GM 4.2L Camshaft Holding Tool
2002 GMT360 (Chevy Trail Blazer, GMC Envoy, Olds Bravada). Holding the camshafts at T.D.C. to ensure proper timing when servicing cams, gears, chains, etc. is important. 536172 is a metal plate positioned over the ends of the camshaft to prevent rotation.
