Turbine Doc
Just Another Diesel Guy
Do the Bosch Duratherms tips swell up?
9G were the swell prone glows, most of those should be off store shelves, 11G don't swell but don't also like extended glow time those also should be hard to find now unless somebody's new old stock/stored ones, or "used but tested good" AC-60G are the std GM replacement, Autolite has a 1110 series which is like the 11G, Delphi has a replacement I forgot the #, Bosh Duratherms reported to be the best all round for longevity & extended glow.