1984 GMC Vacuum Line Trace Out SOLVED! Part 2

Part 2: how to trace out your vacuum lines on most vehicles from the late 1970s through the 1980s and into the '90s. I chose this 1984 GMC Jimmy because it offers a complicated system covering all components of the vacuum system including the tip in vacuum switch, distributor, EFE, carburetor, air cleaner, temp sensor, vac motor, manifold vacuum source, EGR valve, EGR bleed solenoid, distributor delay valve, PCV valve, thermal vacuum switch, TVS, air pump, TCC, Auto Trans Lock-Up Torque Converter Switch, deceleration valve, cruise control and the vacuum canister (plus who doesn't love a square body).

Part 1:    • 1984 GMC Jimmy Vacuum Diagram & Routi...