hello i'm new here
 

Hello Truck peeps
I have recently bought a 2004 Gmc Sonoma 4x4 4.3 liter v 6 sl5 it drove good until i decided to go out of town and started to go up the hill and lost all power, since then i have changed the both oxygen sensors, distributor cap and rotor, plugs and wires, cam shaft position sensor, crank shaft sensor, mass air flow sensor, manifold pressure sensor,ignition coil, throttle position sensor, fuel pump and fuel filter, seemed to be driving better but still loss of power going up hill, I then changed the engine oil and oil filter now its hesitating on take off and jumps RPM's up and down when stopped in idol, the code just keeps saying mass air flow sensor, I'm at a loss here guys so I'm here asking advice on what to do next.