Hello I have a 2000 4x4. I just replaced the 4.3 engine and i am having problems getting the transmission vacuum hoses back in proper place. No I did mark them when i removed the engine (that was my biggest mistake) but now that that is done I need help figuring out where the 3 vacuum hoses go. This is a push button 4 wheel drive and the 4lo button stays lite. When driving it is very slugish when it goes into 2nd gear, i am hopeing this is also because of the vacuum problem. If any one has a schematic of this that would be great. Any help would be greatly appreciated and my kids would also be thankfull because i am beyond frustrated with this.

 

Do you have the 3 or 4 button 4x4 switch on the dash ???

 

i have the 3 button 2HI 4HI 4LO

 

Ok, first you have a vaccuum line that runs from under your battery up the passenger side of the engine compartment and along the fire-wall and to the bottom of the small tee fitting in front of the brake power booster, the right side of that small tee goes to the air conditioning vaccuum line that runs through the fire-wall, the other vaccuum line goes to the bottom of another bigger tee, the right side of that tee goes to the air canister that is inside your driver side fender and the other side of that tee goes to the manifold just under the PVC valve. Both of these tee's are located in front of the brake power booster. I would recommend replaceing all of these vaccuum lines, mine were all weathered. If this doesnt take care of your 4 lo light you will probably have to replace the 4x4 switch on the dash, they are about $25 on e-bay.