Drizzle the corn with the avocado oil and rub to evenly coat.
Heat grill over medium-high heat (350-400 degrees F) and oil the grill grates (to do to this, dip a wadded paper towel in a little oil and, using tongs, wipe the oil evenly over the grate. Be careful not to use too much oil, because that's a sure-fire way to start a good flare-up—a little goes a long way here.)
When hot, add the corn and cook until tender, about 10-12 minutes total and turning every 2 minutes. Meanwhile, also place the skewers on the grill and cook on the first side for 3 to 4 minutes, or until nice grill marks have formed. Flip the skewers and then baste the grilled side generously with the reserved BBQ sauce, Continue to cook until chicken is cooked through and nice grill marks have formed on both sides, 3-4 more minutes. The grill should be closed as much as possible as you are cooking the chicken. Transfer the corn and the chicken aside and let the corn cool enough to handle.
Meanwhile, in a large bowl combine the lettuce, green onions, tomatoes, black beans, cilantro and basil. Add your desired amount of dressing to the salad and toss until the lettuce is well coated.
Remove the corn from the husk and add to the salad along with the diced avocado, gently toss once more to combine.
Serve with the grilled chicken and enjoy!