What type of oil for a 2005 chevy trailblazer?

The 2005 Chevy TrailBlazer uses SAE 5w-30 fully synthetic motor oil. The 4.2 liter engine has an oil capacity of 7 quarts. You can purchase this common oil in one-quart bottles at most retail stores, automotive parts and accessories locations, and from online reputable websites. You should expect to pay between $2.95 and $15.35 per bottle, and You will need at least 6 bottles for a full oil change. First, loosen the drain nozzle found at the bottom of the reservoir. Next, remove the screw-on cap at the top. You can use a $1 to $5 funnel to gently pour the quarts of fluid into the reservoir until it reaches the fill line.