1998 Chevy Blazer

[quote:9f903dab2a="breze"]Heater problem
1998 Chevy Blazer V8 Four Wheel Drive

where does the vacuum for the blend door begin?[/quote:9f903dab2a]i have looked to try to find a diagram of the vacuum system but have not found anything

The vaccum starts at the intake manifold on the driver side of motor. It then t's off to the evap canister. You can see the hose go in the inside of vehicle at the firewall right behind the motor. These hoses have an issue with becoming brittle and cracking.