Hey guys, just a quick question as I cant seem to find this info anywheres. My speedometer is intermittent on my truck, I've changed the VSS, and its still doing it, so Im thinking its the DRAC, but I cannot find it. I remember reading somewheres that the 88-89 trucks have it built into the instrument cluster, just wondering if this is true and if so is it removable/servicable and can I switch to an external unit?