Replaced fuel pump of 2009 gmc acadia with original manufactured part but car will not start. When cranked, engines attempts to start but fails. Must be computer related. Is there a fix other than hav

Fuel Pump Flow Control Module (LLT)
Mounted under the rear of the vehicle, rear of the fuel tank

I'm not sure...but I would 1st look just inside the rear after you open door. Look on the sides. 2nd look inside the glove box. If all else fails look inside the owners books that came with the vehicle.

Sounds like the magnetic clutch on the compressor may be defective or have an excessive air gap between the drive and driven plates (gap increases with engine temp)..

My Acadia would die while I was pumping gas and then it would take multiple attempts before it would start after filling with fuel.

I changed the purge valve solenoid and haven't had issues since. A new solenoid cost me $60 at autozone

Yes and gm cars it is usually under the car in the fuel line.

Low on coolant- water pump leaking- see dealer for special warranty policy to cover this for free

A very common issue on the 3.6 liter V6 engine in the acadia is a leaky water pump. The pump starts leaking, causing a low coolant level, causing the engine to go into reduced engine power mode to keep the engine from overheating. This usually results in a very extensive cylinder head gasket repair job. You should have a local shop perform a cooling system leak check to find the leak for sure, and an engine block check to see if the overheat condition caused internal engine damage.

Check the condition of the following:

1) Air filter
2) Spark plugs
3) Fuel filter
4) Coil operation
5) Spark plug leads

That's all assuming that the engine turns over. If not:

1) Check power to the starter motor
2) Check battery voltage (should be around 12.5volts or higher)

HAVE VECHICLE CODE SCANNED.YOU HAVE PROBLEM THE THE EMISSIONS AND ENGINE EVAPORATIVE CONTROL SYSTEMS.

replace engine control module