GMC Repair: BLOWN FUSE, mass air flow sensor, mass air flow

Question
I HAVE A 1999 GMC SUBURBAN THE ENG 1 FUSE UNDER THE HOOD KEEPS BLOWING I PUT A NEW ONE IN AS SOON AS I START MY CAR THE FUSE BLOWS PLEASE HELP

Answer
Hi
That fuse feeds these items
1)Evap Canister Vent
2)Mass Air Flow Sensor
3)Camshaft Position Sensor
4)A.I.R. Relay, (If equipped)
5)EVAP canister Purge Solonoid
6)LH Heated Oxygen Sensor
7)RH Oxygen Sensor.
All wires need to be checked for a short to ground.
see if there is any of the o2 sensor wires burned on the exhaust.
I hope this helps.
Follow post back if more help needed.
Pawl