Jaytee, c&ws if the Blazer’s 3rd row seats are anything like the Acadia’s kids shouldn’t have a problem climbing back there. You wouldn’t want to take long drive with passengers back there but short drives they should be fine.
2018 FWD Terrain Denali, Steel Blue Metallic, 2.0L Turbo, Sunroof.
2017 FWD Acadia Denali, Crimson Red Tri-Coat, V6
2014 FWD Buick Enclave Leather
2012 FWD Equinox 2LT V-6,