Valve Body & Pump Kit with Enhanced Oil Flow

Features:

• Increases line pressure by up to 60psi
• Improves clutch pack clamping force
• Boosts cooler charge pressure by 250%
• Enhanced torque converter lockup control
• Shortens shift times under load
• Reduces clutch degradation during shifts
• Raises lube pressure from 6psi to 20psi
• Optimized for towing and high horsepower use
• Improves transmission cooling and oil flow
• Decreases regulator valve actuation pressure by 33%
• Built-in pressure bypass prevents over-compression
• Designed for 2020-2026 L5P 10L1000 transmissions

Built To Make The 10L1000 Work As Hard As You Do

If you push your L5P truck beyond light commuting, you already know the 10L1000 transmission can use some help when the loads get serious and the days get long. The SunCoast SC-10L1000-PVB Valve Body and Pump Kit is designed to turn that weak link into a real asset. From heavy towing to aggressive street driving, this setup delivers firmer shifts, stronger clutch holding power, and better overall control without sacrificing drivability! SunCoast takes a thoughtful approach here, improving oil flow and pressure in the areas that matter most instead of simply cranking up line pressure and hoping for the best. The result is a transmission that feels more confident under throttle and far more stable when torque demand spikes. Lockup happens quicker and cleaner, reducing unnecessary slip that can quietly kill the converter clutch over time. If your 2020-2026 Silverado or Sierra 2500HD or 3500HD sees real work or real power, this upgrade gives your transmission the backup it deserves.

Precision Oil Control Designed For High Demand Conditions

The SunCoast Pro Loc Valve Body and Pump Kit for the 10L1000 transmission is engineered to address known stress points when power levels and load demands increase. Overall line pressure is increased by as much as 60 psi, improving clutch pack clamping force while a built-in bypass prevents excessive pressure above 420 psi. The torque converter lockup circuit is modified to reduce the time from initial apply to zero turbine slip, which significantly improves clutch longevity. Lube circuit pressure is raised from a factory 6 psi to 20 psi, increasing oil flow to clutches, planets, and bushings to reduce heat buildup. SunCoast also recalibrates the regulator valve circuit, lowering the pressure required for full clutch engagement from 120 psi to 80 psi. This change shortens shift times and reduces frictional heat in critical clutch packs, especially the F clutch. Combined with increased cooler charge pressure and improved oil routing, this valve body and pump kit delivers the durability needed for towing, racing, or high horsepower L5P applications.

Fitment: 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax L5P

Notes:

• Designed for 2020-2026 GM Silverado and Sierra 2500HD/3500HD with 6.6L Duramax L5P
• Built specifically for the 10L1000 automatic transmission
• Addresses common weak points in high load and high horsepower conditions
• Improves torque converter clutch (TCC) engagement and reliability
• Raises lube circuit pressure from 6 psi to 20 psi
• Increases overall line pressure by up to 60 psi
• Reduces clutch regulator valve engagement pressure from 120 psi to 80 psi
• Shortens shift times and reduces clutch wear
• 250% increase in cooler charge pressure for better transmission cooling
• Recommended for towing, street performance, and racing applications
• Not a simple pressure bump, multi-faceted internal oil circuit upgrades included
• Built-to-order product with up to 15 business day lead time
• Recommended for trucks making 800+ HP with proper TCC tuning
• Includes built-in bypass to manage excessive pressure above 420 psi
• Prop 65 warning label