What would cause a rattling sound in the left wheel and steering wheel when you make turns on a 2004 Tahoe?

Answer 1

There is a known problem with the steering assembly on most Tahoe's that Chevy denies to this day. They claim that it is within factory tolorances and is acceptable and not covered under warranty. Note: Before you start this project, take out the floor mat and lay down some plastic bags to protect the carpet. If you look under the hood and located the steering coming out of the firewall, you will see a rubber boot. That boot covers a U joint, which in most cases is the problem. Now, under the dash follow the steering column down to the firewall and gently remove the casing foam and sealer from the junction where the steering goes through the firewall. Chevy suggests that the joint be lubricated with white Lithium grease, which in most cases is expensive. I used a grease gun with a high grade, high temp grease and then capped off the top with a high grade bearing grease. The bearing, or axle grease acts as a dam and seak the joint from the inside. It's hard to see how much you need, but I would guess that I used at least 1/2 to 3/4 of a tube from the grease gun, and additionaly a half a can of bearing (axle) grease. Now you can put the foam gasket back on and return the boot back to the normal position. If the rattling is still there just repeat the process and put a little more grease in the joint as described above. This worked for me, and I hope it helps you out.