I'm suppouse that you have one 4.3L, so check this diagrams...
Fig. 55: 1991 4.3L engine-federal and high altitude
i need a vacuum diagram for a 1990 chevrolet s-10 - 71b4f21.jpg>Fig. 56: 1991 4.3L engine-California
Fig. 57: 1991 4.3L engine-California alternate
Other engine sizes can find in autozone.com (free register).
Hope helped.
Testimonial: "thanks, thats exactly what i was looking for."
SOURCE: vacuum line diagram 98 chev monte
No sticker on underside of hood or on rad support showing that?
SOURCE: I DONT NOW DIAGRAM VACUUM OF CHEVROLET s-10
Check under the hood near radiator or on the hood If not go to the local parts house and open up the book for your truck and write down the diagram ,,, They wont say a thing if you open their HAYNES BOOK
SOURCE: I need a vacuum diagram for a 1988 Chevrolet S-10
Fig. 44: 1989 2.8L TBI engine - federal altitude
Fig. 46: 1989 2.8L TBI engine - California
Fig. 47: 1989 2.8L TBI engine - leaded fuel export without catalyst
Hope help with this (remember rated this).
Fig. 52: 1993 4.3L engine - federal
Fig. 53: 1993 4.3L engine - California
Fig. 54: 1993 4.3L engine - California alternate
Fig. 55: 1993 4.3L engine - federal alternate
Hope this helps.
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