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Reliable Block Heaters for Trucks
A truck block heater keeps your diesel or gasoline engine warm in cold weather, making it easier to start, reducing battery strain, and minimizing engine wear. For drivers and fleet owners working in low‑temperature regions, a reliable heater is essential for performance and fuel efficiency.
Truck Block Heater vs. Regular Block Heater
While most block heaters warm the engine coolant, truck block heaters are designed for larger displacement engines, such as heavy‑duty pickups, tractors, and semi‑trucks. They deliver higher wattage and robust thread fittings for a secure seal under extreme vibration.
Tip: Don’t mix truck‑grade block heaters with small‑engine types (used for compact tractors or generators). Always check the thread size, wattage, and compatibility before ordering.
Types of Truck Block Heaters
Our truck block heater lineup covers multiple designs to match your vehicle’s requirements and climate conditions.
1. Main Heater Types
| Type | Power Rating | Connection | Ideal For |
| Screw-In / Immersion Heater | 400W – 1500W @ 120V | 3/4' or 1' NPT Thread | Ford F-Series, Dodge Ram, Chevy Silverado, and other pickup trucks |
| External Circulation Heater | 1000W – 2000W+ | Inline hose or tank mount | Cummins, Caterpillar, Mack, International, and other heavy-duty trucks and construction equipment |
2. Related Products & Accessories
- Heater Kits: We offer complete kits that include the heater body, power cord, and protective cap for a convenient, all-in-one installation. Available for a wide range of models, including Dodge Ram, Ford Powerstroke, and Chevy Duramax.
- Replacement Cords: If your heater is working properly but the power cord is aged, damaged, or lost, we provide replacement cords that meet OEM specifications or match Zerostart styles, offering a cost-effective repair solution.
How to Choose the Right Truck Block Heater
Buying the correct block heater ensures safe, fast starts even in sub‑zero conditions. Here’s how to find your match:
1. Match by OEM Part Number
2. Check Engine Type and Size.
Identify your engine model (e.g., Cummins 6.7L, Powerstroke 7.3L, or Duramax 6.6L). Truck heaters are sized by wattage to match the engine’s coolant volume.
- 400 – 750 W: Light trucks or medium diesels
- 1000 – 1500 W: Heavy‑duty pickups & semi‑trucks
- 1800 – 2000 W: Large construction or fleet vehicles
3. Confirm Thread Size and Voltage.
Most North American trucks use 120 V systems and 3/4” NPT or 1” NPT threads. Always verify the thread size fits your block port.
4. Consider the Environment
- Regions below −10 °C (14 °F): Choose 1000 W+ for faster warm‑up.
- Mild climates: 400–750 W may be sufficient.
- Extreme climate or fleet use: External circulation heaters (Hotstart style) last longer and heat faster.
Installation & Safety Tips
- Always unplug the heater before the engine starts.
- Route cords away from exhaust and moving parts.
- Use outdoor‑rated extension cords and outlets.
- Replace cracked or melted cords immediately.
- Test before winter—connect for 15–20 minutes and check for warmth.
Get powerful, affordable, and reliable truck block heaters that deliver OEM quality without the dealership price. Shop Truck Block Heaters at FridayParts.com.