PPE 128051420 Heavy Duty Cast Deep Transmission Pan for 10L1000 Transmission | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax L5P

Features:

• Fits 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax.
• Increases transmission fluid capacity by 1 gallon.
• Lowers transmission fluid temperatures for longer life.
• Cast aluminum fins improve cooling efficiency.
• Internal heat sinks reduce fluid slosh and heat.
• Reinforced flange gussets add strength and durability.
• Includes stainless drain plug with Neodymium magnet.
• Magnetic check port plug captures harmful metal debris.
• Viton O-ring seals resist leaks under high heat.
• Heavy-duty cast aluminum construction for long service life.
• Helps protect expensive transmission internals from wear.

Keep Your Allison Running Cooler And Stronger

When you put your truck to work, heat is the enemy that quietly wears down your transmission. The PPE Heavy Duty Cast Deep Transmission Pan is designed to fight back by adding a full extra gallon of fluid capacity, which lowers operating temperatures and extends fluid life. It is built from rugged cast aluminum, giving you a serious upgrade in both strength and cooling compared to the thin factory pan. The fins on the outside of the pan catch underbody airflow to help shed heat while the internal heat sinks keep fluid stable even when you are hauling heavy or climbing steep grades. PPE also thought ahead by adding powerful magnetic drain and check plugs that pull harmful metal shavings out of the oil before they can circulate through your transmission. That means better protection for the 10L1000 inside your Duramax-powered Silverado or Sierra. If you want your Allison to keep its reputation for reliability while working harder and lasting longer, this is one upgrade you will not regret.

Built To Protect The 10L1000 From The Inside Out

The PPE Heavy Duty Cast Deep Transmission Pan for 2020-2025 GM Silverado and Sierra 2500HD and 3500HD models with the 6.6L Duramax is engineered with both durability and heat control in mind. Constructed from A356.0-T6 cast aluminum, it offers far greater strength and heat dissipation than a stock stamped steel pan. The design incorporates .75-inch external fins that take advantage of underbody airflow, while internal heat sinks reduce fluid sloshing and help stabilize temperatures under load. With the added gallon of capacity, the transmission fluid not only runs cooler but also maintains its protective qualities longer. PPE includes a stainless steel magnetic drain plug and a magnetic check port plug, both equipped with Viton O-ring seals to prevent leaks and capture metal particles before they can damage internal components. Reinforced flange gussets provide additional structural support, making the pan resilient against flex and vibration. Backed by a limited lifetime warranty, this transmission pan is a complete upgrade that enhances both performance and longevity of the Allison 10L1000.

Fits: 2020, 2021, 2022, 2023, 2024, 2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax L5P

Notes:

• Fits 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax with Allison 10L1000 transmission.
• Adds about 1 gallon of extra fluid capacity.
• Lower fluid temps help extend transmission life.
• Cast aluminum design is stronger than stamped steel.
• External fins and internal heat sinks improve cooling.
• Magnetic drain and check plugs capture metal debris.
• Uses Viton O-ring seals to resist heat and leaks.
• Compatible with OEM transmission gasket for easy install.
• Reinforced gussets prevent flange flex and warping.
• Optional port allows installation of a temp sensor.
• Covered by PPE’s limited lifetime warranty.