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73-87 Chevy _ GMC Trucks => Interior & Equipment => Heating, Ventilation & Air Conditioning (HVAC) => Topic started by: pcwizard on June 05, 2010, 09:35:33 pm

Title: Heater Actuator vacuum Connections
Post by: pcwizard on June 05, 2010, 09:35:33 pm

I removed my heater box to replace the heater core and I have everything back in but there are 2 vacuum lined that go on the back actuator near the firewall. One is Black w\ white stripe and the other one is Black w\ blue stripe and I dont remember how the connect on the back actuator as for as which one goes on which port. Please help as I am in the middle of installing complete change over harness and I need to get these connections right the first time. Thanks in Advance, pcwizard. ???

Title: Re: Heater Actuator vacuum Connections
Post by: ron350 on June 05, 2010, 10:34:57 pm

Hello pcwizard

What year truck and with or without A/C?

Title: Re: Heater Actuator vacuum Connections
Post by: pcwizard on June 05, 2010, 10:37:10 pm

1987 with A/C Thanks, Brent.