Electronic Transmission Controllers

Holley GM 82-93 S10/S15/Sonoma LS Swap Essentials Kit Holley has taken the guesswork out of picking the right parts needed to swap your GM muscle car or truck with our Swap Essentials Packages. Depending on your budget, there's multiple levels...

Holley GM 67-69 F-Body, 68-74 X-Body LT Swap Essentials Kit Holley has taken the guesswork out of picking the right parts needed to swap your GM muscle car or truck with our Swap Essentials Packages. Depending on your budget, there's multiple...

Holley GM 75-86 C10 LS Swap Essentials Kit Holley has taken the guesswork out of picking the right parts needed to swap your GM muscle car or truck with our Swap Essentials Packages. Depending on your budget, there's multiple levels to choose...

Holley GM 73-87 C10, 79-87 C20/Blazer LT Swap Essentials Kit Holley has taken the guesswork out of picking the right parts needed to swap your GM muscle car or truck with our Swap Essentials Packages. Depending on your budget, there's multiple...

Holley GM 67-72 C10 LT Swap Essentials Kit Holley has taken the guesswork out of picking the right parts needed to swap your GM muscle car or truck with our Swap Essentials Packages. Depending on your budget, there's multiple levels to choose from;...

Holley GM 63-67 C10 LT Swap Essentials Kit Holley has taken the guesswork out of picking the right parts needed to swap your GM muscle car or truck with our Swap Essentials Packages. Depending on your budget, there's multiple levels to choose from;...

Holley GM 67-69 F-Body / 68-74 X-Body LS Swap Essentials Kit Swap Essentials Mounting Package - 1967-1969 GM F-Body/1968-1974 X-Body Holley has taken the guesswork out of picking the right parts needed to swap your GM muscle car or truck with our...

Holley GM 64-67 A-Body LS Swap Essentials Kit - Forward Mount Swap Essentials Mounting Package -1964-1967 GM A-Body LS Swap Kit- T56, T56 Magnum, 4L60E, 4L65E, 4L70E, 4L80E, 4L85E or TH400/200R4 Transmissions - Forward Engine Position Holley has...

Holley GM 67-72 C10 LS Swap Essentials Kit Swap Essentials Mounting Package - 1968-1972 GM A-Body - T56, T56 Magnum, 4L60E, 4L65E, 4L70E, 4L80E, 4L85E or TH400/200R4 Holley has taken the guesswork out of picking the right parts needed to swap your GM...

Holley GM 67-72 C10 LS Swap Essentials Kit Level 2 Holley has taken the guesswork out of picking the right parts needed to swap your GM muscle car or truck with our Swap Essentials Packages. Depending on your budget, there's multiple levels to choose...

Holley GM 63-67 C10 LS Swap Essentials Level 2 Holley has taken the guesswork out of picking the right parts needed to swap your GM muscle car or truck with our Swap Essentials Packages. Depending on your budget, there's multiple levels to choose from;...

Holley EFI Transmission Control Harness 1996-08 GM 4L60E/4L80E - 558-405 Fits Pre-2009 4L60E & 4L80E Transmissions This harness provides plug and play for Pre-2009 GM 4L60 and 4L80 transmissions using a Dominator. This also contains a J4 connector...