GM Radio Front Speaker Adapter 1978-1984 Email 4-Wire GM Front Radio Speaker Adapter Part #: 2544F Part #: 2544F Quantity Price ea. 1 + $9.66 4 + $8.21 15 + $6.76 Sale Price! 8.21 Back to: GM Interior Connectors Ask a question about this product GM Radio Power Adapter 1978-1984 Radio Rear Speaker Adapter Description 4-Wire GM Front Radio Speaker Adapter. From 1978 thru 1982. Replaces GM #12102605 and AC-Delco #PT292.