Question about 1999 Chevrolet Silverado 1500
Im trying to locate the kickdown switch under my dash, my truck has the 454 w/turbo 400 trans, i looked under the dash, and all i see is where the throttle cable hooks to the pedal linkage, and where the pedal bolts to the floor. i have been told ther is a slide switch for the kick down but cant find it....HELP!!
That was old school , vehicles with the turbo 400 transmission are equipped with an ECM controlled downshift system , when vehicle is at speeds below 70 mph a forced (detent) downshift is possible by fully depressing the accelerator ,when the ECM detects a drop in manifold vacuum (high map sensor reading) the downshift control relay is energized by the ECM , the relay detects battery voltage to the detent solenoid in the transmission to open open an oriface to force the transmission to downshift ..... if yours is not working i would first check the downshift relay , under hood , picture is so bad i can't tell , looks like on the firewall more to the passenger side , next to fuel pump relay , if it needs more diag than that maybe you should get an estimate for repair from a trans shop or such , hope ya fix it , cheers .
Posted on Jan 09, 2009
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Posted on Jan 02, 2017
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