The 2005 Chevrolet Trailblazer LS is a relatively difficult vehicle to maintain, and is only recommended to those capable of vehicle maintenance. You will have to lower the tire from under the vehicle for access to it. The lowering mechanism can grow rusted to the vehicle over time. Changing the headlight with reliability is a problem, as you will have to remove the entire housing first. You will have to use many tools in order to access the engine air filter. The tools necessary may not be readily available for a repair.
Some things are easier on the 2005 Chevrolet Trailblazer LS. The engine coolant reservoir is easily visible in the engine bay. This will allow you to check and replenish the fluid level regularly. Checking the oil level is easy to do, as the oil dipstick is easily accessible in the engine bay. The power steering reservoir has open access in the engine bay.
Hans Angermeier has produced over 100,000 videos showing drivers how to fix things on their cars. He has broad expertise on basic repair procedures covering the majority of cars on the road.