Difficulty: Easy
Don't make the mistake i made and shoot at the motorcycles. Hit the drivers instead as it's more effective. Sheva is useful at this part as she'll usually point to the Majini before they enter your field of vision.
Enter El Gigante
This guy is an absolute pain on higher difficulties, but there are a few things that will help.
Firstly, keep an eye on the red bar for the turret. Don't let it overheat.
Keep shooting the guy when he raises his foot ready to stomp. It appears that hitting him anywhere will stop him from stamping. Just keep firing.
Be prepared for a quick time event when he swings the wooden post or stun him by shooting a barrel.
Shoot the boulder until it breaks, or he'll throw it at the Jeep.
Kill the Majini archers on the right. Don't let them chip away at your health.
Note: Obvious weak points are the exposed Plaga coming from his wounds.