FAQ's / Disclaimers

Q: Is USDieselParts.com a real business, or do you just operate a website?

USDieselParts.com is an online extension of Gomer’s Diesel, which is a real “brick and mortar” facility that began business in 1938 and is still going strong in Missoula, MT. We have a 20,000 square foot facility with a customer showroom, parts department, fuel injection and turbocharger rebuild shop, a vehicle repair shop with 7 bays, 3 vehicle lifts and a Mustang MD-1100 dyno. We have a full staff of dedicated and knowledgeable folks that can help you with any diesel related questions you have and find the parts you need quickly.

Q: How do the online Gift Certificates work?

Some products on our website include a free Gift Certificate that is good towards your next online purchase at USDieselParts.com. When you purchase an item that includes a free Gift Certificate, you will be sent a unique code that you can use during your next online purchase to redeem your Gift Certificate. This unique code is only redeemable by the purchaser of the original product.

Q: How do I return items purchased with a gift certificate?

Items that were purchased with a gift certificate cannot be returned for cash refunds. If you purchase a product with a gift certificate and wish to return it, then you will be issued a new gift certificate in the amount of the original purchase of the item. Restocking fees will be deducted from the new gift certificate.

Q: I was told that my parts are on backorder. Why?

Occasionally the manufacturers we order our parts from can run into production problems that may prevent us from keeping those items on our shelf at all times. If you order an item that we don't have in stock, then we'll contact you to let you know that your order has been placed on backorder. This means that we intend to fill your order as soon as your item(s) are available.

Q: Pricing Disclaimer

We do everything we can to ensure that the prices our site are correct, for our products and for those sold through us from multiple manufacturers. Sometimes errors are made. Products prices from so many manufacturers can change on a daily basis. Part #'s can change - be superseded - be on back-order - or may even be no longer available.

Prices may be changed at any time without notice and we reserve the right to change our product's prices at any time without further notice. However, if you have ordered a part or product that is no longer available, has changed in price or was priced in error - this can be handled in a few different ways:

  • We will always try to come to an agreement on the changed cost or even a discount off the correct cost if a product was priced in error.
  • If a product has been superseded we will either try to send out the updated part for a matched price or contact you if the price difference between the two is too great.
  • If a product has gone into back-order status we will contact you with an estimated time the part will be available again or to see if a similar part will work if available.
  • If a product is no longer available we will contact you to see if a similar part will work and an agreement on cost can be made.
  • If an agreement cannot be reached, for any reason, the full cost of the order will be refunded before the order is canceled.

Gomers Inc. and/or US Diesel Parts is not liable or obligated to sell a product at an advertised price if the pricing was made in error. We try very hard to keep our prices competitive and fair but DO NOT condone the use of bait-and-switch tactics. Please understand that mistakes can be made and we will always try to work with a customer or client to come to an amicable agreement.


Shipping & Returns / Purchase Order Terms

Q: Purchase Order Terms

When making an order through US Diesel Parts you are agreeing to the below terms of service and related terms for returns, warranty and customer obligations for core return and eligibility for qualifying acceptance for each in question.

Q: Free Shipping Availability

As you browse through our website, you'll notice that we do offer free shipping on many items. Our free shipping offer is only good for select items that are marked to include free shipping, and the order must be shipped to an address within the lower 48 states within the United States. Orders shipping outside of the United States (lower 48) do not qualify for free shipping. Also, if you return an item for a refund that included Free Shipping, then the shipping charges that we paid to deliver it to you will be deducted from your refund.

Q: California Tax / Use Tax

All sales shipping to California require a City & County Sales Use Tax. This tax will be assessed by City & County of your shipping address and then charged after your purchase. We apologize for this inconvenience. If you are unsure of your local tax rates, please see: https://www.cdtfa.ca.gov/taxes-and-fees/rates.aspx

IMPORTANT! All orders are assessed Use-Tax AFTER an order is placed. This is due to each City or County having its own tax rate between 7.25% & 11.75% and our websites web-cart not having a variable tax rate by zip code option at this time. We apologize for it not being auto-calculated at time of purchase. You can and should estimate your final cost by using the link above to find your tax rate and adding it to your orders total, do not include shipping costs when calculating.

If using PayPal or Affirm for your order, we will need to contact you for a credit card # or to send a money request through PayPal for the unpaid Use-Tax. We will not be able to ship and item until the unpaid Tax is paid in full. If you purchased with a credit card, the Use-Tax will be automatically charged after being assessed and your item will continue processing to shipment.

Q: Order Shipping Time

UPS / FedEx orders that are placed by 12pm MST on Monday through Friday (except holidays) will generally ship on the same day. Orders placed after 12pm MST will ship the following business day.

Some products have build-times or extended processing times but are typically noted for how long it may take before shipment. Build-Time does not include the time for arriving after shipping - Example: if an item has a 2-3 day Build-Time, it will take 2-3 days to build and will then ship out. It then take as long a time for delivery as was selected for shipment method.

We cannot guarantee same day shipments or what carrier is used on orders that are drop-shipped from other warehouses due to item availability, different time zones and warehouse policies. If there are any known delays then we will attempt to contact the customer as soon as possible. If it is important that you receive your item by a specific date, then please call us to verify availability and discuss shipping options.

Q: Shipping Options

When you finalize your online order with us, you will have the choice of using several options from UPS. However, sometimes we may have to use an equal service from the another carrier depending on where your order is shipping from and the final destination of your order. If we do use another carrier such as USPS or FedEx, then we will make every attempt to see that you still receive the item as fast or faster than the UPS service that you chose. If it is important to you that a particular shipping service is used, then please call or email prior to your order to discuss your options.

Q: Delivery Times

If the item you ordered isn't immediately available to ship, then we will make every effort we can to contact you. However, many other things can affect the delivery time of your order such as:

  • time of day the order was placed
  • weekends or holidays
  • increment weather
  • mechanical problems
  • back-ordered item

Please keep in mind that expedited delivery services do not apply to weekends or holidays. For example, if you order an item on a Friday and choose UPS Next Day Air, it will arrive on the following business day (not Saturday). If you need an item to be delivered on a weekend or holiday, then please call us at (800) 823-4444 to discuss your options.

Shipping companies do not guarantee delivery times during major holidays or during increment weather. Please allow extra time for deliveries during these times. You can also contact us to verify availability and to discuss expedited shipping options if it is important that you receive your order by a specific time.

Q: Shipping outside the USA

We no longer ship internationally other than Canada. The main reason for this is our industry deals in products that require a core return for rebuild and re-manufacture. The costs to do so internationally have gone up considerably and the reliability of receiving back a usable core have gone down in turn.

Q: Shipping to Alaska, Hawaii or Canada.

Yes! We do ship to Alaska, Hawaii & Canada. However, shipments to those areas are excluded from our Free Shipping offers. It should also be noted that our website isn't very good at calculating shipping charges outside of the lower 48 states, so the shipping rates calculated during checkout may be subject to additional shipping charges. This is rare, and if it does happen, then we will contact you.

Q: Shipping to APO/FPO addresses

Yes, we are happy to ship to APO/FPO address' through our website. However, if you experience any problems with an APO/FPO address during checkout, then please call us and we will help complete your order over the phone.

Q: Shipping Through Freight Forwarders.

We do NOT ship to Freight Forwarders. There are no exceptions. If you place an order and use a freight forwarding company as a delivery address, then your order will be canceled and refunded.

Q: Back-Ordered Products or Parts

Occasionally the manufacturers we order our parts from can run into production problems that may prevent us from keeping those items on our shelf at all times. If you order an item that we don't have in stock, then we'll contact you to let you know that your order has been placed on backorder. This means that we intend to fill your order as soon as your item(s) are available.

Q: Returning an item purchased online

New Returns
Un-used, non-defective or non-warranty items purchased online can be returned for Refund or Store Credit within (45) days after the date of purchase. Products considered Special Order items are non-returnable. The original purchaser will be responsible for creating the return label and return shipping charges. A 10% restocking fee for non-defective returns may also apply. The returned item must be in good condition in it's original packaging and can not have been installed or used in any way. If you would like to return a new or un-used item that you purchased online, please call us at (800) 823-4444 and ask to speak with one of our parts specialists. They will give you a Return Merchandise Authorization number (or RMA) to include with your return. It will also help speed up the return process if you include a copy of your original invoice. Also, please make sure and include your contact information so that we can contact you if needed.

Warranty Returns
Defective items that are still within the manufacturers warranty period may be returned for an exchange or refund depending upon the manufacturers policy. Items that have failed due to improper installation and/or negligence in correct usage by the purchaser/owner are NOT eligible for warranty return in any situation.

Warranty Return Process
A Warranty Request Form should be filled out before sending in any part for warranty return. This form can either be filled out electronically and emailed, or you can print and write out your information. Please complete the form to the best of your ability. The more complete the information we receive, the faster we can facilitate a refund or replacement. It will also help speed up the return process if you include a copy of your original invoice. Prior to sending in your part, please call us at (800) 823-4444 and speak with one of our parts specialists. They will give you a Return Merchandise Authorization number (or RMA) to include with your warranty return.

Q: Returning items purchased with a gift certificate

Items that were purchased with a gift certificate cannot be returned for cash refunds. If you purchase a product with a gift certificate and wish to return it, then you will be issued a new gift certificate in the amount of the original purchase of the item. Restocking fees will be deducted from the new gift certificate issued.

Q: Restocking Fees

Returns of non-defective items for refund are subject to a restocking fee to cover costs associated with handling and invoicing. The restock charge is calculated on the total cost of your original invoice (not including shipping costs). Restock charges do not apply to warranty returns or exchanges for items of equal or greater value.

Core Returns

Q: Core Return Policy

Core returns must be sent & received within 45 days after your new part arrives to you. If we have not received your core after 45 days, or been contacted with information on when the core will arrive, the order will be marked as "No Core Returned" and the core charge will no longer be refundable.

If a core return has gone over the 45 day return limit, the cash value of that non-return is then used to purchase another core to keep the remanufacturing process going. This ensures a rebuilt product will be available for the next customer.

Q: What is a core?

A "Core" is simply your old part or part's. When a product is sold as rebuilt or remanufactured, you have to send in your old part so it can be rebuilt to sell to the next customer. This is VERY important because many products are no longer in production so the only way to get them is to rebuild old parts back to new or better quality.

Q: Core Acceptability

In order for a core to be accepted for a refund it MUST meet the following criteria:

  • Cores must NOT be damaged and must in a rebuildable condition - If a part is cracked, siezed, been on fire (or appears to have been) it will NOT be accepted.
  • Cores must be Like-For-Like. You cannot send in a part from a differnt model, make, or year. Example: you cannot send in a Chevy 350 Transmission core if you bought a Dodge NV4500 Transmission.
  • Cores must be returned within the 45 day return window - No acceptions will be made unless you contact us before then to extend the return time.

Q: When will I receive my refund?

Refunds are quick! A refund will be made through the purchasers’ payment method typically on the same day it is received. From there is depends upon the purchasers’ bank or account on how fast the refund shows up as available. Accounts such as PayPal are almost instant while some bank accounts can take up to 3 to 10 days to process.


Warranty Request

Q: How do I request a Warranty?

Warranty Return Process
A Warranty Request Form should be filled out before sending in any part for warranty return. This form can either be filled out electronically and emailed, or you can print and write out your information. Please complete the form to the best of your ability. The more complete the information we receive, the faster we can facilitate a refund or replacement. It will also help speed up the return process if you include a copy of your original invoice. Prior to sending in your part, please call us at (800) 823-4444 and speak with one of our parts specialists. They will give you a Return Merchandise Authorization number (or RMA) to include with your warranty return.

Note: In order to fill out the PDF file you must save it to your computer and then open it with Adobe Acrobat Reader which is a free download from adobe.com. If you try to fill out the document through your web browser, it will often NOT save your information. Once you have filled out the form with Adobe Acrobat Reader, we suggest before closing the document, save the document under a different name and then open that file to make sure your information saved correctly.

Valid Warranty Situations
Defective items that are still within the manufacturers warranty period may be returned for an exchange or refund depending upon the manufacturers policy. A Manufacturer Warranty must be filed with the part manufacturer directly as opposed to sending to us to cover warranty. An example of this would be a FASS Fuel System because in order to retain warranty you must register the equipment with FASS upon installation. Items that have failed due to improper installation and/or negligence in correct usage by the purchaser/owner are NOT eligible for warranty return in any situation.