Chevrolet 6.6 LB7 LLY LBZ LMM LML Duramax Oil Cooler Gaskets 2001-2016 Chevy GMC 2500 3500 HD Diesel Turbo

Orders placed on 101 Diesel take approximately 24-48 business hours (i.e., Monday-Friday, Pacific Standard Time) to process before they are ready for shipment. During promotions, holidays, and the months of November & December this processing time may be longer.

Once an order has shipped, you will receive an email notification of the shipment, as well as the estimated delivery date and tracking number. The carriers that Osmo uses (FedEx & USPS) take 24 business hours to update their tracking status.

Generally, the transit time for standard, ground shipping in the U.S. is 5-7 business days, except during the months of November, December, and early January, when shipping volumes are at their peak.

101 Diesel sends three emails regarding the order status, in this order: 1) order confirmation, 2) order shipment confirmation, and 3) order delivery confirmation. The order shipment confirmation includes the carrier and tracking details. These emails are sent to the address indicated on the order.

NO, we do ship to P.O. boxes and APO/FPO addresses due to package size restriction. Please provide a physical address we will have your order send out with FedEx or UPS.

Orders placed on 101 Diesel shipping via ground are handed off to USPS, UPS, FedEx, or a combination of those carriers.
We do not offer expedited shipping options at the moment.
Shipping points are:
U.S. - California, Kentucky, New Jersey, Texas

We accept returns of unused products within 30 days of shipping, except on custom-tuned products.
All core, general and warranty returns must be approved prior to the shipment of the returning product. Upon approval, you will be granted a Return Merchandise Authorization (RMA) number that will tie your return shipment to the return request. This will help us to process your return quickly.
To request a RMA, please fill out this form. You will receive ALL return instructions via email within 1 - 2 business days.

If an order placed on our website is delivered, and it's missing items, or the items contained in the box are incorrect or defective, it's important to reach out to us for assistance within 30 days of receipt through this form:
Contact Us
Shipping errors reported later than 30 days since delivery are reviewed on a case-by-case basis, which may or may not result in a replacement or compensation.