Diesel Engine Problems of Chevrolet Trailblazer

I have a rare Trailblazer with a 5. 3l v8. It is very low miles with 41000, oil changes every 3-4000 miles at gm dealerships. I am an ex diesel mechanic of 10 years. I could not believe it a year ago when the dealership stated: that 1 quart of oil used in 2000 miles was normal consumption. I have checked other sites and many others have the same issue with the 5. 3l in the 1/2 tons and larger suvs that the motor is standard in. I have worked on almost every gas, natural gas and diesel engine from the 80s-late 90s and any motor that uses 1/6th of its oil in 1000 miles as it mine did when visiting family last thanksgiving is not normal 1 quart in 770 miles. I thought: well must have gotten a bad motor (luck of the draw), it is out of warranty due to age not mileage, and I can buy a re-man short block when it goes out and change it my self. I decided to check the web if there is any traffic on the problem. I was surprised to find hundreds of posts of the same problem, and gms lack of ability or desire to fix the problem. It does not take a rocket scientist to figure out that gm has a problem with the piston rings and valve guides leaking into the cylinder when in 4 cyl. Mode, caused by the suction caused by the power stroke (of the 4 stoke cycle) with both valves closed. Oil burns off causing buildup further damaging the engine sensors and cat. Converter. Gm must have solved the problem, because new 5. 3ls have not shown the same issue. To not say it is not a safety issue is insane. Many recalls have been made because of autos suddenly coming to an unexpected stop. What else would happen if your engine runs out of oil after only 1000 miles or less and seizes? what if it happens on a hill while towing, driving across a desert, or in the winter. Lastly if you add up all 2007 5. 3ls on the road burning 2 quarts or more in 3000 miles, how is that not an environmental issue.

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