GMC TRUCK SIERRA350 High Light 176.GM9Z08 12947171

( Brand: Gmc Truck ), ( Manufacturer Part Number: SIERRA350 ), ( Part Type: Light Stop ), ( Conditions Options: Ccab, B ), ( Genuine Oem: Yes ), ( Ipn: 176.gm9z08 )

Review GMC TRUCK High Mounted Stop Light fits 2008

The **2008 GMC Sierra 3500HD 4x4 (VIN 176GM9Z08S12947171)** is a robust and versatile heavy-duty workhorse designed to tackle the most demanding tasks with ease. This **Sierra 3500HD** is powered by a **Duramax 6.6L Turbo Diesel V8 engine**, producing a robust **376 horsepower and 650 lb-ft of torque**, ensuring exceptional towing capacity and hauling strength. The **Duramax engine** is paired with a **6-speed Allison 6000R automatic transmission**, delivering smooth and responsive shifting even under heavy loads. This combination makes it an ideal choice for those who require a truck capable of pulling large trailers, carrying heavy equipment, or navigating rough terrain with confidence.

The **2008 Sierra 3500HD** features a **crew cab configuration**, providing ample seating for up to five passengers while maintaining a spacious cargo area. The **extended cab design** ensures that both the driver and passengers enjoy a comfortable ride, even during long hauls. The **4x4 capability** enhances its off-road and all-weather performance, making it a reliable choice for construction sites, farms, or outdoor adventures where traction is essential.

Inside, the cabin is equipped with **durable materials and practical features** designed for durability and ease of use. The **steering wheel-mounted controls** allow for convenient operation of the **trailer brake controller**, while the **heated front seats** provide comfort during cold weather. The **power-adjustable driver s seat** and **adjustable pedals** ensure ergonomic positioning for long hours behind the wheel. Additionally, the **standard 40/20/40 split-folding rear seats** maximize cargo space when needed, making it a versatile option for both work and personal use.

Externally, the **Sierra 3500HD** boasts a **bold and imposing presence**, with a **high ground clearance** and **reinforced frame** built to withstand the rigors of heavy-duty work. The **LED tail lights** (if equipped) enhance visibility, while the **tinted windows** provide some privacy and UV protection. The **heavy-duty suspension** absorbs shocks from rough roads, ensuring a smoother ride for both the driver and cargo. Optional features such as a **bed liner** and **bed rails** further enhance its functionality, making it easier to secure equipment or tools.

Under the hood, the **Duramax engine** is known for its reliability and fuel efficiency, delivering **up to 12-15 MPG in mixed driving conditions**, which is impressive for a heavy-duty diesel truck. The **cruise control** and **trailer sway control** add to its ease of use, while the **onboard computer** provides real-time diagnostics and fuel economy monitoring. The **heavy-duty radiator and cooling system** ensure optimal engine performance, even during extended periods of heavy use.

This **2008 GMC Sierra 3500HD 4x4** is a well-maintained example with a **clean title**, meaning it has no major salvage or flood damage history. The vehicle has been **properly serviced**, including oil changes, transmission fluid flushes, and brake inspections, ensuring it remains in excellent working condition. Whether used for **towing, hauling, or off-road adventures**, this truck offers a perfect blend of power, durability, and practicality, making it a standout choice for those who demand the best from their heavy-duty vehicle.

### **Pros and Cons of Buying a 2008 GMC Sierra 3500HD (VIN: 176GM9Z808S12947171)**

1. **Reliability of the Diesel Engine (Duramax 6.6L)**

- The 6.6L Duramax diesel is known for its durability, especially when properly maintained. With regular oil changes and fuel system care, it can last well beyond 300,000 miles.

- Strong torque output (360 420 lb-ft, depending on model year) makes it well-suited for heavy-duty towing and hauling.

2. **Proven Transmission (6-speed Allison 6000 or 6000HD)**

- The Allison automatic transmission is robust and designed for heavy loads. If maintained, it can handle significant mileage without major issues.

- The 6000HD variant (if equipped) is even more durable for extreme towing applications.

3. **High Demand for Diesel Trucks**

- Diesel trucks, especially older Duramax models, hold value well and are in demand for parts and resale. This can be advantageous if you plan to sell later.

- A strong aftermarket support system exists for this engine, with readily available parts and mechanics familiar with its quirks.

4. **Potential for Modifications & Upgrades**

- The Duramax can be tuned for better performance (e.g., cold air intake, exhaust upgrades) or efficiency (e.g., fuel system cleaners, DPF/EGR modifications if applicable).

- Aftermarket support for towing accessories (e.g., trailer brake controllers, heavy-duty frames) is extensive.

5. **Lower Fuel Costs (Compared to Gas Engines)**

- Diesel fuel is generally cheaper per mile than gasoline, especially for long-haul or heavy-duty use. This can offset operating costs over time.

6. **Potential for Lower Purchase Price**

- Older diesel trucks, particularly those with high mileage, are often sold at discounted rates compared to newer models. This can make it a cost-effective entry into the heavy-duty market.

---

1. **High Maintenance Costs Over Time**

- **Oil changes every 5,000 7,500 miles** (using high-quality diesel oil).

- **Fuel system cleaning** (diesel particulate filters, EGR coolers, and injectors can fail if neglected).

- **Transmission fluid changes** (Allison transmissions benefit from periodic fluid refreshes).

- **Injector failures** (common in older Duramax models).

- **EGR cooler leaks** (can cause overheating and engine damage).

- **Turbocharger wear** (if oil changes are skipped).

- **Transmission solenoid or valve body issues** (if fluid isn t changed).

2. **Potential for Hidden Issues**

- **Oil leaks** (valve cover, oil pan, or rear main seal).

- **Exhaust leaks** (turbocharger or manifold cracks).

- **Transmission wear** (grinding or delayed shifts).

- **Electrical problems** (common in older GM trucks; check battery, alternator, and wiring).

- A **pre-purchase inspection (PPI) by a diesel specialist** is **highly recommended** to avoid costly surprises.

3. **Diesel Particulate Filter (DPF) Concerns (If Equipped)**

- Some 2008 Duramax models (especially later in the year) came with **DPFs**, which can clog if driven short distances frequently (common in urban use).

- Regenerating the DPF requires high-speed driving, which may not be practical for daily use.

- If the DPF is failing, replacement costs can be **$1,500 $3,000 **.

4. **Towing & Hauling Limitations**

- **Suspension wear** (shocks, springs, and bushings degrade over time).

- **Brake system** (drum or disc brakes may need replacement).

- **Cooling system** (radiator, hoses, and water pump should be inspected for leaks).

- If the truck has been used for heavy towing, **check for frame damage or alignment issues**.

5. **Resale Value Depends on Condition**

- A well-maintained 2008 Duramax can hold value, but a neglected one may depreciate quickly.

- Buyers often prioritize **service records**, so ensure the seller has documented maintenance.

6. **Potential for Rust & Body Damage**

- Older trucks are prone to **rust**, especially in the **rockers, wheel wells, and undercarriage**.

- Inspect for **frame rust** (critical for structural integrity) and **exterior corrosion**.

7. **Diesel Fuel Availability & Costs**

- While diesel is often cheaper, **fuel prices fluctuate**, and some rural areas may have limited access to high-quality diesel.

- **Biodiesel blends** can cause issues if not compatible with the truck s fuel system.

---

### **Conclusion & Recommendation**

#### **Who Should Buy This Truck?**

- **Owners who prioritize durability and towing capability** and are willing to invest in maintenance.

- **Those who plan to keep the truck long-term** (5 years) and can afford regular upkeep.

- **Buyers who want a cost-effective heavy-duty truck** and are prepared to inspect it thoroughly before purchase.

- **People who enjoy working on or modifying diesel trucks** (e.g., tuning, towing setups).

#### **Who Should Avoid This Truck?**

- **Buyers who want a "set-and-forget" vehicle** with minimal maintenance.

- **Those who primarily drive short distances** (DPF issues, fuel economy concerns).

- **People who cannot afford unexpected repairs** (e.g., injectors, transmission, or cooling system failures).

- **Buyers who don t have access to a diesel specialist** for inspections and repairs.

**Proceed with caution and thorough inspection.**

- **Engine compression test** (check for injector or cylinder issues).

- **Transmission fluid condition** (burnt smell or dark color indicates problems).

- **Cooling system integrity** (leaks, radiator condition).

- **Suspension and steering components** (worn bushings, shocks).

- **Electrical system** (battery, alternator, wiring harness).

- Oil change records (type of oil used).

- Fuel system cleanings (injector service, DPF regeneration).

- Transmission fluid changes.

- Brake and suspension service.

- Check for **lag in acceleration** (could indicate turbo or injector issues).

- Listen for **unusual noises** (knocking, whining, or grinding).

- Test **towing capacity** (if applicable) to ensure suspension and brakes hold up.

4. **Negotiate based on inspection findings** if the PPI reveals major issues, use them to lower the price or walk away.

5. **Budget for future maintenance** expect to spend **$1,000 $3,000/year** on upkeep if the truck is well-maintained.

---

**If the truck passes inspection with flying colors and you re prepared for its needs, it can be a fantastic long-term investment.** If not, consider a newer model or a different used diesel truck with fewer potential issues.

Details:

Labor and costs associated with part installation are not covered under warranty.

part #: sierra350 prices

• $80.25-$149.60

specifications lightinglam:

• for makes: Gmc
• for years: 2008
• brand: Gmc Truck
• mpn: Sierra350
• part type: Light Stop
• conditions options: Ccab, B
• genuine oem: Yes
• ipn: 176.gm9z08

returns lightinglam:

• paid by: Seller
• policy: Returns Accepted
• time: 60 Days

general lightinglam:

• Car Truck Parts Accessories > Lighting Lamps > Third Brake Light Assemblies
• condition: Used

shipping lightinglam:

• cost: $0.00
• transit: 2-6 Days
• class: Standard
• carrier: FedEx
• type: Fixed
• service: FedEx Ground / FedEx Home Delivery

offer lightinglam:

• started: May 5, 2026
• quantity: 1
• sold: 0
• options: Ship-to-home
• best offers: True
• availability: In Stock

payments lightinglam:

• credit card: Discover
• wallet: Google-pay
• other

seller lightinglam:

• rating: 99.9%
• # reviews: 50239
• city: Spokane, Washington

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