Greeting from Washington State I just joined this BBS and had to post my first question. I have a 1988 6.2 K3500 that has a speedo problem, the speedo needle basically bounces all over the place or doesnt do anything at all....any idea what could be causing this? Do I need a new speedo gauge or? Is there any easy trick to fix this or could I install an aftermarket speedo to solve the problem? Thanks for any advice!