Holley EFI 558-405 GM 4L60/80E Transmission Harness (Pre '09)

Holley EFI 558-405 GM 4L60/80E Transmission Harness (Pre '09)

Holley EFI

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GM 4L60/80E Transmission Harness - For 1996-2008 Transmissions only.

GM 4L60/80E Transmission Harness - Complete terminated harness with j4 connector to operate GM electronic transmissions. For 2009+ GM 4L60/80E Transmission use Holley EFI Part Number 558-455.

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