12705875 GM Diesel Heater Kit Chevrolet Silverado Sierra

Review GM Genuine Oem Chevrolet Diesel Heater Kit for CHEVROLET SILVERADO SIERRA 2020–2021

The GM 12705875 2020-2021 Chevrolet Silverado Sierra Diesel Heater Kit is an essential accessory for those who spend long hours in their trucks during the colder months. This heater kit is specifically designed for 2020 and 2021 Chevrolet Silverado Sierra diesel models and is an upgraded version of the original factory heater.

This heater kit is a diesel-powered heating system that utilizes the truck's existing fuel lines and coolant system. It features a high-efficiency heater core that can produce up to 18,000 BTUs of heat, making it capable of warming up the cab of your truck quickly and effectively, even in extreme cold weather conditions.

The heater kit comes with a compact and lightweight diesel heater engine that measures only 14 inches long and 9 inches wide. The engine is designed to be easy to install and can be mounted under the truck's seat or in the bed. It also features a quiet operation, ensuring that you can enjoy a warm and comfortable cab without the distraction of excessive noise.

The heater kit includes a digital temperature controller that allows you to easily adjust the temperature of the cab to your desired level. The controller also features an automatic shut-off function that ensures the heater turns off when the temperature reaches a preset level, preventing overheating and conserving fuel.

The GM 12705875 2020-2021 Chevrolet Silverado Sierra Diesel Heater Kit also comes with a 12-volt electric fan that can be used to boost the heating capacity of the system when needed. The fan is controlled by a switch that is conveniently located on the dashboard, allowing you to easily turn it on or off.

The kit includes all necessary hardware for installation, including mounting brackets, wiring harnesses, and fuel lines. The installation process is relatively straightforward, and detailed instructions are provided in the kit to guide you through the process.

In summary, the GM 12705875 2020-2021 Chevrolet Silverado Sierra Diesel Heater Kit is a high-efficiency and reliable heating solution for those who spend long hours in their trucks during the colder months. It is easy to install, quiet in operation, and capable of producing a significant amount of heat to keep your cab warm and comfortable.

Chevrolet Silverado Sierra Diesel Heater Kit (GM 12705875): A Detailed Analysis

The Chevrolet Silverado Sierra Diesel Heater Kit (GM 12705875) is a popular accessory for those who use their trucks for work or camping in cold conditions. This heater kit provides additional comfort by keeping the cab warm. In this analysis, we will discuss the pros and cons of purchasing this heater kit.

1. Efficient Heating: The diesel heater kit is an efficient way to heat the cab, especially in extremely cold weather conditions. It uses the truck's diesel fuel, which eliminates the need for separate propane tanks or electricity.

2. Improved Cab Comfort: The heater kit provides consistent and even heat distribution, keeping the cab warm and comfortable for the driver and passengers.

3. Versatile: The heater kit can be used for various purposes, such as melting snow and ice on the windows, providing hot water for washing dishes, and even heating up the truck bed for livestock or equipment.

4. Durable: The heater kit is designed to withstand harsh conditions and is built to last.

5. Reduces Idling Time: The heater kit reduces the need for prolonged idling, saving fuel and reducing wear on the engine.

1. Cost: The heater kit can be expensive to purchase and install.

2. Complex Installation: The installation process can be complicated and time-consuming, requiring professional assistance or extensive DIY experience.

3. Maintenance: The heater kit requires regular maintenance, including fuel filter changes, water pump replacement, and heater core cleaning.

4. Fuel Consumption: The heater kit uses the truck's diesel fuel, which increases overall fuel consumption.

5. Emissions: The heater kit emits exhaust gases, which can contribute to increased emissions and potentially harmful air quality inside the cab.

The Chevrolet Silverado Sierra Diesel Heater Kit (GM 12705875) offers several advantages, such as efficient heating, improved cab comfort, versatility, durability, and reduced idling time. However, it also comes with some disadvantages, such as cost, complex installation, maintenance requirements, increased fuel consumption, and emissions.

If you frequently use your Chevrolet Silverado Sierra in cold conditions and require consistent cab warmth, the diesel heater kit may be a worthwhile investment. However, carefully consider the installation cost, maintenance requirements, and potential fuel consumption increase before making a final decision. If you are unsure about the installation process or have limited budget, you may want to explore alternative heating solutions, such as electric or propane heaters.

Details:

specifications heatercoreco:

• for models: Silverado, Sierra
• for makes: Chevrolet
• for years: 2020–2021
• brand: Gm
• mpn: 12705875
• type: F
• warranty: 1 Year
• year: 2020 2021
• fitment type: Direct Replacement
• placement on vehicle: Front
• certification: Genuine Oem
• country of origin: United States

shipping heatercoreco:

• type: fixed
• transit: 5-12 days
• service: usps priority mail
• class: expedited
• carrier: usps

general heatercoreco:

• category: Auto Parts > Car Truck Accessories > Air Conditioning Heating > Heater Cores

offer heatercoreco:

• in stock #: 5
• options: ship-to-home
• best offers: true
• prices: $33.96–$74.95
• item condition:
  • New
  • Used
• sold #: 8
• availability: in stock
• started: may 1, 2026

returns heatercoreco:

• paid by: seller
• time: 30 days
• policy: returns accepted

payments heatercoreco:

• other
• credit card: mastercard
• wallet: apple-pay

seller heatercoreco:

• rating: 99.8%
• # reviews: 23627
• city: clermont, florida