# diesel.parts — Frequently Asked Questions

## What is diesel.parts?

diesel.parts is an AI-assisted troubleshooting and parts-discovery website for Class 6–8 trucks. It helps users explore likely causes, checks, and parts, compare exact-part-number supplier listings, and follow trucking industry updates.

## Who is it for?

Owner-operators, fleet technicians, repair shops, and parts-counter users working with Class 6–8 trucks.

## Is diesel.parts a parts seller?

No. It links to external supplier and dealer websites. Orders, payments, shipping, returns, and seller-specific pricing are handled by those sellers, not by diesel.parts.

## How do I compare a part?

Open [Compare prices](https://diesel.parts/#part-number), enter an exact part number, optionally add a manufacturer or brand, and submit the comparison. Sort or filter the returned listings, then open a seller listing or visit a searched seller's website.

## Are the prices live?

Not necessarily. The site distinguishes seller-page listing prices from indexed prices. Indexed prices are not live quotes. Some sources return no usable price. Confirm the current price and final checkout total with the seller.

## Does “No exact listing returned” mean the seller is out of stock?

No. It means this search returned no usable exact listing from that source. The number may be formatted differently, the public listing may not be indexed, or access may be limited. Use the seller's Visit site link to check directly.

## Are shipping, taxes, and core charges included?

No. The comparison excludes these charges.

## Is the cheapest listing necessarily the best deal?

No. Brand, condition, pack quantity, shipping, and other charges may differ or be unspecified. Compare the details and confirm them with the seller.

## Does diesel.parts guarantee diagnosis or fitment?

No. Troubleshooting is AI-assisted guidance. Confirm findings through appropriate inspection and verify manufacturer, part number, fitment, condition, quantity, and availability before ordering or installing parts.

## What happens when I reload a comparison link?

The site looks for a saved comparison without automatically starting a new provider search. If the saved result has expired or does not exist, users must explicitly request a new comparison. Usage allowances apply.

## What is Trucking Pulse?

[Trucking Pulse](https://diesel.parts/#news) provides source-linked trucking news summaries, weekly U.S. and regional diesel fuel price data from EIA, and an archive of the previous 28 completed Eastern calendar days. The scheduled update is at 1:00 AM America/New_York. Daily checks do not make weekly fuel data daily data.

## Does the site offer AI consulting services?

No consulting services are described or offered by the current site. diesel.parts is a truck troubleshooting and parts-discovery tool.