Specialty Products Company (SPC) 86370 GM Express and Savanna Alignment Cam Plate Designed to be easily adjusted with a 3/8 inch drive breaker bar, this cam makes the difficult to align GMC Savanna and Chevy Express Vans a snap. Forward bushing with this cam and you will be able to dial in camber and caster. Replacement guide pins are also available, see part 86325.