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I replaced 4.3 in '00 blazer. runs great but speedometer doesnt register nor will it shift gears. I've checked plug-ins on harness. Then replaced vss. Still not working. Is it possible that I have a bad ground?
I had test done on it,hav new motor/ transmission////check evrything even rpm and speedometer,plus check guages light comes on,please let me know wat you think