Engine size on 1995 lumina

Go to auto zone and ask for a printout of vacuum diagram for 95 Chevy lumnia /also tell him the engine size

Are you saying the piston will not compress ?

Check the timing belt.

It should be on the larger size metal tube on the right (passenger) side of the car under the hood.running between the right inner fender and the belt drive area of the car, You may have to remove plastic cover to locate pipes,Another place you can check is remove the complete air filter housing near or on the reciever dryer the object that looks like a small canister.

Should just plug in (2 prongs) Not sure if you have Lumina van (on firewall just left of steering column under instrument panel) or sedan/coupe (driver side under dash, on passenger side of steering column)

On your 1995 Chevrolet Truck Lumina Van 3.8L SFI OHV , the Fuel Filter is located: Under vehicle, driver side, below seating area, front of fuel tank, mounted on chassis in fuel line
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ignition switch under coils

lift the rug at edge of the floor right above the bumper there is a big nut turn counter clockwise

On your 1992 Chevrolet Lumina-Sedan/Coupe 3.1L MFI OHV , the Crankshaft Position Sensor is located: Under hood, passenger side, lower engine area, passenger side of engine block, mounted front of crankshaft pulley

if you mean for power locks the same power lock activates all the locks