Alliant Power DTech DT660026 is a new injector, return line and valve cover super kit for the GM 6.6L Duramax LB7. The maker lists it for 2001 to 2004 Chevrolet and GMC pickups and 2003 to 2004 Chevrolet Kodiak and GMC TopKick C4500 and C5500 trucks with the LB7.

It has everything in DT660022 (four DT660019 injector installation kits, one DT660020 return line kit and one lower rocker arm cover gasket) plus twelve noise isolator grommets and four injection line oil seals. One kit covers one bank of four injectors, so a full engine takes two kits.

Specifications

Fits / Applications

• Chevrolet and GMC pickups with the 6.6L Duramax LB7, 2001 to 2004
• Chevrolet Kodiak and GMC TopKick C4500 and C5500 with the 6.6L Duramax LB7, 2003 to 2004

In the Box

• Four DT660019 injector installation kits, each with two external o-rings and one nozzle washer
• One DT660020 fuel return line kit: four banjo washers and one return line connection banjo washer
• One lower rocker arm cover gasket (DT660018)
• Twelve noise isolator grommets for the lower valve cover (DT660014)
• Four valve cover injection line oil seals (DT660015)

Frequently Asked Questions

How many DT660026 kits for all eight injectors?

Two. One kit covers one bank of four injectors.

How is DT660026 different from DT660022?

DT660022 has the injector kits, return line washers and rocker arm cover gasket. DT660026 has all of that plus twelve noise isolator grommets and four injection line oil seals.

Does DT660026 fit a 2004.5 or later Duramax?

No. The maker lists it for the LB7 only. 2004 trucks came with the LB7 or the LLY. GM’s VIN engine code is 1 for the LB7 and 2 for the LLY.

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