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I'd ask the owner whether or not he/she has installed the updated valve cover assembly that controls oil flow for the Active Fuel Management (AFM) system, and whether or not their truck is using oil. I've got an '07 LT that started using oil around that same mileage, and it was related to...

A couple weeks ago I submitted a post regarding my '07 Tahoe that was exhibiting a loud metallic "snap" or "clunk" noise upon deceleration. After 7 weeks of battling this issue and three dealership visits without resolution, I have islolated the origin of the noise. Through some...

BillMoulton - Thanks for replying. I believe that there is an existing service bulletin that was issued for the problem that you describe (anyone happen to have the number?). Seems like I came across that bulletin a couple weeks ago in some online searching, but I'm still not sure the...

I'm still trying to isolate it also. It's getting more predictable and repeatable. It's at a point now where once the driveline is suffficently warmed up (like from a long highway drive), I can pretty much force the noise to occur. The other night when coming into town after a 1-hour...

I've got an '07 Tahoe with 222K that I purchased new. It has been a great truck with essentially zero issues - until now. For the past several weeks, I have experienced what seems like some type of driveline issue. Here is how it presents itself: After coming to a stop at an...