Pacific Performance Engineering transmission cooler 2006–2010 Chevy/GMC Duramax (LB7/LLY/LBZ/LMM) direct-fit

PPE Performance transmission cooler 124062000 is a direct-fit aftermarket cooler engineered for 2006–2010 Chevy and GMC diesel models with LB7, LLY, LBZ and LMM engines to manage transmission temperatures reliably.

This transmission cooler from Pacific Performance Engineering is built to match the fitment needs of specific Chevy and GMC trucks from model years 2006 through 2010. It’s manufactured in the United States and packaged to arrive ready for installation; check your vehicle’s engine and model designation to confirm compatibility before ordering. The unit combines rugged construction with a compact footprint so it fits factory mounting points while improving cooling capacity compared with many stock coolers.

What makes this transmission cooler suitable for LB7/LLY and LBZ/LMM diesel trucks?

The cooler is designed around the vehicle-specific routing and mounting used on these GM Duramax-powered trucks, which helps ensure a straightforward replacement or upgrade. Materials and core design are selected to tolerate frequent towing, heavy loads, and prolonged idling common in diesel work trucks.

• Direct-fit dimensions matched to 2006–2010 Chevy/GMC transmissions
• Durable construction for towing and fleet duty
• Manufactured in the United States for quality control

How simple is installation and what should I prepare?

Installation is intended to be user-friendly when replacing a compatible cooler: many buyers report straightforward swapping into factory locations using existing hoses and brackets. Still, confirm mounting clearances and hose end types before starting, and have a drain/collection pan to catch transmission fluid during the changeover.

• Fits factory mounting points on compatible GM trucks
• May reuse existing transmission lines depending on hose fittings
• Expect basic hand tools and a fluid drain container for installation

What are the physical specs and packaging details?

The cooler ships in a compact, well-protected package with measurements and weight listed to help plan shipping and storage. The product dimensions and weight reflect a design that balances cooling surface area with a profile narrow enough for tight engine bays and front-mounted locations.

• Package dimensions: 63.5 x 14.986 x 24.384 centimetres
• Package weight: approximately 5.012 kilograms
• Country of origin: United States

Will this cooler improve towing or heavy-duty performance?

Upgrading to a higher-capacity or more efficient cooler can help maintain more consistent transmission temperatures under load, which supports transmission longevity and stable shifting behavior. Results depend on the vehicle’s existing cooling system, auxiliary coolers, and operating conditions, so use this cooler as part of a planned maintenance or upgrade strategy.

• Helps maintain transmission temperature under sustained loads
• Works well alongside additional cooling upgrades when needed
• Contributes to consistent shifting during towing or heavy use

Who is this for: This PPE Performance transmission cooler 124062000 is aimed at owners of 2006–2010 Chevy and GMC trucks with LB7, LLY, LBZ or LMM Duramax engines who need a reliable, vehicle-specific replacement or an upgrade for demanding driving conditions. It’s a practical choice for fleet managers, frequent tow vehicle operators, and DIY mechanics who want a U.S.-made component that fits factory locations and supports heavier duty use without complex modifications. Always verify exact engine and model fitment before purchase to ensure correct compatibility.