I used the 10 dollar spark plug removal tool they sell at Autozone for all 6 of mine on my 97 Blazer 4.3L - including #3. The tool is just a 12" extension with a 5/8" spark plug socket on the end that can swivel about 15 degrees. Went through the wheelwell on all six I think too. The #3 plug was tough though. I remember thinking to myself "I am glad I don't have an 8 cylinder engine".