OER Parts offers a wide selection of Battery Accessories for your 2003 Cadillac Escalade. OER Parts offers 2003 Cadillac Escalade Battery Tender, 2003 Cadillac Escalade Battery Managment System, 2003 Cadillac Escalade Dual Battery System Controller Set, and 2003 Cadillac Escalade Battery Relocation Set. Battery Mat Battery Topper Battery Terminal Protectors Battery Post Cleaning Brush Battery Terminal Puller