88,89,90,91,92,93 Brake Control Switch replacement, controls rear brake lights and Torque Converter Clutch (TCC), 700-R4 transmission
Thought I would add some background... This all started due to 8 mile per gallon from my suburban - and I was trouble shooting everything. Turned out the problem (after replacing MANY electronic components) was the oxygen sensor ($18 - local parts store)... Back up to 16.5 mpg at 70mph... Anyway - along the way I discovered the transmission on the suburban - a 700R4 - has a lock up transmission capability - which I subsequently figured out was not working on my suburban. There are plenty of videos out there to show how to check if YOUR lock up converter is working... When it does work correctly - it should save gas and the extend the life of your tranny... Anyway - I traced the problem with the lock up feature on the transmission to the brake light switch. Works great now. Who would have THUNK!
8 сен 2024