Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
HelloCustomer I hope these help.
Your JA Expert,
I don't have a better picture but if the only lines that should be in question are the 2 smaller lines. If you look at the bottom picture it shows the 3 lines at the switch. I believe the large line goes to the actuator on the front differential. That leaves the 2 smaller lines. If you blow through the switch when in 2 wd. you should have flow between 2 terminals. One of those will be the vacuum supply and 1 should be the vent. If you start the car, you will have vacuum present at one of them. That is your vacuum supply line. The other line should be open to the atmosphere. Guess on the placement for the 2 smaller lines. Switch it to 4wd. You should get vacuum on the larger hose. If you don't switch the 2 smaller hoses and recheck.