I had that problem in my 84 and it turned out to be the cable itself
whats wrong with it?
There is no speedo cable, the dash is electronic. Thirdgen.org has more detail on how to fix it.
You can fix the speedometer in your 1994 Oldsmobile 98 by replacing the speedometer cable. If changing the speedometer cable does not fix your speedometer you will need to replace the entire speedometer.
I replaced the starter but it makes a grinding nose how do i fix it
how to fix speedometer for Toyota mr2
I need to fix the odometer and speedometer in a 97 ford explorer
Send to a speedometer repair shop or replace speedometer head
New CV joints will fix the grinding noise
If the speedometer is not working it probably needs a new speedometer cable. If the speedometer is actually broken either take it to as speedometer repair shop or replace it.
Most likely speedometer cable
May have to take the truck to a certified speedometer repair shop
My 89Chevrolet astro van digital speedometer stop working. How do I fix it