OTC's Injection Pump Wrench Set is used to loosen or tighten injection pump retaining bolts whenever pump timing adjustment or pump service is required on 1996-2000 GM full-size 2 and 4 wheel drive trucks, vans, and Suburbans with 6.5L diesel engines. Two specially formed wrenches are needed due to the location of the throttle, cruise control, T.V. cable bracket, cooling system crossover pipe and bracket, and the thermostat housing. Both wrenches are 15 mm, 12-point, double box-end type. Tools similar to Kent-Moore J-41711 and J-41089. Value is at the core of the OTC tool and equipment portfolio. For a simple repair or the most complex drivability concern, these award-winning tools universally solve problems faster, and at better value, than any other product line available. Whether it's a specialty tool or unique piece of service equipment, OTC provides top solutions to modern automotive service challenges while increasing technicians' productivity and shop profits.