Gain extra benefits by becoming a Supporting Member Click here find out how!
Gold ***Platinum***
Sting Ray (10)crusier (2)don.franken58 Bel Air Mark (2)Joe58nstlga (10)drew1987 (2)Fishbone (3)Johnny468  (7)fantm2flyer (2)motthollow (5)409Corvair 2dr150 (9)Carl1962 (3)joeray58 T57 (7)alltak (7)4spd409 (9)Mr LuckyNednz1for53Red402jim24 CABENELSONBackrodebobCarguy1965 (5)chevygenie (9)rbiman beagrizzly (7)MikeUSNRet 66conv (2)Nathan89 Evhfan2000 (4)tommy49 (2)
alans 55 (14)rockfangd (2)
57 handyman (4)
pale warrior
1960_Guy (4)
Jim McCall (6)
rooks (4)puzzley (12)
HYPR (14)
Classic Performance Products Classic Parts
Ciadella InteriorsAmerican Auto Wire Ecklers AutoMotive
Exile® Battery Keeper™ 6/12 volt charger w/ LED battery monitorClassic Industries
Hellwig Products IncPerformance Rod & Custom
Impala Bob's Bob's Chevy Trucks Bob's Chevelle Parts Bob's Classic Chevy

LMC Truck Join the Community today Join Us Now

Username Post: Vacuum diagram for 75 Chevy 350 4Bbl        (Topic#12948)
Posts: 2

Loc: Fresno, CA USA
Reg: 12-03-02
12-03-02 12:31 PM - Post#85332    

I am a public reference librarian with the San Joaquin Valley Information Service in Fresno, CA. I have a patron who is looking for the vacuum diagram for his 1975 Chevy 350 truck. It's a 4 Bbl. I don't know if it's California or Federal. The only diagram I found for a 1975 was from "Mitchell's 1969-78 Vacuum Circuits Domestic Cars, Light Trucks & Vans". It was a very rough picture of the engine and did not match the patron's engine. I found some GM Truck Emission Control diagrams for the 1976 year in the same book which might work, but I'm not sure. They have several for a 350 4 Bbl. I noticed that some of you may have access to the ChiltonOnline service, but I am not a subscriber. Our library subscribes to Alldata, but that only goes back to the mid 1980s. Does anyone in this forum have the exact diagram I'm looking for or know of a source? Would the '76 diagrams work? Any clues would be much appreciated. It would make my patron very happy. Thanks for your help.

Kathleen Smith, Librarian
San Joaquin Valley Information Service
Fresno, CA

LMC Truck
Senior Member
Posts: 416
Loc: Mobile, Alabama
Reg: 10-12-02
Re: Vacuum diagram for 75 Chevy 350 4Bbl
12-03-02 02:52 PM - Post#85333    
    In response to kksmith1

Kathleen....I think the '76 diagrams will be the same as the '75 models. I have the '75 service manual and it is just a supplement to the '74 manual. The emissions changed in '75, so the '74 book would be wrong. My '75 book does not show any vacuum diagrams. There are service manuals for sale at I hope this helps you.


1987 4x4 Shortbox Stepside

1987 4x4 Shortbed Stepside

Posts: 2

Loc: Fresno, CA USA
Reg: 12-03-02
Re: Vacuum diagram for 75 Chevy 350 4Bbl
12-04-02 01:28 PM - Post#85334    
    In response to 87BlkStepside

Bill, thanks for the quick response and a confirmation that what I have for '76 might work for my patron. I'm delivering them to him today so we'll hope for the best. I also gave him the URL for in case he wants to jump in himself and join this good knowledge base. Thanks again.


"2nd Year" Silver Supporting Member
Posts: 10706
Loc: The cold wet and windy O...
Reg: 03-10-01
Re: Vacuum diagram for 75 Chevy 350 4Bbl
12-04-02 05:52 PM - Post#85335    
    In response to kksmith1

Kathleen.... it's not a good knowlege base...
It's GRRRREEAT. (that's my Tony the tiger impression)
The spelling here may not always be good, but the advise is very good. There are a lot of very knowledgeable folks here. Info your patron could appreciate.
The other place on Chevy Talk to ask this type of question might be on the Performance section.

( be sure to remind your patron to ask questions quietly, so as not to bother the others who are studying here...... and.... no smoking.


~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~
If plants ruled the world, would they regulate oxygen?

LMC Truck
Icon Legend Permissions Topic Options
Report Post

Quote Post

Quick Reply

Print Topic

Email Topic

Recent Hot Topics
Current Quote
"I am amazed by how knowledgeable and helpful folks on this forum are, and I am grateful for any help you may send my way."
~ Supporting Member
Recent Topics
FusionBB™ Version 2.1
©2003-2006 InteractivePHP, Inc.
Execution time: 0.844 seconds.   Total Queries: 27   Zlib Compression is on.
All times are (GMT -0800) Pacific. Current time is 07:17 PM