Professional™ Steering Pitman Arm (45C1121) by ACDelco®. Quantity: 1 per Pack. An ACDelco Professional Steering Pitman Arm is manufactured to provide a stable pivot point with the least amount of friction, and is a high quality aftermarket replacement ideal for many vehicles on the road today. This pitman arm connects your vehicle’s steering gear to the steering linkage. This premium aftermarket replacement component is manufactured to meet your expectations for fit, form, and function.