How Often To Change Fuel Filter On Duramax

6.6L Duramax Fuel Filter Service

2001 - 2016 Duramax Diesel Water Separator & Fuel Filter Replacement Guide

Applicable Models:

2001 - 2016 Chevrolet Silverado 2500 HD, 3500 Hard disk
2001 - 2016 GMC Sierra 2500 Hd, 3500 Hard disk drive

Applicable Engine(s):

half dozen.6L Duramax diesel (LB7, LLY, LBZ, LMM, LML)

Fuel Filter Service Interval:

2001 - 2010 model years: xv,000 miles
2011 - 2016 model years: 22,500 miles or equally prompted past instrument cluster display

The fuel filter housing is located on the passenger side of the engine and features an integrated fuel plunger in guild to prime the fuel organization subsequently replacing the fuel filter. Notation that this plunger is required to bleed the fuel organisation of air after installing a new filter since the 2001 to 2016 Duramax diesels practise non employ an electrical lift pump. Failure to bleed air from the fuel organization before starting the vehicle may place additional strain and excessive wear on the high pressure injection pump.

GM recommends replacing the fuel filter and draining the fuel h2o separator at fifteen,000 mile intervals on 2001 to 2010 model year vehicles, and every 22,500 miles (or as prompted through the instrument cluster display) for 2011 to 2016 model year vehicles. Removal of the passenger side inner fender is recommended and permits complete and easy access to the fuel filter housing associates.

Duramax Fuel Filter Part Numbers

Part Clarification	Part Number(due south)	Remarks
Fuel filter	ACDelco TP3018	[i]
Water-in-fuel sensor assembly	ACDelco 12639277	[2]
Fuel filter hosing drain screw	GM 97363195	[3]
Inner fender clips	GM 21030249	[4]

[1] - Fuel filter uniform with 2001 to 2016 model year Duramax diesels.
[ii] - Water in fuel sensor assembly uniform with 2001 to 2011 model yr Duramax diesels.
[3] - Bleed spiral includes o-ring seal.
[iv] -Inner fender clips tend to intermission and are rarely reused; inexpensive and piece of cake to replace.

How to Replace the Fuel Filter on a 2001 to 2016 Duramax Diesel

Click any thumbnail to view fullsize, detailed image

• The fuel filter is located on the passenger side of the engine below the air intake tube.

• Remove the center air intake tube (between air filter housing and turbocharger inlet mouthpiece).

• Remove the passenger side inner fender (secured by a series of plastic torso clips).

• Optional - Attach a modest section of 1/4" fuel hose to the water-fuel separator drain valve located at the bottom of the fuel filter. Open the bleed screw at the acme of the fuel filter housing, then drain the water separator into a suitable container and properly dispose of the fuel.

• Close the bleed valve and remove the fuel hose.

• Locate and disconnect the water-in-fuel sensor electrical connector.

• Remove the fuel filter past rotating counter-clockwise (equally if you were looking from the bottom upwards). Exist sure that the water-in-fuel sensor wire does non become entangled while unscrewing the filter. Keep the filter positioned upright until removed from vehicle to ensure fuel is not spilled.

• Drain the filter once removed and verify that the gasket did not stick to the fuel filter housing flange.

• Remove the water-in-fuel sensor assembly from the bottom of the fuel filter using an advisable wrench, socket, or pliers.

• Replace the o-band on the water-in-fuel sensor assembly (provided with new fuel filter). If the water-in-fuel sensor assembly is damaged, do non reuse.

• Lubricate the water-in-fuel sensor o-band with clean engine oil, and then install snug onto the new fuel filter; do not overtighten.

• Lubricate the new fuel filter gasket with clean engine oil, and so install at the top of the fuel filter assembly.

• Do not fill the filter with diesel fuel; the fuel filter housing has an integrated hand pump that will be used to pump diesel from the fuel tank into the filter.

• Install the replacement fuel filter, one time once again ensuring that the h2o-in-fuel sensor connector does not become entangled with its surroundings. Install snug by hand only, do not tighten with tools.

• Locate and open the bleed valve towards the commuter side of the fuel priming pump. If desired, y'all can remove the bleed screw for inspection of the o-ring.

• Repeatedly pump the plunger on the top of the fuel filter housing until all air escapes and diesel begins to menses out of the bleed screw orifice. Immediately close the bleed spiral; practise non overtighten, the spiral is plastic. Clean upwardly any spills so that leaks can be easily detected.

• Reinstall the inner fender and intake tube.

• Start the engine and check for leaks. If truck runs rough for an extended menstruation of time (idle should smooth out within 30 seconds), turn engine off, re-drain system at the fuel filter housing, and check for leaks (including the bleed screw o-ring).

Last update: 12/6/2021

Disclaimer(due south): Vehicle diagnostic and repair procedures may place participants in a state of affairs that poses severe chance of injury; always adhere to proper safe guidelines, ensure any applicable safeguards are in place, and wear appropriate PPE when working on or effectually a vehicle.

Source(s): Part numbers retrieved from the ACDelco parts catalog (www.acdelco.com)