I have a 99 chevy lumina will 96 chevy lumina air condishner pump work in my 99 chevy lumina

They are not interchangeable. Can they be made to work, maybe. But they are not a direct replacement.

They show a 5031 as being used in both model years. To change it though you have to pull the steering wheel off. This means special tools etc.

the engine block is the same but their are some changes such as sensors ---computer software -and in 1999 chevys been using dex cool the red coolant verses the green they are not compatible would need to do a flush before using engine but since you have a donor car should be able to do a swap just make sure you grab all and correct electronics with it

Motor mounts might be different possibly.

Do you have power in and out of the turn signal switch ?

Coil, plug or spark plug wire

if i still running have you had the TPS(throttle position sensor)or mass air flow sensor have someone to check the oil pump

After you put the new fuel filter back in, make sure your fuel pump is actually pumping, either by listening for it to start when you turn the key on or by cracking the fitting at the fuel rail (after disconnecting your ignition hot lead first) I assume that you have checked the fuse/relay... rick

Here is a diagram of your motor with the firing order:

hi im wes the firing order is 123456 1 3 5 is on passanger side 2 4 6 is on drivers side