S10/T10 Blazer 4WD V6-262 4.3L (1989)
Vacuum Harness HVAC: Service and Repair
Vacuum Harness - Dash - Color Coding
VACUUM LINES - INSTRUMENT PANEL
Air conditioning systems use vacuum lines molded to a connector which is attached to a vacuum control switch on the control assembly (see
accompanying figure).
In case of leakage or a hose collapse, repair by cutting the hose and inserting a plastic connector. If an entire hose needs replacing, cut all of the hoses off
at the connector and then attach the hoses directly to the control assembly vacuum switch.