2006 GMC Envoy • V8 4WD Automatic • 50,000 miles

I have a 2006 GMC Envoy Denali. It started using oil and the technician at my GM dealer said that there had been a problem with the lifters in that model, SO, they changed the lifters. I'm at time for my first oil change since changing the lifters and my car is 1/2 quart low on oil. Anything else I might look for? The car doesn't even have 50,000 miles on it.
December 27, 2010.

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