gauges

[1fine89]

i have an 89 1/2 ton gmc, with out a factory tach, i added an aftermarket one. So my question is what problems would i have installing a 90-94 gauge cluster with a factory tach?

[Buffalo]

There is a good write up on this in the Tech Articles section. It takes a bit of soldering, as you will need to cut off your gauge connnector and solder in a '92-'94 one as well a a DRAC. But it is well worth it as you will not only get a better looking dash with tach, but you will also get the added benefit of being able to recalibrate the speedo for gear/tire changes.