2011-2016 Factory LML Duramax Cylinder Head (Passenger Side) Fleece Performance

Product Returns

Product Return Policy

• Returns must be packaged securely in an outer carton
• Do not write on the product packaging itself. Write only on the outer shipping carton.
• Packages received without a Return Authorization Number written clearly on the outer carton will be refused.
• Returnable items must be received by SUP within 30 days of the product being received by you the customer. (determined by tracking number)
• Returned product must be in new, re-saleable condition, with all original boxes, packaging, parts, cables, manuals, etc.
• Upon receipt, all returns will be inspected, and, at our discretion, credit may be refused or a restocking fee of 5%-10% may be assessed.
• Original shipping cost and shipping protection charges are non-refundable.
• Customer is responsible for shipping costs incurred to return products.
• Products can only be returned for a refund, store credit, or an exchange for the same item. Product cannot be exchanged for a different part number.

Some Circumstances in which credit will not be issued but not limited to:

• Product has been installed and/or used
• Product has been damaged from an attempt to be installed and/or used
• Product is shipped back without original box, manual and/or parts
• Seal on electrical parts is broken
• Product serial number does not match that of which was original shipped to buyer
• Product is deemed not resell able by SUP due to customers own actions in dealing with the product

Core Returns

Core Return Instructions: STOP! Please read to avoid costly delays!

• Step 1:  Verify the core will be received back within 30 days. (See Deadline)
• Step 2: Fill out the Return Form.
• Step 3: Wait for return instructions. SUP will email a return number (RMA) and a return shipping address. Many cores will be sent directly back to the manufacturer, so please read the instructions.
• Step 4: Package the core. Good packaging prevents costly damage and/or the core being refused by the shipping carrier. It may be possible to reuse the box your original product came in. If not, use a box strong enough to support the product. Seal the product in a plastic bag to prevent leaks. Cushion the product with packing material and securely seal the package with tape.
• Step 5: Attach the shipping label you have purchased (see return shipping policy) and write the return number (RMA) large and clear on the outside of the box.
• Step 6: Ship the core.

• No leaking fluids, all fluids must be drained, and the core must be sealed in a plastic bag. 
• The core returned must be a like-for-like make, model, type, and part number.
• Cores will not be accepted from a salvage or junkyard.
• Cores must not be disassembled or have missing and/or damaged major components. 
• Cores must be in rebuildable condition.

Core refund acceptance is at the discretion of SUP and the manufacturer/remanufacture or the original product. Failure to follow the above policy may result in partial credit and/or no credit being issued. If you would like a core returned that has been denied acceptance, you may request that within 30 days and pay for return shipping. Cores that have not been accepted and are unclaimed by the customer after 30 day will be destroyed and disposed of.

Updated 08/22/2024