PCM1 fuse keeps blowing - 2005 Chevrolet Suburban

Ok you have mass air flow sensor, evap canister solenoid and a fuel compensation sesnor on that circuit . I would look at the mass air flow but before you do that look under the truck at the front drive shaft for the 4wd by the transfer case and make sure that nothing is rubbing against the shaft like a wire harness. Some of the trucks have a harness that may rub on the drive shaft and cause all kind of problems. If there is no harness near the drive shaft try moving the main harness at the top rear of the engine ( that's between the bulk head and the engine ) by pulling and pushing the harness to make sure it has not been cut through on the body of the truck. Finding a direct short cand be hard. just take the time to look at things and that means looking for pinch, cut and/ or any damage componets. Good luck