Yes, you can loan money to your LLC. However, there are a few things to keep in mind before doing so. First, you'll need to create a written agreement between you and the LLC detailing the terms of the loan. This agreement should include the amount of money being loaned, the interest rate (if any), and when/how the loan will be repaid. Be sure to have this agreement reviewed by an attorney before signing it to ensure that it's legally binding.
Once you have the loan agreement in place, you can then wire the funds to the LLC's bank account or give them a cashier's check. If you're loaning a large sum of money, it's best to do it via wire transfer so that you have a record of the transaction. When making payments on the loan, be sure to keep good records so that you can show proof of payment if needed later on.
If everything is done correctly, loaning money to your LLC can be a great way to help finance its growth or cover unexpected expenses. Just be sure that you understand all of the legal implications before moving forward with this type of transaction.