HSP Diesel Upper Coolant Tube for 2015-2016 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
2015-2016 Chevrolet / GMC Upper Coolant Tube Part Number: 537-2-HSP The HSP Upper Coolant Tube is a premium upgrade for the 2015-2016 LML Duramax-equipped Chevrolet and GMC trucks. This often-overlooked component is both functional and aesthetic — a simple replacement that adds durability and style to your engine bay. Why Upgrade to the HSP Upper Coolant Tube? The factory rubber upper coolant hose is prone to cracking, leaking, and early failure — especially in high-heat conditions. It's also an eyesore that clashes with an otherwise clean engine bay. The HSP Upper Coolant Tube eliminates those weak points while giving your truck a sharp, finished look. What Makes the HSP Upper Coolant Tube Different? HSPs version is crafted from durable aluminum to eliminate the cracking issues found in OEM rubber hoses. Designed with gentle mandrel bends and finished in your choice of powder coat colors, this drop-in replacement maintains factory fitment while improving reliability and appearance. The engraved HSP Diesel logo adds a bold detail front-and-center in the engine bay. Whats
Included:
1x LML (15-16) Radiator Hose Tube w/Logo (HSP-IN-239-2) 4x 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: 2015-2016 (VIN Code 8) Important Fitment
Note:
This only fits 2015-2016 model year LML trucks. While VIN codes may appear the same across years, there are engine bay differences. Double-check your vehicles year before purchasing. How to Check VIN Code: The 8th character of the VIN number indicates engine code. The 10th character shows the model year. Overview Aluminum construction for increased reliability High-strength silicone boots included Eliminates rubber cracking issues Powder coat options available Drop-in replacement with factory fitment
Note:
HSP is currently making a running change to boot styles. You may receive boots without logos — this ensures continued delivery of the high-quality parts you expect. Our Warranty HSP "NO BS" LIMITED LIFETIME WARRANTY At HSP, we believe in our products and stand firmly behind everything we make. For years, we've gone above and beyond to support our customers — even without a formal warranty. Now, with the No BS Warranty, we've made our commitment official. You can trust that you're covered with a lifetime guarantee that actually means something. Click here to read the HSP Warranty
2015-2016 Chevrolet / GMC Upper Coolant Tube Part Number: 537-2-HSP The HSP Upper Coolant Tube is a premium upgrade for the 2015-2016 LML Duramax-equipped Chevrolet and GMC trucks. This often-overlooked component is both functional and aesthetic — a simple replacement that adds durability and style to your engine bay. Why Upgrade to the HSP Upper Coolant Tube? The factory rubber upper coolant hose is prone to cracking, leaking, and early failure — especially in high-heat conditions. It's also an eyesore that clashes with an otherwise clean engine bay. The HSP Upper Coolant Tube eliminates those weak points while giving your truck a sharp, finished look. What Makes the HSP Upper Coolant Tube Different? HSPs version is crafted from durable aluminum to eliminate the cracking issues found in OEM rubber hoses. Designed with gentle mandrel bends and finished in your choice of powder coat colors, this drop-in replacement maintains factory fitment while improving reliability and appearance. The engraved HSP Diesel logo adds a bold detail front-and-center in the engine bay. Whats
Included:
1x LML (15-16) Radiator Hose Tube w/Logo (HSP-IN-239-2) 4x 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: 2015-2016 (VIN Code 8) Important Fitment
Note:
This only fits 2015-2016 model year LML trucks. While VIN codes may appear the same across years, there are engine bay differences. Double-check your vehicles year before purchasing. How to Check VIN Code: The 8th character of the VIN number indicates engine code. The 10th character shows the model year. Overview Aluminum construction for increased reliability High-strength silicone boots included Eliminates rubber cracking issues Powder coat options available Drop-in replacement with factory fitment
Note:
HSP is currently making a running change to boot styles. You may receive boots without logos — this ensures continued delivery of the high-quality parts you expect. Our Warranty HSP "NO BS" LIMITED LIFETIME WARRANTY At HSP, we believe in our products and stand firmly behind everything we make. For years, we've gone above and beyond to support our customers — even without a formal warranty. Now, with the No BS Warranty, we've made our commitment official. You can trust that you're covered with a lifetime guarantee that actually means something. Click here to read the 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.