[surfamtn]

Thanks guys,
I was working on the truck the other day, about the time you were posting this... I stumbled on the conclusion the the turn signal switch in the column is the last possible point of failure. Which of course would have been easier to find had I read Jollys article first.

Now I just have to source the correct (turn signal) indicator switch. Sounds like the one for '63 Chevy is the most readily available that will fit? (sorry if that's blasphemy but a driving GMC with a Chevy part is better than a non driving GMC right)