My heater vacuum canister has been bypassed for sometime now because the line had rotted. I've had no problems with vent controls actuating even at idle.

I'm going to be putting in the GM847 next week and was thinking that I could rig this canister to assist with brake vacuum in the event that the 847 doesn't give me enough. Is this possible and if so where would I hook it up too.

THX

 

Just guessing by the difference in the size of the hoses, that the HVAC vacuum tank would not be enough to supply significant vacuum for the booster.