Cooling System Refresh Kit For 2011-2016 LML Chevrolet/GMC 2500HD 3500HD 6.6L Duramax | SPELAB
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---tab Description---
2011–2016 LML 6.6L Duramax Cooling System Refresh Kit
Refresh Your Cooling System. Built for the Duramax.
Your 2011–2016 GM 6.6L LML Duramax was built to work hard.
Years of towing, hauling, high engine-bay temperatures, vibration, and repeated heat cycles can take a toll on aging cooling-system components. When one component starts to show its age, other factory components may not be far behind.
Instead of replacing cooling components one at a time, the SPELAB Cooling System Refresh Kit combines three key cooling-system components into one complete package:
Upper Coolant Tube + Aluminum Radiator + Coolant Reservoir Tank
Designed specifically for LML 6.6L Duramax-powered Chevrolet Silverado and GMC Sierra HD trucks, this kit provides a practical way to refresh aging cooling components and build a more durable foundation for daily driving, towing, hauling, and heavy-duty use.
WHY REFRESH YOUR LML DURAMAX COOLING SYSTEM?
YEARS OF HEAT, PRESSURE & VIBRATION TAKE THEIR TOLL
The cooling system operates every time your Duramax is running.
Repeated heat cycles, coolant pressure, engine vibration, towing loads, and years of service can accelerate wear on factory cooling components.
For an older LML Duramax, refreshing multiple aging components together can be a smarter preventative-maintenance strategy than waiting for each individual part to fail.
ONE KIT. THREE KEY COMPONENTS.
The SPELAB Cooling System Refresh Kit brings together:
01. UPPER COOLANT TUBE
Refresh the factory coolant-routing system with a durable replacement designed to withstand the heat and vibration found in the LML Duramax engine bay.
02. ALUMINUM RADIATOR
The radiator is the primary heat exchanger for the engine cooling system. A refreshed radiator provides a solid foundation for maintaining efficient coolant heat transfer during everyday and heavy-duty operation.
03. COOLANT RESERVOIR TANK
Replace an aging factory reservoir with a durable replacement designed for continuous exposure to engine-bay heat and coolant-system pressure.
Together, these components provide a more comprehensive cooling-system refresh than replacing a single component alone.
BUILT FOR THE LML 6.6L DURAMAX
UPGRADE THE COMPONENTS THAT MATTER
The LML Duramax is designed for demanding work, and its cooling system plays a critical role in keeping engine temperatures under control.
Instead of replacing only the component that has already failed, the SPELAB Cooling System Refresh Kit allows you to address multiple key cooling components at the same time.
UPPER COOLANT TUBE
Designed as a replacement for the factory coolant tube, helping refresh a critical coolant-routing component exposed to heat, pressure, vibration, and repeated thermal cycling.
ALUMINUM RADIATOR
The radiator transfers heat from the engine coolant to the surrounding air.
A properly functioning radiator is essential for maintaining stable coolant temperatures, especially when your Duramax is towing or hauling under load.
COOLANT RESERVOIR TANK
The coolant reservoir accommodates coolant expansion and contraction as the engine temperature changes.
Replacing an aging reservoir helps refresh another critical component of the cooling system and provides added confidence for long-term use.
Component
What It Does
Why Upgrade
Upper Coolant Tube
Transfers coolant from engine/thermostat housing to radiator
Replace aging OEM plastic/rubber components
Radiator
Dissipates engine coolant heat
Restore/upgrade core cooling capacity
Coolant Reservoir Tank
Manages coolant expansion and system pressure
Replace aging plastic reservoir
Complete Kit
Refreshes multiple cooling-system components
Less piecemeal replacement, more complete system refresh
WHAT'S INCLUDED
SPELAB 2011–2016 LML 6.6L Duramax Cooling System Refresh Kit includes:
• 1 × Upper Coolant Tube
• 1 × Aluminum Radiator
• 1 × Coolant Reservoir Tank
• Installation hardware / accessories as applicable to each component
Please
Note:
Exact fittings, clamps, brackets, and installation hardware may vary depending on the specific kit configuration. Please verify the product configuration before ordering.
---tab Fiment---
2011–2016 Chevrolet Silverado 2500HD 6.6L LML Duramax Turbo Diesel
2011–2016 Chevrolet Silverado 3500HD 6.6L LML Duramax Turbo Diesel
2011–2016 GMC Sierra 2500HD 6.6L LML Duramax Turbo Diesel
2011–2016 GMC Sierra 3500HD 6.6L LML Duramax Turbo Diesel
ENGINE
6.6L LML Duramax Turbo Diesel
FITMENT NOTE
Please verify your:
Year → Make → Model → Engine → Cooling System Configuration
before ordering.
Cooling-system configurations may vary by model, production year, drivetrain, transmission, radiator configuration, and previous modifications.
If your truck has aftermarket cooling-system components, compare the original parts, connection points, dimensions, and product specifications before purchase.
---tab Blog & Video---
Installation and Product Videos
Reduce engine operating temperature through modifications (by approximately 20–25°F ≈ 11–14°C)!
Performance Upgrade Installation Guide
Quickly upgrade your cooling system
Performance Upgrade Installation Guide
OE = Weakness → Aluminum Coolant Tube = Improved reliability + Prevention of major failures
Failure Prevention Installation Guide
×
---tab FAQ---
FAQ
Q: What does the SPELAB Cooling System Refresh Kit include?
The kit includes three major cooling-system components:
1 × Upper Coolant Tube
1 × Aluminum Radiator
1 × Coolant Reservoir Tank
Q: What vehicles does this kit fit?
This kit is designed for applicable 2011–2016 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD equipped with the 6.6L LML Duramax Turbo Diesel.
Always verify your specific vehicle configuration before ordering.
Q: Why replace three cooling components together?
The radiator, upper coolant tube, and coolant reservoir work together as part of the vehicle's cooling system.
On an older truck, replacing only one failed component may leave other aging components in service.
A complete refresh allows you to address several key cooling components at the same time.
Q: Is this a performance cooling upgrade?
The kit is primarily designed as a cooling-system refresh and durability upgrade .
Its purpose is to replace aging factory components with upgraded replacement components and provide a more durable foundation for the cooling system.
It should not be considered a guaranteed horsepower increase or specific coolant-temperature reduction unless supported by verified testing.
Q: Is professional installation recommended?
Yes.
Installation difficulty can vary depending on vehicle configuration and mechanical experience. Professional installation is recommended, especially when replacing the radiator and servicing multiple cooling-system components.
Q: Do I need to replace my coolant after installation?
Yes.
When replacing the radiator or other major cooling-system components, coolant will need to be drained and the system properly refilled and bled.
Follow the appropriate service procedure for your vehicle.
Q: Can I use this kit on a modified LML Duramax?
The kit may be suitable as a supporting upgrade for modified trucks, but compatibility should be verified based on your specific vehicle configuration and other aftermarket cooling components.
Always check dimensions, connection points, clearance, and compatibility before installation.
Q: How do I make sure I order the correct kit?
Before ordering, verify:
Year → Make → Model → Engine → Cooling/Radiator Configuration
For example:
2015 → Chevrolet → Silverado 2500HD → 6.6L LML Duramax
If your truck has aftermarket components or previous cooling-system modifications, compare the original components with the SPELAB product specifications before purchasing.
---tab Description---
2011–2016 LML 6.6L Duramax Cooling System Refresh Kit
Refresh Your Cooling System. Built for the Duramax.
Your 2011–2016 GM 6.6L LML Duramax was built to work hard.
Years of towing, hauling, high engine-bay temperatures, vibration, and repeated heat cycles can take a toll on aging cooling-system components. When one component starts to show its age, other factory components may not be far behind.
Instead of replacing cooling components one at a time, the SPELAB Cooling System Refresh Kit combines three key cooling-system components into one complete package:
Upper Coolant Tube + Aluminum Radiator + Coolant Reservoir Tank
Designed specifically for LML 6.6L Duramax-powered Chevrolet Silverado and GMC Sierra HD trucks, this kit provides a practical way to refresh aging cooling components and build a more durable foundation for daily driving, towing, hauling, and heavy-duty use.
WHY REFRESH YOUR LML DURAMAX COOLING SYSTEM?
YEARS OF HEAT, PRESSURE & VIBRATION TAKE THEIR TOLL
The cooling system operates every time your Duramax is running.
Repeated heat cycles, coolant pressure, engine vibration, towing loads, and years of service can accelerate wear on factory cooling components.
For an older LML Duramax, refreshing multiple aging components together can be a smarter preventative-maintenance strategy than waiting for each individual part to fail.
ONE KIT. THREE KEY COMPONENTS.
The SPELAB Cooling System Refresh Kit brings together:
01. UPPER COOLANT TUBE
Refresh the factory coolant-routing system with a durable replacement designed to withstand the heat and vibration found in the LML Duramax engine bay.
02. ALUMINUM RADIATOR
The radiator is the primary heat exchanger for the engine cooling system. A refreshed radiator provides a solid foundation for maintaining efficient coolant heat transfer during everyday and heavy-duty operation.
03. COOLANT RESERVOIR TANK
Replace an aging factory reservoir with a durable replacement designed for continuous exposure to engine-bay heat and coolant-system pressure.
Together, these components provide a more comprehensive cooling-system refresh than replacing a single component alone.
BUILT FOR THE LML 6.6L DURAMAX
UPGRADE THE COMPONENTS THAT MATTER
The LML Duramax is designed for demanding work, and its cooling system plays a critical role in keeping engine temperatures under control.
Instead of replacing only the component that has already failed, the SPELAB Cooling System Refresh Kit allows you to address multiple key cooling components at the same time.
UPPER COOLANT TUBE
Designed as a replacement for the factory coolant tube, helping refresh a critical coolant-routing component exposed to heat, pressure, vibration, and repeated thermal cycling.
ALUMINUM RADIATOR
The radiator transfers heat from the engine coolant to the surrounding air.
A properly functioning radiator is essential for maintaining stable coolant temperatures, especially when your Duramax is towing or hauling under load.
COOLANT RESERVOIR TANK
The coolant reservoir accommodates coolant expansion and contraction as the engine temperature changes.
Replacing an aging reservoir helps refresh another critical component of the cooling system and provides added confidence for long-term use.
Component
What It Does
Why Upgrade
Upper Coolant Tube
Transfers coolant from engine/thermostat housing to radiator
Replace aging OEM plastic/rubber components
Radiator
Dissipates engine coolant heat
Restore/upgrade core cooling capacity
Coolant Reservoir Tank
Manages coolant expansion and system pressure
Replace aging plastic reservoir
Complete Kit
Refreshes multiple cooling-system components
Less piecemeal replacement, more complete system refresh
WHAT'S INCLUDED
SPELAB 2011–2016 LML 6.6L Duramax Cooling System Refresh Kit includes:
• 1 × Upper Coolant Tube
• 1 × Aluminum Radiator
• 1 × Coolant Reservoir Tank
• Installation hardware / accessories as applicable to each component
Please
Note:
Exact fittings, clamps, brackets, and installation hardware may vary depending on the specific kit configuration. Please verify the product configuration before ordering.
---tab Fiment---
2011–2016 Chevrolet Silverado 2500HD 6.6L LML Duramax Turbo Diesel
2011–2016 Chevrolet Silverado 3500HD 6.6L LML Duramax Turbo Diesel
2011–2016 GMC Sierra 2500HD 6.6L LML Duramax Turbo Diesel
2011–2016 GMC Sierra 3500HD 6.6L LML Duramax Turbo Diesel
ENGINE
6.6L LML Duramax Turbo Diesel
FITMENT NOTE
Please verify your:
Year → Make → Model → Engine → Cooling System Configuration
before ordering.
Cooling-system configurations may vary by model, production year, drivetrain, transmission, radiator configuration, and previous modifications.
If your truck has aftermarket cooling-system components, compare the original parts, connection points, dimensions, and product specifications before purchase.
---tab Blog & Video---
Installation and Product Videos
Reduce engine operating temperature through modifications (by approximately 20–25°F ≈ 11–14°C)!
Performance Upgrade Installation Guide
Quickly upgrade your cooling system
Performance Upgrade Installation Guide
OE = Weakness → Aluminum Coolant Tube = Improved reliability + Prevention of major failures
Failure Prevention Installation Guide
×
---tab FAQ---
FAQ
Q: What does the SPELAB Cooling System Refresh Kit include?
The kit includes three major cooling-system components:
1 × Upper Coolant Tube
1 × Aluminum Radiator
1 × Coolant Reservoir Tank
Q: What vehicles does this kit fit?
This kit is designed for applicable 2011–2016 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD equipped with the 6.6L LML Duramax Turbo Diesel.
Always verify your specific vehicle configuration before ordering.
Q: Why replace three cooling components together?
The radiator, upper coolant tube, and coolant reservoir work together as part of the vehicle's cooling system.
On an older truck, replacing only one failed component may leave other aging components in service.
A complete refresh allows you to address several key cooling components at the same time.
Q: Is this a performance cooling upgrade?
The kit is primarily designed as a cooling-system refresh and durability upgrade .
Its purpose is to replace aging factory components with upgraded replacement components and provide a more durable foundation for the cooling system.
It should not be considered a guaranteed horsepower increase or specific coolant-temperature reduction unless supported by verified testing.
Q: Is professional installation recommended?
Yes.
Installation difficulty can vary depending on vehicle configuration and mechanical experience. Professional installation is recommended, especially when replacing the radiator and servicing multiple cooling-system components.
Q: Do I need to replace my coolant after installation?
Yes.
When replacing the radiator or other major cooling-system components, coolant will need to be drained and the system properly refilled and bled.
Follow the appropriate service procedure for your vehicle.
Q: Can I use this kit on a modified LML Duramax?
The kit may be suitable as a supporting upgrade for modified trucks, but compatibility should be verified based on your specific vehicle configuration and other aftermarket cooling components.
Always check dimensions, connection points, clearance, and compatibility before installation.
Q: How do I make sure I order the correct kit?
Before ordering, verify:
Year → Make → Model → Engine → Cooling/Radiator Configuration
For example:
2015 → Chevrolet → Silverado 2500HD → 6.6L LML Duramax
If your truck has aftermarket components or previous cooling-system modifications, compare the original components with the SPELAB product specifications before purchasing.
SPELAB Auto Parts: 1 year from delivery; supplier conditions apply. SPELAB offers a one-year limited warranty from delivery for material/workmanship defects under normal use, original purchaser only, with proof of purchase. Consumables, wear/cosmetic damage, improper installation, alteration, misuse and removal/installation labor are excluded. Approved remedies are repair, replacement or replacement parts at SPELAB’s discretion.
Return and warranty information is based on what SPELAB Auto Parts offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
SPELAB Auto Parts warranty policyView complete warrantyProduct conditions
Return and warranty information is based on what SPELAB Auto Parts offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
- Return eligibility
- SPELAB allows return requests within 30 days of delivery, with authorization and undamaged goods, original packaging and accessories. Tuners are final sale. Customer pays voluntary return shipping; original shipping is not refunded. SPELAB pays return shipping for approved damaged, incorrect or manufacturing-defective items. Transit damage must be reported within two business days and incorrect items within seven days. Based on what SPELAB Auto Parts offers.
- Return window
- Not stated for this product; see supplier terms
- Restocking fee
- See supplier terms; no product-specific fee stated
- Return shipping
- Based on the supplier’s return policy; see terms
- Made to order
- No
- Backorder status
- Not backordered
- Cancellation
- Subject to supplier terms; contact FullSpecDiesel before requesting cancellation
- Warranty provider
- SPELAB Auto Parts
- Warranty duration
- 1 year from delivery; supplier conditions apply
- Compatibility
- Listed for specific vehicle configurations
- Legal use
- Street legal
- Processing estimate
- 3–10 business days supplier processing
- Shipping
- Shipping calculated at checkout
- Signature
- No signature requirement
- Supplier
- SPELAB Auto Parts
Product compatibility is based on the vehicle and product information provided. Review your selected truck, product options, measurements, modifications, and installation requirements before ordering.