Today, the roads are full of crossover SUVs that often feel like luxury cars with a little extra ground clearance. But back in the early 1980s, SUVs were much more rugged and utilitarian. This 1981 Chevy Suburban, affectionately nicknamed "Big Green," is a prime example. It belongs to our friends at Hemmings, who have been gradually restoring it and documenting the journey through their video series "Road to Improvement." On one recent episode, we had the opportunity to help Mike and Elana clean up its aging interior, replacing some worn-out components and refurbishing others.