Lights on like a Christmas tree read thru the threads changed brake light switch n notices brake light out back a little died on the side of the hwy automatic shut down
lights all blinking headlight and inside had juice but wouldnt start so towed. Next day started right back up n i learned how to by pass to put in neutral. Came down thru searching bought a new alternator but truck now seems like if in normal drive its running high like 2nd or 3rd gear but if put into sport n drive manualy normal what is my issue truck has 255k on it any thoughts would help thank you