can some tell me what is involved in putting a ignition coil in a 1994 gmc van thanks?

Locating it, a few screws or bolts, and 2 connections. Thats about it.

Its mounted on the intake manifold between the throttle body and the distributor. To get to it all you should have to do is take off the 'doghouse' which is the cover inside the van between the seats that usually has the cupholders on it. Usually there are 4 bolts or clips that hold it on. 2 are sort of up under the dash the other two are on the floor. Once thats out of the way it should be right there in the open.

The gray connector with pink and white wire come off before the black connector.