We Are Your Parts Distribution Network. Alliant Power Central Distributors and Service Dealers are diesel service professionals--experts in the care and maintenance of diesel-powered vehicles. We have what it takes to get the job done right, and we make it easy for you to ensure your Original Equipment (OE) product is the product of choice for aftermarket service. The aftermarket parts and service market needs genuine OE products to ensure form, fit and function when servicing the customer. They need the right parts shipped—promptly and accurately, with appropriate technical support. That's what we do.