Alliant Power DT660019 is a new DTech fuel injector installation kit for the GM Duramax 6.6L LB7. It holds two external o-rings and one nozzle washer for one injector, and DTech lists eight kits per engine. DTech lists it for 2001 to 2004.5 LB7 pickups and 2003 to 2004.5 C4500 and C5500 medium duty trucks with the LB7.

Alliant’s application list includes the Chevrolet Silverado 2500 HD and 3500 and GMC Sierra 2500 HD and 3500 (2001 to 2004) and the GMC C4500 and C5500 Topkick (2003 to 2004). For 2004.5 to 2010 LLY, LBZ and LMM pickups, DTech lists a different kit, DT660024.

Specifications

Fits / Applications

• GM Duramax 6.6L LB7 pickups, 2001 to 2004.5
• C4500 and C5500 medium duty trucks with the LB7, 2003 to 2004.5
• Chevrolet Silverado 2500 HD (2001-2004)
• Chevrolet Silverado 3500 (2001-2004)
• GMC Sierra 2500 HD (2001-2004)
• GMC Sierra 3500 (2001-2004)
• GMC C4500 Topkick (2003-2004)
• GMC C5500 Topkick (2003-2004)

Part Numbers & Cross Reference

Reference number listed by DTech RTF26400

In the Box

• 2 external o-rings
• 1 nozzle washer

Frequently Asked Questions

How many injectors does one DT660019 kit cover?

One. The kit holds two external o-rings and one nozzle washer, and DTech lists eight kits per engine.

Does DT660019 fit the 2004.5 and later LLY?

DTech lists DT660019 for the LB7 only and lists kit DT660024 for 2004.5 to 2010 LLY, LBZ and LMM pickups. DTech’s catalog notes that LB7 trucks have a 1 as the eighth VIN character and LLY trucks a 2.

Is DT660019 part of a larger kit?

Yes. DTech’s DT660021 holds four DT660019 kits and one DT660020 return line kit. DT660022 adds a valve rocker arm cover gasket, and DT660026 adds the gasket plus grommets and injection line oil seals.

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