Reproduction radiator overflow jar or coolant recovery tank for 2007-10 Chevy Silverado and GMC Sierra 2500HD 3500 Pickup with Duramax 6.6L Diesel engine. Manufactured to correct configuration replicating the original in appearance and fitment. This tank replaces GM part number # 15120611 or Partslink # GM3014129. Includes 20 lb. pressure cap to replace OE part # 13502353.