Hello,
I have a 2005 Chevy Silverado 1500 4WD. It's got approx 39000 miles on it. Two days ago it started experiencing some trouble. There has been an intermittent thumping noise, usually when making left turns and occasionally when making right turns. The thumping noise is accompanied by a slight vibration in the steering wheel. This occurs in 2WD and auto-4WD modes.
If I had to take a guess, I'd say the noise is coming from the front end, possibly on the drivers-side, but it's hard to localize.
I've tried jacking the vehicle up and spinning the front tires by hand, and notice nothing wrong. Verified the front diff has plenty of fluid.
When shifted into 4WD (4HI or 4LO), there is a good deal of gear noise coming from the driveline. Turning a sharp left will seize the driveline. It's possible it would move if I gave it some gas, but I didn't want to mess anything up, so I only gave it a little bit of power.
Any ideas what is wrong? I'm going to the dealership probably on Monday.
Thanks
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