Corvette Performance - 99 c5 no hvac or speedometer

just got a 99 auto c5 corvette 162,xxx mi


first, the hvac lcd display is not showig anything, (dark/black) seems like the fan up and down workd but will not switch out or window defrost. freon psi is good.

second the speedometer showed zero . sometimes when coming to stop or starting it will work up to about 3mpg then goes to zero...... shifts fine, the computer is seing the correct speed. when i plug in code reader it shows no codes and showed the correct speed


im thinking there not related but im not sure


i really appreciate any help... i dont want to wast money throwing parts at it.

i fixed the hvac problems. soldered the hvac headunit, found broken vac lind on hvac canister.. the cluster still has no speed and none of the function buttons on the right work

this is just gonna be a stab in the dark, but ive heard people whispering about poor & faulty grounds to the frame. Ive heard one guy go into detail about he has chased ghosts in the electrical and basically wired his whole car again


Posted from LS1Tech.com App for Android