OER Parts offers a wide selection of Battery Accessories for your 1990 GMC Safari. OER Parts offers 1990 GMC Safari Battery Tender, 1990 GMC Safari Battery Managment System, 1990 GMC Safari Dual Battery System Controller Set, and 1990 GMC Safari Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller