Mastering GTO Restorations: Electrical Guide Mastering GTO Restorations: Electrical Guide April 17, 2015 by Pontiac DiY The wiring systems of the 1964– 1974 Pontiac GTOs are probably closer in complexity to a Repairing a 1965-1967 GTO Tach - Hot Rod Network Repairing the tach on this 1965 Pontiac GTO was easy, This ’65 GTO breathed a big sigh of relief as its new pacemaker kicked to life and started monitoring one of any performance engine’s most vital signs. We were familiar with the wiring, but if you’re not, label each wire or light bulb as you remove it. GTO/Lemans Dash Tachometer Installation - YouTube Click to view on Bing1:00Easy instructions about installing a dash tachometer in a 1964-72 GTO or Lemans.Author: Max PerformanceViews: 15K Wallace Racing - Wiring Diagrams Wiring Diagrams Wallace Racing . Index . 1957 Pontiac wiring . 1958 Pontiac wiring. 1959 Pontiac wiring. 1960 Pontiac wiring. 1961 Tempest wiring. 1961 Catalina, Star Chief 70 GTO DIAGRAM . 1977 Wiring pic 1. 1977 Wiring pic 2 . headlight vacuum diagram. fuel pump .