Bring a large pot of salted water to a boil. Add the elbow macaroni and cook according to the package instructions until al dente, about 8-10 minutes.
Drain the pasta in a colander and rinse under cold water to stop the cooking process. Let it cool completely.
In a large mixing bowl, combine the chopped dill pickles, red onion, celery, and bell pepper.
In a separate bowl, whisk together the mayonnaise, pickle juice, garlic powder, salt, and black pepper until smooth.
Add the cooled pasta to the vegetable mixture in the large bowl. Pour the dressing over the pasta and mix gently until everything is well combined.
Adjust seasoning as needed, then cover the bowl with plastic wrap and refrigerate for at least 30 minutes to allow the flavors to meld.
Before serving, give the salad a good stir and sprinkle with fresh dill if using.