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PPEI Tuning

4.5 (123)

2004.5 - 2005 GM 6.6L LLY Duramax | Allison Transmission Tuning by PPEI

Name: PPEI Tuning 2004.5 - 2005 GM 6.6L LLY Duramax | Allison Transmission Tuning by PPEI - 2004.5 - 2005 GM 6.6L LLY Duramax | Allison Transmission Tuning by PPEI
Brand: PPEI Tuning
SKU: 42150975897757
Price: 316.24 USD
Availability: InStock
Rating: 4.7143 (6 reviews)

4.5 (1,234)

Sold 100+ last 30 days

20% off first order

$316.24

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Color

Black

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Description

Enhance your driving experience and extend the lifespan of your Allison transmission with PPEI’s Transmission Tuning, specifically designed for the 2004.5 - 2005 LLY Duramax. PPEI’s 5-Speed Allison transmission tuning is a game-changer for ...

Reviews

4.7

7 ratings

Best tunes in the business

When I originally tuned my truck i went with a different company. The truck never ran good, had 0 boost in 5th gear and downshifted a bunch. So I ordered Ppei tunes and trans reprogram and with the help of Ryan got them loaded onto the truck. Truck runs 100% better and pulls like it should now. Thanks a million guys.

Steven · June 11, 2025