3 0 Allison MT654CR Transmission for a 1987 GMC BRIGADIER $900 USD VERIFICATION PENDING, Serial#: 2420109951, Engine Make: DETROIT, Part Make: ALLISON, Engine Model: 6L-71N ConditionUsedEngine ModelDetroit 6L-71NFits To Make(s)GMCFits To Model(s)BRIGADIERWill Fit Year(s)1987Stock Number3A1E51514 MLS Number11631986CategoryTransmissions Last Updated11/11/2025 LocationSte-Julie, QC, Canada Sold ByCamions Lussier-Lussicam inc. (844) 503-___ SHOWNUMBERCall Seller Email Seller Save More Info