HSP Diesel Upper Coolant Tube for 2011-2014 Chevrolet and GMC LML Duramax
This product is vehicle-specific. Select your year, make, model, engine and transmission to confirm compatibility before adding it to your cart.
Colours and prices as published by HSP Diesel · verified 9/8/2026
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- Ships from HSP Diesel
2011-2014 Chevrolet / GMC Upper Coolant Tube Part Number: 537-1-HSP The HSP Upper Coolant Tube is a premium upgrade for 2011-2014 LML Duramax-equipped Chevrolet and GMC trucks. This often-overlooked component improves durability and brings a cleaner, more custom look to your engine bay. Why Upgrade the Upper Coolant Tube? The OEM upper coolant tube is made of rubber — a material that can crack over time, especially under high heat and pressure. This leads to cooling system failure and a cluttered engine bay appearance. The HSP Upper Coolant Tube resolves both of those issues in one upgrade. What Sets the HSP Tube Apart? Crafted from aluminum, the HSP Upper Coolant Tube offers superior strength, eliminates rubber cracking risks, and delivers better aesthetics. Designed with gentle bends to match factory routing, this powder-coated tube includes the signature HSP Diesel logo front and center. It's a direct-fit replacement with upgraded components that improve both flow and reliability. Whats
Included:
1x LML (11-14) Radiator Hose Tube w/Logo (HSP-IN-239-1) 1x 1 3/4" Worm Gear Clamp (RFB-408-RFAB) 1x 1.75" 90degree Boot - Rubber (RFB-433-RFAB) 1x 1.75"x3" Straight Boot - Rubber (RFB-437-RFAB)
Fitment:
LML: 2011-2014 (VIN Code 8) How to Check VIN Code: The 8th character of the VIN indicates engine code. The 10th character shows the model year. Overview Aluminum construction for increased durability Includes high-strength silicone boots Eliminates risk of cracking rubber hoses Powder coat options available Drop-in fit with factory components
Note:
HSP is currently transitioning boot styles. Some units may ship with unbranded boots to maintain part availability and quality standards. Our Warranty HSP "NO BS" LIMITED LIFETIME WARRANTY At HSP, we believe in our products and stand behind every one that leaves our facility. For years, we've supported customers without a formal policy — now, with our official No BS Warranty, you can count on reliable, long-term coverage. This is our promise to go above and beyond, with straightforward support and no runaround. Click here to read the full HSP Warranty
2011-2014 Chevrolet / GMC Upper Coolant Tube Part Number: 537-1-HSP The HSP Upper Coolant Tube is a premium upgrade for 2011-2014 LML Duramax-equipped Chevrolet and GMC trucks. This often-overlooked component improves durability and brings a cleaner, more custom look to your engine bay. Why Upgrade the Upper Coolant Tube? The OEM upper coolant tube is made of rubber — a material that can crack over time, especially under high heat and pressure. This leads to cooling system failure and a cluttered engine bay appearance. The HSP Upper Coolant Tube resolves both of those issues in one upgrade. What Sets the HSP Tube Apart? Crafted from aluminum, the HSP Upper Coolant Tube offers superior strength, eliminates rubber cracking risks, and delivers better aesthetics. Designed with gentle bends to match factory routing, this powder-coated tube includes the signature HSP Diesel logo front and center. It's a direct-fit replacement with upgraded components that improve both flow and reliability. Whats
Included:
1x LML (11-14) Radiator Hose Tube w/Logo (HSP-IN-239-1) 1x 1 3/4" Worm Gear Clamp (RFB-408-RFAB) 1x 1.75" 90degree Boot - Rubber (RFB-433-RFAB) 1x 1.75"x3" Straight Boot - Rubber (RFB-437-RFAB)
Fitment:
LML: 2011-2014 (VIN Code 8) How to Check VIN Code: The 8th character of the VIN indicates engine code. The 10th character shows the model year. Overview Aluminum construction for increased durability Includes high-strength silicone boots Eliminates risk of cracking rubber hoses Powder coat options available Drop-in fit with factory components
Note:
HSP is currently transitioning boot styles. Some units may ship with unbranded boots to maintain part availability and quality standards. Our Warranty HSP "NO BS" LIMITED LIFETIME WARRANTY At HSP, we believe in our products and stand behind every one that leaves our facility. For years, we've supported customers without a formal policy — now, with our official No BS Warranty, you can count on reliable, long-term coverage. This is our promise to go above and beyond, with straightforward support and no runaround. Click here to read the full HSP Warranty
HSP offers a limited lifetime warranty to the original purchaser on eligible HSP products. Underhood powder coating has separate two-year limited coverage. Non-HSP brands follow their own manufacturer warranties. Discontinued products and customer/installer damage are excluded. Claim authorization is required; customer pays inbound shipping for ordinary claims.
Return and warranty information is based on what HSP Diesel offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
HSP Diesel warranty policyView complete warrantyProduct conditions
Return and warranty information is based on what HSP Diesel offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
- Return eligibility
- HSP states returns must be postmarked within 30 days of purchase, new and unused with original tags and packaging, with an approved RMA. A 15% restocking fee and customer-paid return shipping apply. Special orders, non-HSP dropship products, apparel, used items and custom colors are excluded. Based on what HSP Diesel 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
- HSP Diesel
- Warranty duration
- Product-specific duration not stated; see supplier terms
- 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
- HSP Diesel
Product compatibility is based on the vehicle and product information provided. Review your selected truck, product options, measurements, modifications, and installation requirements before ordering.