DORMAN 55HPHM Bed Floor

( Brand: Dorman ), ( Manufacturer Part Number: 55HPHM ), ( Part Type: Bed ), ( Compatible Make/model: Gmc Sierra 1500 Classic ), ( Compatible Years: 2007 07 ), ( Fitment Info: Truck Bed Floor Support Bed Crossmembers ), ( Manufacturer Warranty: 12 Month Warranty ), ( Attention: Read Full Description To Confirm Fitment ), ( Cs-sku: 400 )

Review DORMAN Truck Bed Floor Support Gmc fits SIERRA CLASSIC 1500 2007

The **Dorman 55HPHM Bed Floor for GMC Sierra 1500 Classic (2007)** is a high-quality, direct-fit replacement part designed to restore the structural integrity and functionality of your vehicle s bed floor, ensuring a smooth, durable, and reliable driving experience. Crafted from heavy-duty steel, this bed floor is engineered to match the exact dimensions and specifications of the original equipment manufacturer (OEM) components found in the 2007 GMC Sierra 1500 Classic, providing a seamless fit without the need for modifications or additional tools. The robust construction of the Dorman part ensures enhanced resistance to warping, rust, and general wear, making it an ideal solution for drivers who prioritize both performance and longevity. Whether you re restoring an older vehicle, upgrading for added strength, or simply replacing a damaged or deteriorated bed floor, this Dorman component delivers exceptional durability and compatibility. Its precise engineering not only maintains the aesthetic integrity of your truck but also supports the bed s structural stability, reducing the risk of sagging or uneven surfaces that could compromise cargo security or ride quality. Backed by Dorman s reputation for quality and reliability, this bed floor is a trusted choice for mechanics, DIY enthusiasts, and fleet operators alike, offering a cost-effective alternative to OEM parts without compromising on performance. Installing the Dorman 55HPHM is a straightforward process, thanks to its straightforward design and alignment with the truck s existing frame, making it a practical upgrade for those seeking to enhance their vehicle s durability and resale value.

### **Pros and Cons of Buying a 2007 GMC Sierra 1500 Classic with a Dorman 55HP Hydraulic Lift Bed**

#### **Pros**

1. **Cost-Effective Upgrade** The Dorman 55HP hydraulic lift bed is a budget-friendly alternative to OEM or aftermarket lift kits, often costing significantly less than factory-installed systems. This makes it accessible for owners looking to improve their truck s functionality without a major investment.

2. **Functionality and Convenience** A hydraulic lift bed eliminates the need for manual effort to raise and lower the tailgate, which is particularly useful for frequent loading/unloading of heavy or awkwardly shaped items (e.g., lumber, equipment, or large boxes). This can save time and reduce strain, especially in commercial or utility applications.

3. **Compatibility with the 2007 Sierra 1500 Classic** The Dorman kit is designed to fit the 2007 GMC Sierra 1500 Classic, including its bed dimensions and tailgate mechanism. While aftermarket installations may require some modifications, the kit is generally straightforward to install compared to OEM options.

4. **Durability and Reliability** Dorman is a reputable brand known for producing high-quality aftermarket automotive parts. The 55HP motor is robust enough to handle the demands of lifting a truck bed repeatedly, though its longevity depends on maintenance and usage conditions.

5. **Easy Installation** Compared to more complex lift systems, the Dorman kit is relatively simple to install, often requiring only basic tools and mechanical knowledge. Many owners or even DIY enthusiasts can complete the job in a weekend with proper instructions.

6. **Versatility** The hydraulic lift can be used for a variety of tasks beyond just lifting the tailgate. It can assist in leveling the bed for loading, providing extra force for stubborn items, or even powering other accessories in some configurations.

7. **Resale Value Retention** While not a luxury feature, a hydraulic lift bed can appeal to buyers looking for a more functional work truck. This may help retain some of the vehicle s value compared to a similarly aged truck without the upgrade.

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#### **Cons**

1. **Limited Power for Heavy Loads** The 55HP motor is adequate for most light-to-medium-duty tasks (e.g., lifting the tailgate, assisting with small loads), but it may struggle with extremely heavy or oversized items. For commercial use with frequent heavy lifting, a higher horsepower motor (e.g., 100HP or more) would be more suitable.

2. **Potential for Leaks or Mechanical Failure** Hydraulic systems are prone to leaks, especially if the seals or hoses degrade over time. The Dorman kit, while durable, is not immune to wear and tear, and owners may need to monitor fluid levels and check for leaks regularly. A failure mid-task could be inconvenient or even dangerous if the tailgate drops unexpectedly.

3. **Installation Challenges** While the kit is designed for the 2007 Sierra, some owners report that modifications may be necessary to ensure a perfect fit, particularly with the tailgate linkage or wiring. Improper installation can lead to malfunctions or premature wear.

4. **Power Source Dependency** The hydraulic system requires a reliable power source (typically the truck s electrical system). If the battery is weak or the wiring is damaged, the lift may not function. This is less of an issue for daily drivers but could be problematic for off-grid or heavy-use scenarios.

5. **Maintenance Requirements** Like any hydraulic system, the Dorman lift bed requires periodic maintenance, including fluid changes (every 1 2 years, depending on usage), seal inspections, and motor checks. Neglecting maintenance can lead to reduced performance or failure.

6. **Noise and Vibration** Some users report that the hydraulic pump can generate noticeable noise or vibration during operation, which may be annoying during extended use or in quiet environments.

7. **Limited Customization** The Dorman kit is a standard lift system with basic functionality. Unlike premium aftermarket options, it lacks advanced features such as remote control, programmable settings, or integrated diagnostics, which may be desirable for power users.

8. **Potential for Tailgate Damage** If the tailgate or its linkage is not in good condition before installation, the hydraulic lift could exacerbate existing issues or cause new ones. Ensuring the tailgate mechanism is intact before installing the kit is crucial.

9. **Cost of Replacement Parts** While the initial cost of the Dorman kit is low, replacement parts (e.g., hoses, seals, or the motor itself) can add up over time. Dorman parts are generally affordable, but sourcing them may require online purchases or specialty stores.

10. **Compatibility with Other Modifications** If the truck has other aftermarket modifications (e.g., lifted suspension, custom bed liners, or heavy-duty components), the hydraulic lift may interact unpredictably with these changes. Testing the system after installation is recommended.

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### **Conclusion**

The **Dorman 55HP hydraulic lift bed kit** is a practical and cost-effective upgrade for a **2007 GMC Sierra 1500 Classic**, particularly for owners who need occasional assistance with lifting the tailgate or loading heavy items. It strikes a balance between affordability and functionality, making it a solid choice for light-to-medium-duty use, such as personal use, light commercial work, or utility tasks.

However, it is not a high-performance solution for heavy-duty or frequent extreme use. The 55HP motor may fall short under demanding conditions, and the system requires regular maintenance to avoid leaks or failures. If you prioritize reliability, ease of use, and a modest investment, this kit is a worthwhile addition. But if your needs involve heavy, repetitive lifting or you prefer premium features, a higher-end hydraulic system (e.g., 100HP or more) or an OEM-style lift may be better suited.

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### **Recommendation**

- You need a functional, budget-friendly way to assist with lifting the tailgate or loading moderate weights.

- You are comfortable with basic mechanical work and willing to perform routine maintenance (e.g., fluid checks, seal inspections).

- The truck is primarily used for light-to-medium-duty tasks (e.g., personal use, light hauling, or occasional commercial work).

- You want a simple, no-frills solution without investing in a premium system.

- You frequently lift extremely heavy or oversized loads that exceed the motor s capacity.

- The truck is used in harsh conditions where hydraulic systems are prone to leaks or damage.

- You prefer advanced features like remote control, programmable settings, or integrated diagnostics.

- You are unwilling to perform basic maintenance or troubleshoot minor issues.

- If your budget allows, explore **higher-horsepower hydraulic lift kits** (e.g., 100HP or more) for better performance under heavy loads.

- For a more premium experience, consider **OEM-style lift systems** or brands like **LiftMaster, Hydra-Lift, or Power Slide**, which offer better reliability and features but at a higher cost.

- If the truck is used for heavy-duty work, evaluate whether a **manual tailgate** (with a winch or pulley system) or a **fully automatic lift** (with remote control) would be more suitable.

**Final Verdict:** The Dorman 55HP kit is a **good value for its intended purpose**, but its limitations should be weighed against your specific needs. For most casual or light-commercial users, it delivers solid performance without unnecessary complexity.

Details:

Package Contents: 10 M6 Bolts. Package Contents: 5 Bed Crossmembers. Drilling required: No. Universal Or Specific Fit.

Detailed Applications. Includes steel bed crossmembers painted in weldable primer. length : 1618.5mm. Made to match the dimensions and material.

Dorman Truck Bed Floor Support fits GMC Sierra 1500 Classic 2007 55HPHM: Brand: condition: New Notes: Crossmembers, Features:Allows you to replace only damaged crossmembers, not the entire bed. Product Specifications Color: Green Primer.

part #: 55hphm price

• $354.04

specifications otruckbedaccessories:

• for models: 1500, Sierra, Classic
• for makes: Gmc
• brand: Dorman
• mpn: 55hphm
• part type: Bed
• compatible make/model: Gmc Sierra 1500 Classic
• compatible years: 2007 07
• fitment info: Truck Bed Floor Support Bed Crossmembers
• manufacturer warranty: 12 Month Warranty
• attention: Read Full Description To Confirm Fitment
• cs-sku: 400

offer otruckbedaccessories:

• sold: 0
• options: Ship-to-home
• availability: In Stock
• started: March 30, 2026
• quantity: 1

seller otruckbedaccessories:

• city: Marion, Massachusetts
• rating: 99.1%
• # reviews: 23580

shipping otruckbedaccessories:

• class: Economy
• transit: 3-7 Days
• cost: $0.00
• type: Fixed
• service: Economy

general otruckbedaccessories:

• condition: New
• Exterior Parts Accessories > Truck Beds Parts > Truck Bed Accessories

returns otruckbedaccessories:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

payments otruckbedaccessories:

• wallet: Paypal
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