fits year: 2024–2025.

( Brand: Gm ), ( Manufacturer Part Number: 85136587 ), ( Model: 2500 3500 ), ( Part Type: Cover Bumper ), ( Genuine Oem: Yes ), ( Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Make: Gmc ), ( Year: 2024 2025 ), ( Parts Included: Only Part Reference 13 On The Diagram Is Included ), ( Placement On Vehicle: Right )
The **GM 85136587** is a high-performance, precision-engineered **automotive brake master cylinder** designed for heavy-duty applications, ensuring reliable stopping power and optimal hydraulic efficiency in demanding driving conditions. Crafted from durable **cast aluminum** with a robust, corrosion-resistant finish, this master cylinder is built to withstand the rigors of frequent use, extreme temperatures, and prolonged exposure to moisture, making it an ideal choice for both original equipment and aftermarket installations. Its **dual-piston design** delivers superior hydraulic pressure distribution, reducing pedal effort while maintaining consistent braking performance across all wheel cylinders, even under heavy loads. The internal components feature **high-grade steel and precision-machined seals**, including a reinforced **primary and secondary piston assembly**, which minimizes internal leakage and extends the lifespan of the system. The **integrated reservoir** is constructed from a durable, transparent polycarbonate material, allowing for easy visual inspection of fluid levels, while its secure mounting ensures minimal vibration-induced fluid sloshing. This master cylinder is engineered to meet or exceed **SAE and OEM specifications**, ensuring compatibility with a wide range of **full-size trucks, SUVs, and performance vehicles**, including applications requiring **air-over-hydraulic or heavy-duty brake systems**. Whether installed in a **towing setup, off-road vehicle, or high-performance brake upgrade**, the GM 85136587 provides a seamless blend of durability, responsiveness, and long-term reliability, making it a trusted component for drivers who demand nothing less than exceptional braking performance.
**Pros and Cons of buying a GM 85136587 (Chevy 2500HD 2015-2017 Duramax Diesel Truck)**
### **Overview**
The **GM 85136587** is a **2015-2017 Chevrolet Silverado 2500HD** with a **6.6L Duramax diesel engine** (L5P or L5P2 models). This truck is known for its heavy-duty capabilities, towing, and durability, but like any vehicle, it has advantages and drawbacks.
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### **Pros**
1. **Strong Engine and Performance**
- The **Duramax 6.6L diesel** produces **400-445 horsepower** and **800-850 lb-ft of torque**, making it one of the most powerful diesel engines in its class.
- Excellent **towing capacity** (up to **12,000 lbs** with proper equipment) and **payload capacity** (up to **6,000 lbs**).
- **Diesel fuel efficiency** ( 12-15 MPG combined) is better than most gasoline trucks in its class.
2. **Durability and Reliability**
- The **Duramax engine** is well-regarded for longevity, especially with proper maintenance.
- **Heavy-duty suspension, drivetrain, and transmission** (6-speed ZF or Allison automatic) are built for demanding work and towing.
- **Strong resale value** compared to many gasoline trucks in its class.
3. **Comfort and Features**
- **Spacious cab options** (Crew Cab and Extended Cab) with good visibility.
- **Comfortable ride** for a heavy-duty truck, especially with proper suspension tuning.
- **Modern amenities** (depending on trim) such as **Bluetooth, USB ports, heated seats, and available infotainment systems**.
- **Available 4x4 systems** (Dual Action or Regular) for off-road and snow traction.
4. **Aftermarket Support**
- **Extensive aftermarket parts and upgrades** available for performance, towing, and off-road use.
- **Common modifications** include **exhaust tuning, turbo upgrades, suspension lifts, and cooling system enhancements**.
5. **Fuel Flexibility (Optional)**
- Some models (especially **2016-2017**) offer **B20 biodiesel compatibility**, reducing reliance on traditional diesel.
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### **Cons**
1. **High Upfront Cost and Maintenance Expenses**
- **New or well-maintained examples** can be expensive, especially with high mileage.
- **Diesel fuel costs** are generally higher than gasoline, though efficiency helps offset this.
- **Maintenance can be costly** common issues include:- **DPF (Diesel Particulate Filter) clogging** (requires cleaning or replacement, often $1,000-$3,000).
- **EGR cooler failures** (can lead to engine damage if ignored).
- **Turbocharger wear** (common in high-mileage examples).
- **Transmission issues** (some ZF 6-speed transmissions have known problems with shifting).
2. **Complexity and Specialized Repairs**
- **Diesel engines require more specialized knowledge** for repairs compared to gasoline engines.
- **Emissions-related issues** (DPF, DEF system) can be problematic if not maintained properly.
- **Less common mechanics** may not be familiar with Duramax-specific repairs.
3. **Resale Depreciation**
- While it holds value better than many trucks, **diesel trucks still depreciate faster** than some gasoline alternatives.
- **High-mileage examples** (over 150,000 miles) may have **hidden issues** (DPF, turbo, transmission).
4. **Noise and Vibration**
- The **Duramax is loud** (especially at highway speeds) and can have noticeable **engine vibration** if not properly tuned.
- **Cab insulation** varies by trim some models are quieter than others.
5. **DEF (Diesel Exhaust Fluid) Requirement**
- **2010 Duramax models require DEF**, adding an extra cost ( $50-$100 per fill-up).
- **DEF system failures** can be expensive to repair.
6. **Limited Availability of Parts**
- While parts are available, **some aftermarket and OEM components** may take longer to source than for more common trucks.
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### **Key Considerations Before Buying**
1. **Mileage and Maintenance History**
- **Ideal mileage:** **Under 100,000 miles** (if well-maintained).
- **Critical maintenance records:** DPF cleaning, EGR cooler replacement, turbo inspection, transmission fluid changes.
- **Oil changes:** Must be done **every 5,000-7,500 miles** (diesel oil breaks down faster).
2. **Engine Generation Differences**
- **L5P (2011-2013):** Older, but still reliable if maintained.
- **L5P2 (2014-2017):** Improved emissions systems, but **DPF and DEF issues are more common**.
- **L5P3 (2017 ):** Later models have **better emissions handling**, but this model is outside the range.
3. **Towing and Payload Needs**
- If you **need max towing (12,000 lbs)**, ensure the truck has:- **Heavy-duty suspension**
- **Proper weight distribution**
- **Cooling system upgrades** (if towing heavily)
- **Payload capacity** should also be checked if carrying heavy loads.
4. **Fuel and Emissions Compliance**
- **DEF system must be functional** a failing system can lead to **check engine lights and reduced power**.
- **Diesel exhaust aftertreatment (DEAT) system** (DPF, SCR) requires **regular cleaning or replacement**.
5. **Test Drive and Inspection**
- Listen for **excessive noise** (turbo, exhaust, engine).
- Check for **smoke from exhaust** (blue oil burning, white coolant leak, black soot).
- **Transmission should shift smoothly** no jerking or delayed engagement.
- **Suspension should be firm but not harsh** check for leaks in shocks/struts.
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### **Conclusion and Recommendation**
#### **Best For:**- **Heavy-duty towing and hauling** (construction, farming, RV use).
- **Owners who prioritize fuel efficiency and longevity** over low maintenance costs.
- **Those who can afford higher upfront and maintenance costs** in exchange for power and durability.
- **Buyers who plan to keep the truck long-term** (5 years) and maintain it properly.
#### **Not Ideal For:**- **Budget-conscious buyers** who cannot afford diesel fuel, DEF, or potential repairs.
- **Those who want a low-maintenance, simple vehicle** diesel trucks require more attention.
- **Drivers who mostly do light duty** (daily commuting, minimal towing) a **gasoline truck or SUV** may be more practical.
- **People in areas with limited diesel fuel stations** (though this is less common in the U.S.).
#### **Final Recommendation:**- **If you find a well-maintained example (under 100,000 miles) with full service records**, the **GM 85136587 Duramax truck is an excellent choice** for heavy-duty use.
- **Budget $30,000-$50,000** for a **reliable, low-mileage unit** (prices vary by location and condition).
- **Prioritize DPF health, turbo condition, and transmission smoothness** when inspecting.
- **Be prepared for higher fuel and maintenance costs** but if you can manage them, this truck delivers **unmatched power and durability** for towing and work applications.
**Alternative Considerations:**- If **maintenance concerns are a dealbreaker**, look at **later-model Duramax trucks (2017 L5P3)** or **Ram 6.7L Cummins** (similar power, different reliability strengths).
- For **lower cost**, consider a **used gasoline heavy-duty truck** (Ford F-250 Super Duty, Ram 2500) if towing needs are moderate.
**Bottom Line:** The **GM 85136587 Duramax truck is a fantastic workhorse**, but it demands **proper care and budgeting**. If you re prepared for that, it s one of the best diesel trucks in its class. If not, explore alternatives that better fit your maintenance tolerance and budget.
Parts must be resalable and in the original packaging. Without Ave edition, nitrite. Electrical parts are not returnable. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer.