The 2007 Chevrolet Trailblazer SS is moderately difficult to maintain on account of some complicated procedures. The headlights will require both the grille and the entire bulb housing to be removed, both of which are held on by several clips. The tail lights' bulb assembly is tightly secured into the housing and will require multiple tools to remove them. Removing the battery will also require many tools, as multiple different fasteners secure the panels and sway bar that cover it in the engine bay.
However, the 2007 Chevrolet Trailblazer SS does have its upsides. The fog lights can be reliably accessed by simply reaching behind the front bumper. It also comes with a transmission fluid dipstick, so checking its levels is no problem to do when necessary. The engine air filter is easy to remove and clean for maintenance, requiring only a single bolt to be removed in order to access it.
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.