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Thumbnail Filmstrip of LML Duramax Rear EGR Cooler Bullet Proof Diesel 6700014 Images
The H-CORE Line of EGR Coolers from Bullet Proof Diesel
Tags: egr cooler,egr,egr system,navistar,international,cummins,duramax,peterbuilt,mack,school bus,class 6,class 7,class 5,truck,fleet,upgrade,replacement,h-core
Bullet Proof Diesel Rear EGR Cooler for 2013–2016 LML Duramax (6700014)
Upgrade the most failure-prone component on your 2013–2016 Chevy Silverado or GMC Sierra 2500HD/3500HD 6.6L Duramax LML with the Bullet Proof Diesel Rear EGR Cooler. This direct-fit replacement (GM #12645820) uses patented H-Core technology to deliver far greater reliability than the factory cooler.
LML EGR coolers operate under extreme thermal cycling and high EGR flow. Factory units frequently crack from heat stress, leaking coolant into the exhaust or intake. That can cause unexplained coolant loss, white smoke, or serious engine damage. Bullet Proof Diesel’s design specifically addresses those weaknesses.
Key Features
- Patented Helical H-Core Technology — Twisted (helically wound) stainless steel tubes flex and move with temperature changes. This dramatically reduces stress on bulkheads and weld seams compared with rigid straight-tube designs. The tighter tube packing also increases surface area for more effective cooling of EGR gases.
- Stainless steel construction — Stronger and more resistant to fatigue and heat-stress failure than OEM coolers. Tubes and bulkheads are TIG-welded or vacuum-brazed.
- Direct-fit replacement — Quality-controlled for a precise drop-in install with no modifications required.
- CARB compliant — Executive Order D-730-6; legal for use in California and all 50 states.
- Lifetime parts-only warranty — Purchase with confidence.
Fitment
- 2013–2016 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD with 6.6L Duramax LML
- 8th VIN digit = 8
- Replaces GM 12645820 (rear cooler)
Important note for 2013–2014 models: Confirm that your existing cooler matches the pictured unit. Some early LML rear coolers use a different configuration (see part 6700013).
Installation Notes
Gaskets and hardware are not included.
This is a street-legal reliability upgrade that keeps your emissions system intact while solving the LML’s well-known EGR cooler weakness. Thousands of Duramax owners trust Bullet Proof Diesel for this exact reason.
Bullet Proof Diesel Rear EGR Cooler for 2013–2016 LML Duramax (6700014)
Upgrade the most failure-prone component on your 2013–2016 Chevy Silverado or GMC Sierra 2500HD/3500HD 6.6L Duramax LML with the Bullet Proof Diesel Rear EGR Cooler. This direct-fit replacement (GM #12645820) uses patented H-Core technology to deliver far greater reliability than the factory cooler.
LML EGR coolers operate under extreme thermal cycling and high EGR flow. Factory units frequently crack from heat stress, leaking coolant into the exhaust or intake. That can cause unexplained coolant loss, white smoke, or serious engine damage. Bullet Proof Diesel’s design specifically addresses those weaknesses.
Key Features
Patented Helical H-Core Technology — Twisted (helically wound) stainless steel tubes flex and move with temperature changes. This dramatically reduces stress on bulkheads and weld seams compared with rigid straight-tube designs. The tighter tube packing also increases surface area for more effective cooling of EGR gases.
Stainless steel construction — Stronger and more resistant to fatigue and heat-stress failure than OEM coolers. Tubes an[...]
Bullet Proof Diesel Rear EGR Cooler for 2013–2016 LML Duramax (6700014)
Upgrade the most failure-prone component on your 2013–2016 Chevy Silverado or GMC Sierra 2500HD/3500HD 6.6L Duramax LML with the Bullet Proof Diesel Rear EGR Cooler. This direct-fit replacement (GM #12645820) uses patented H-Core technology to deliver far greater reliability than the factory cooler.
LML EGR coolers operate under extreme thermal cycling and high EGR flow. Factory units frequently crack from heat stress, leaking coolant into the exhaust or intake. That can cause unexplained coolant loss, white smoke, or serious engine damage. Bullet Proof Diesel’s design specifically addresses those weaknesses.
Key Features
- Patented Helical H-Core Technology — Twisted (helically wound) stainless steel tubes flex and move with temperature changes. This dramatically reduces stress on bulkheads and weld seams compared with rigid straight-tube designs. The tighter tube packing also increases surface area for more effective cooling of EGR gases.
- Stainless steel construction — Stronger and more resistant to fatigue and heat-stress failure than OEM coolers. Tubes and bulkheads are TIG-welded or vacuum-brazed.
- Direct-fit replacement — Quality-controlled for a precise drop-in install with no modifications required.
- CARB compliant — Executive Order D-730-6; legal for use in California and all 50 states.
- Lifetime parts-only warranty — Purchase with confidence.
Fitment
- 2013–2016 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD with 6.6L Duramax LML
- 8th VIN digit = 8
- Replaces GM 12645820 (rear cooler)
Important note for 2013–2014 models: Confirm that your existing cooler matches the pictured unit. Some early LML rear coolers use a different configuration (see part 6700013).
Installation Notes
Gaskets and hardware are not included.
This is a street-legal reliability upgrade that keeps your emissions system intact while solving the LML’s well-known EGR cooler weakness. Thousands of Duramax owners trust Bullet Proof Diesel for this exact reason.
Fits: LML|LGH Duramax 2011-2016
Fits: LML/LGH Duramax 2011-2014