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My speedo on my 91 blazer 4X4 has been out for 3 years lol. I checked the wires..all good. I checked and replaced (twice) the VSS. Still no speedo. I am now thinkin bout buying a speed buffer. The VSS sends its signal to the speed buffer which tells the cpu at what speed your traveling and with what size tires. Good luck however finding one of these aftermarket lol!! I have found NOONE who sells speed buffers. I have found speed callibrators but those still plug into the buffer and if its bad (the buffer) then the callibrator is worthless. If any1 knows where I can get 1 LOL PLEASE tell me lol. I REALLY dont want to call chevy. $$$$$$$.
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