OTC 6045 Camshaft Timing Tool Set for 3.4 DOHC Engine Indispensable for servicing timing belts on GM 3.4L V6 DOHC engine Works on 1991-1996 Chevrolet Lumina and 1995-1997 Monte Carlo 1991-1998 Olds Cutlass Supreme and Pontiac Grand Prix Tool (A) holds the camshaft in the correct position Tool (B) is used to pull the cam gear from the camshaft Tool (C) is used to turn the cam gear to time the camshaft