vacuum lines for the a/c heater controll - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mattopia · 03-13-2003, 05:10 PM

Where does the vacuum line go for the selector. Is it on the selector or on the unit under the dash. Also is it a constant or timed vacuum? Thanks

79BIG10 · 03-14-2003, 06:17 PM

I'm not sure where the vacuum is at under the dash but it mounts to the ball on the passenger side firewall by the condenser? and is mounted usually to a T fitting behind the carb on the manifold. the T is for the manifold, heater hose, and usually the auto tranny vacuum modulator (has a rubber hose to a steel line).

twistedmetal · 03-15-2003, 05:48 AM

Mattopia,what color of hose is it. Eg. black w/ orange stripe

**swervin ervin** · 03-15-2003, 06:55 PM

Quote:

Originally posted by 79BIG10
I'm not sure where the vacuum is at under the dash but it mounts to the ball on the passenger side firewall by the condenser?

Not always the case Brandon. My 85 has the vacuum ball on the drivers side, mounted on the inner fender in the corner of the firewall.

apstguy · 03-15-2003, 08:12 PM

I don't know about you guys, but my vacuum ball is only hooked up to the cruise control system.

79BIG10 · 03-16-2003, 05:07 AM

Quote:

Originally posted by swervin ervin

Not always the case Brandon. My 85 has the vacuum ball on the drivers side, mounted on the inner fender in the corner of the firewall.

Thanks for the tip Mike.

03-13-2003, 05:10 PM	#1
mattopia Registered User Join Date: Sep 2002 Location: Indianapolis Posts: 49	vacuum lines for the a/c heater controll Where does the vacuum line go for the selector. Is it on the selector or on the unit under the dash. Also is it a constant or timed vacuum? Thanks

03-14-2003, 06:17 PM	#2
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	I'm not sure where the vacuum is at under the dash but it mounts to the ball on the passenger side firewall by the condenser? and is mounted usually to a T fitting behind the carb on the manifold. the T is for the manifold, heater hose, and usually the auto tranny vacuum modulator (has a rubber hose to a steel line). __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

03-15-2003, 05:48 AM	#3
twistedmetal Take it to the limit Join Date: Mar 2003 Location: Manitoba, Canada Posts: 145	Mattopia,what color of hose is it. Eg. black w/ orange stripe __________________ 1995 GMC SLE Ext cab 4X4 Z-71 loaded daily driver 87 k25 Fully Loaded inc captain buckets and console,12" susp lift,3" body lift 42"swampers 66 Cutlass 2dr hardtop currently undergoing frame off 55 chev 2dr hardtop awaiting attention 85 Chev silverado 1/2 ton loaded,daily driver(stolen) 80 chev silverado 1/2 ton farm truck 87 S-jimmy V-8,lowered ,Parting out 49 Chev 1/2 parting out parting numerous 73-80 chev trucks 01 Polaris edge X (highly modified) 58 NSU Prima scooter awaiting total restoration

03-15-2003, 08:12 PM	#5
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,087	I don't know about you guys, but my vacuum ball is only hooked up to the cruise control system. __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32

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