How do you replace a rattling speedometer cable on a 1986 Caprice Classic?

To replace the rattling speedometer cable on a 1986 Caprice Classic, first, disconnect the negative battery terminal for safety. Then, locate the speedometer cable at the back of the speedometer gauge and the transmission; unscrew the cable from both ends. Remove the old cable and install the new one by securing it to the transmission and reconnecting it to the speedometer. Finally, check for proper function and reattach the battery terminal.