TSB Information Needed

Well, the first one is about the infamous intake manifold gasket problems causing oil or coolant leaks on vehicles with the 3.1 or 3.4L V6, it advises to use a new gasket design (P/N 89017279) as well as new bolts when replacing.

The second is a generic bulletin covering all GM vehicles, giving the accepted maximum rate of oil consumption for in-warranty vehicles of 1 quart in 2000 miles. It provides some possible causes of high oil consumption, and instructions on accurately measuring oil consumption to see if it exceeds the guidelines.