General Motors GM-52074 Glow Plug Bore Carbon Remover Shop by Category > Hand Tools>Specialty Sockets Chadwick & Trefethen 08320 #32

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General Motors GM-52074 Glow Plug Bore Carbon Remover Shop by Category > Hand Tools>Specialty Sockets Chadwick & Trefethen 08320 #32General Motors GM 52074 Glow Plug Bore Carbon Remover Kent Moore Tool Number: EN 52074 Applications: 2016 and later Silverado and Sierra with 6. 6L Diesel engines. GM 52074 removes carbon buildup in the glow plug bore, which can interfere with or damage the glow plug tip during replacement. Once the grease is applied to the reamer to catch any carbon removed, GM 52074 pilots into the glow plug bore, and the reamer end passes into the head's combustion