HSP Diesel Factory Replacement Coolant Tank for 2007.5-2010 Chevrolet and GMC LMM Duramax
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Colours and prices as published by HSP Diesel · verified 9/8/2026
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- Ships from HSP Diesel
HSP Factory Replacement Coolant Tank for 2007.5-2010 Chevrolet / GMC Duramax LMM Part Number: 427-HSP The 427-HSP is best known as the HSP Factory Replacement Coolant Tank for the 2007.5-2010 LMM Duramax-equipped Chevrolet and GMC trucks. This tank not only enhances the engine bay appearance but is a direct replacement that performs exactly like the factory part—only better. Why Choose the HSP Factory Replacement Coolant Tank? The OEM coolant tank on LMM Duramax trucks is prone to failure. Cracks and broken fittings are common issues due to its plastic construction. Over time, it also yellows and becomes an eyesore in the engine bay. Once compromised, repair isnt an option—only replacement. Thats where the HSP tank comes in. What Makes the HSP Coolant Tank Better? The HSP Factory Replacement Coolant Tank is crafted from CNC-cut and bent aluminum for superior strength and heat resistance. It can be powder coated to match or accent your engine bay, providing both form and function. The design retains all OEM fittings and sensor compatibility, making installation easy and clean. Whats Included 1x Coolant Tank (HSP-IN-708) 1x Radiator Cap (RFB-806-RFAB) 14x 1/2" Heater Hose (RFB-400-RFAB) 2x 1/2" Worm Gear Clamp (RFB-405-RFAB) 1x 1" Worm Gear Clamp (RFB-406-RFAB) 1x Low Coolant Sensor (RFB-459-RFAB) Fitment LMM: 2007.5-2010 (VIN Code 6)
Note:
The 8th character of the VIN indicates the engine code, and the 10th character represents the model year. Overview Drop-in design with OEM compatibility Factory sensor and fitting provisions Constructed from CNC cut and bent aluminum Eliminates cracking and yellowing from plastic tanks Powder coat options available for a clean engine bay Our Warranty HSP NO BS LIMITED LIFETIME WARRANTY At HSP, we believe in our products and stand firmly behind every single one that leaves our facility. For years, weve supported our customers with flexible, top-tier service—even without a formal policy. Now, weve made it official. Our No BS Warranty outlines the process and your protections clearly and simply. Click here to read the full HSP Warranty
HSP Factory Replacement Coolant Tank for 2007.5-2010 Chevrolet / GMC Duramax LMM Part Number: 427-HSP The 427-HSP is best known as the HSP Factory Replacement Coolant Tank for the 2007.5-2010 LMM Duramax-equipped Chevrolet and GMC trucks. This tank not only enhances the engine bay appearance but is a direct replacement that performs exactly like the factory part—only better. Why Choose the HSP Factory Replacement Coolant Tank? The OEM coolant tank on LMM Duramax trucks is prone to failure. Cracks and broken fittings are common issues due to its plastic construction. Over time, it also yellows and becomes an eyesore in the engine bay. Once compromised, repair isnt an option—only replacement. Thats where the HSP tank comes in. What Makes the HSP Coolant Tank Better? The HSP Factory Replacement Coolant Tank is crafted from CNC-cut and bent aluminum for superior strength and heat resistance. It can be powder coated to match or accent your engine bay, providing both form and function. The design retains all OEM fittings and sensor compatibility, making installation easy and clean. Whats Included 1x Coolant Tank (HSP-IN-708) 1x Radiator Cap (RFB-806-RFAB) 14x 1/2" Heater Hose (RFB-400-RFAB) 2x 1/2" Worm Gear Clamp (RFB-405-RFAB) 1x 1" Worm Gear Clamp (RFB-406-RFAB) 1x Low Coolant Sensor (RFB-459-RFAB) Fitment LMM: 2007.5-2010 (VIN Code 6)
Note:
The 8th character of the VIN indicates the engine code, and the 10th character represents the model year. Overview Drop-in design with OEM compatibility Factory sensor and fitting provisions Constructed from CNC cut and bent aluminum Eliminates cracking and yellowing from plastic tanks Powder coat options available for a clean engine bay Our Warranty HSP NO BS LIMITED LIFETIME WARRANTY At HSP, we believe in our products and stand firmly behind every single one that leaves our facility. For years, weve supported our customers with flexible, top-tier service—even without a formal policy. Now, weve made it official. Our No BS Warranty outlines the process and your protections clearly and simply. 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.