Beat the Cold Snap

Every winter filter for your diesel, in one box

Four kits built for your engine and year: the winter filters your truck takes plus Winter Flow 24/7, in one box.

Find my kit
A Doc's Diesel filter kit with oil, air filter and fuel filters on a shop workbench

Skip the shop bill

The filters your truck's service calls for, plus Winter Flow 24/7 fuel treatment, ship together in one box. No parts-counter runs, no guessing which filter fits.

  • $199Dealer quote, fuel filter
  • About $30Done in 10 minutes
“I asked how much they wanted to do the fuel filter and was quoted $199. I decided to do it myself and within 10 minutes I had my fuel filter changed for about $30.”
Beth M., Duramax owner

Four kits. Pick how far you go.

The exact parts depend on your engine and year. You'll see your truck's part list before you add anything.

Starter kit parts

Starter

The cold-weather basics

  • Fuel filter
  • Winter Flow 24/7 fuel treatment
See it for my truck
Standard kit parts

Standard

A full filter service

  • The filter maintenance kit for your engine
  • Winter Flow 24/7 fuel treatment

Which filters depends on the engine. Your truck's list shows each one.

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Complete kit parts
Most complete filter job

Complete

Filters, oil and cold-start backup

  • Your filters
  • Full-synthetic oil in your engine's weight, on most trucks
  • Winter Flow 24/7 fuel treatment
  • SOS Cold Weather Diesel Rescue

Your truck's kit names the oil weight and gallons, or says if oil isn't included.

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Ultimate kit parts

Ultimate

Engine and transmission service

  • Everything in Complete
  • Transmission service kit for your transmission

Offered where one transmission kit fits your truck.

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Why owners buy from Doc's

  • 4.8 out of 5 From 12,124 reviews
  • Check the part numbersEvery filter lists the OEM and aftermarket numbers it replaces, so you can match it to what's on your truck.
  • Free shipping over $99

    On contiguous US orders. Returns and warranty

1Pick your truck

2Pick your kits

Pick your engine and year above to see the kits that fit.