I just had the same problem. The rear u-joint was bad. It did seem solid, but after removal the premature wear was noticable.

I'll change the joints today. Was the noise you heard pretty loud? I'm just curious because I've never heard this noise from a U-Joint failure. Thanks for the help!

Bri

Draenor · November 12, 2007

Yes it was loud. I have never had this happen either and still do not under stand why it stop squelling over 15-25mph. At first I thought it was a rock lodged in one of the rear brake rotors. So I took off the rear tires and noticed no abnormal wear in the rotors. What I did next was walk next to the truck while my wife idled along. Thats when I isolated it down along the driveshaft. I then climbed underneath while my wife idled along.(This take alot of faith and trustworthyness). The squelling was so loud and reverberated in the drive shaft it was difficult to pinpoint the problem. I did rule out the tranny and differential. It was a toss up between the rear u-joint and carrier bearing. I did some searching on here and others had this problem too. I replaced the rear u-joint and problem stopped.