I have a chevy S10 4x4 4.3 V6 and have oil in the vacuum lines. on 1998 Chevrolet S10

Also the heater will not change from the vents to the floor.

Asked by for the 1998 Chevrolet S10
1 answer 1 comment
how many miles on car? poss vac isue for heater also
The engine and trans. has been rebuild at about 71,000 miles. The truck itself is pushing 160'000 miles.