As Dave mentioned, there is also a (TCS)Transmission controlled spark advance solenoid attached to the carburetor, and that also gets 2 vacuum line connections. The thermo vacuum switch on the intake manifold has 3 nipples that should be marked MT, C, and D. MT is manifold vacuum, C is ported vacuum, and D is to the distributor vacuum advance.. I picked up a buick 3.8 motor, to put into my girlfriends 81 Malibu. te motors just about done but I am having issue getting a vacuum diagram for the emissions equipment. I have the 2 barrel carb, has the exhaust butterfly in the manifold, has egr as well as a valve th an electrical connector and vacuum ports that sits on the pass valve cover.
Here we have a 1977 1978 VACUUM and WIRING Diagrams Manual Set. This is the complete section from the Master manual and is a great, comprehensive and complete diagram set great for any owner.. 1977 1978 BUICK LESABRE RIVIERA WIRING VACUUM DIAGRAMS SCHEMATICS SHEETS SET. Vintage Auto Literature and Manuals (226668) 94.7% positive; Seller's.. Classic Industries offers a wide selection of Literature for your 1977 Buick LeSabre. Classic Industries offers Shop Manuals. Trustpilot. 1.800.854.1280.
![[DIAGRAM] 2000 Buick Lesabre Vacuum Hose Diagram](http://ww2.justanswer.com/uploads/Chevtek/2011-09-18_023523_2011-09-17_203501.png "[DIAGRAM] 2000 Buick Lesabre Vacuum Hose Diagram")
![[DIAGRAM] 1993 Buick Lesabre Vacuum Lines Diagram](http://repairguide.autozone.com/znetrgs/repair_guide_content/en_us/images/0900c152/80/25/19/81/large/0900c15280251981.gif "[DIAGRAM] 1993 Buick Lesabre Vacuum Lines Diagram")
![[DIAGRAM] 1993 Buick Lesabre Vacuum Lines Diagram](https://static.cargurus.com/images/site/2014/09/11/12/54/pic-764521522443908944-1600x1200.gif "[DIAGRAM] 1993 Buick Lesabre Vacuum Lines Diagram")
![[DIAGRAM] 450sl Vacuum Diagram Heater](http://www.chicagocorvette.net/images/diagrams/large/C-HEATER-04-heater-control-vacuum.gif "[DIAGRAM] 450sl Vacuum Diagram Heater")
![[DIAGRAM] 1993 Buick Lesabre Vacuum Lines Diagram](https://www.2carpros.com/images/question_images/5910/original.gif "[DIAGRAM] 1993 Buick Lesabre Vacuum Lines Diagram")
![[DIAGRAM] 1993 Buick Lesabre Vacuum Lines Diagram](http://www.justanswer.com/uploads/travist80/2009-02-20_000744_486344.JPG "[DIAGRAM] 1993 Buick Lesabre Vacuum Lines Diagram")
![[DIAGRAM] Mustang Vacuum Diagram 1967 Wiring And Diagrams MYDIAGRAM](https://ww2.justanswer.com/uploads/JHoop/2010-12-23_141326_1.jpg "[DIAGRAM] Mustang Vacuum Diagram 1967 Wiring And Diagrams MYDIAGRAM")
![[DIAGRAM] 1993 Buick Lesabre Vacuum Lines Diagram](http://repairguide.autozone.com/znetrgs/repair_guide_content/en_us/images/0900c152/80/0b/13/ff/large/0900c152800b13ff.gif "[DIAGRAM] 1993 Buick Lesabre Vacuum Lines Diagram")
![[DIAGRAM] 1993 Buick Lesabre Vacuum Lines Diagram](https://i2.wp.com/www.jedi.com/obiwan/jeep/wagoneer/pics/vac_advance_v8b.png "[DIAGRAM] 1993 Buick Lesabre Vacuum Lines Diagram")
![[DIAGRAM] 1993 Buick Lesabre Vacuum Lines Diagram](https://ww2.justanswer.com/uploads/PE/PENTICO/2012-12-27_195302_century1.gif "[DIAGRAM] 1993 Buick Lesabre Vacuum Lines Diagram")
![[DIAGRAM] 1977 Pontiac 400 Vacuum Diagram](https://www.thirdgen.org/forums/attachments/carburetors/139013d1180024571-picture-vacuum-diagram-1986-85344120l-exc.gif "[DIAGRAM] 1977 Pontiac 400 Vacuum Diagram")
![[DIAGRAM] 1985 Buick Lesabre Vacuum Diagram](http://www.justanswer.com/uploads/ebrock63/2008-11-26_203232_2008-11-26_132847.png "[DIAGRAM] 1985 Buick Lesabre Vacuum Diagram")
