6 0 1995 Allison AT545 Transmission for a GMC Topkick $725 USD (USED) Allison AT545 Assembly#: 15986036 Input Lgth: Automatic Input Dia: AUTOMATIC Pilot Dia: AUTOMATIC ConditionUsedAssembly Number15986036Fits To Make(s)GMCFits To Model(s)TOPKICKStock Number25825402 MLS Number13695176CategoryTransmissions Last Updated10/30/2025 LocationKansas City, MO, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info