Got my car with dash completely disassembled and reinstalling the climate control box now and need to know where the vacuum hoses route. I have an assembly manual but it is for an 86 and the color codes on the vacuum lines are different than on the 88 apparently.

Where it calls for a yellow vacuum line mine has a brown one but I need to know if the other locations are correct please

 

 

Is the tan the brown one in mine?

 

The diagram that you've posted (Post #2) shows an 84-86 Berlinetta Heater core box. The Heater core box for a "regular" Camaro will be different because it doesn't have a Vacuum Solenoid or the HIGH speed Blower relay as shown in your diagram. ( I'm guessing the vacuum hose colors might be different too.)

Your diagram in Post #3 looks to be correct for the "regular" Camaro / Firebird.

 

Yeah I realize I posted the other car after I'd put the picture on but they did replace the tan one with the brown or the brown is the tan?