• Features
  • Premium Quality: The thermostat assembly is made of reinforced material to allow for long-term use, which has high sealing performance and high temperature resistance. And it has undergone durability testing according to strict manufacturing standards and undergoes extensive testing before leaving the factory for reliable performance.
  •  
  • Stable performance: The thermostat assembly can regulate the flow of coolant to the radiator and adjust the heat dissipation capacity to ensure that the engine operates within the appropriate temperature range, ensuring effective cooling and preventing any overheating issues, thereby promoting the overall health and service life of the engine.
  •  
  • Thermostat For GMC Sierra 1500 2014-2018 V6 4.3L 4.3L 5.3L 6.2L Water Outlet

    Features

    Premium Quality: The thermostat assembly is made of reinforced material to allow for long-term use, which has high sealing performance and high temperature resistance. And it has undergone durability testing according to strict manufacturing standards and undergoes extensive testing before leaving the factory for reliable performance.

     

    Stable performance: The thermostat assembly can regulate the flow of coolant to the radiator and adjust the heat dissipation capacity to ensure that the engine operates within the appropriate temperature range, ensuring effective cooling and preventing any overheating issues, thereby promoting the overall health and service life of the engine.

     

    Directly Replace: The thermostat assembly is designed to match the function, which can directly replace original part and work like the original one

     

    PROFESSIONAL SERVICE: Your 100% satisfaction is always the No.1 priority to us. Feel free to contact us directly if you have any questions. We aim to provide you the best product and service.

     

     

    What Are the Signs of a Failing Thermostat?

    Overheating (or overcooling)

    Coolant leaking

    Erratic temperature changes

    Strange sounds

    Heater problems

     

    How to Replace a Thermostat in a Car

    Part 1 Removing the Old Thermostat

    1. Wait for the engine to cool down if you drove recently.

    2. Take the cap off of your radiator.

    3. Put a drip pan underneath your radiator’s drain plug.

    4. Drain half of the coolant out from your radiator’s drain valve.

    5. Unbolt the thermostat housing from the engine block with a ratchet.

    6. Pull the old thermostat out with a pair of pliers.

     

    Part 2 Installing the New Thermostat

    1. Get a replacement thermostat and gasket with the same heat rating.

    2. Remove any residue from the housing and engine flanges with a scraper.

    3. Put the thermostat in the engine flange so the valve points up.

    4. Line the new thermostat gasket up on the flange.

    5. Bolt the housing back onto the engine.

     

    Part 3 Refilling the Coolant

    • Pour coolant into the reservoir up to the fill line.
    • Screw on the radiator cap to seal it.
    • Start your vehicle’s engine to run coolant through the system.
    • Top off your coolant once your engine cools down again.

     

    Fitment:

     

    For 2015-2020 Cadillac Escalade
    For 2014-2019 Chevrolet Silverado
    For 2015-2020 Chevrolet Suburban
    For 2015-2020 Chevrolet Tahoe
    For 2014-2019 GMC Sierra
    For 2015-2020 GMC Yukon

     

    PART NUMBERS: 

     

    12674639 ; 12650534 ; 12650536 ; 12657137 ; 12666569 ; 12671393

     

    Package Include:

     

    1x Water Pump Outlet + Thermostat


    Item Specifics
    Brand SPARKWHIZ
    Type Thermostat 12674639
    Lifetime Over 50000 hours
    Manufacturer Part Number 12674639 GM12671393 12666569 12650534 12671393 12650536
    OE/OEM Part Number 12674639 GM12671393 12666569 12650534 12671393 12650536
    About after-sales Money back or replacement(Buyer's choice)
    Material Plastic
    Manufacturer Warranty Lifetime
    Features Easy Installation
    Interchange Part Number 12674639
    Superseded Part Number 12674639 GM12671393 12666569 12650534 12671393 12650536
    Opening Temperature 98°C / 208.4°F
    Features 2 Durability Tested
    Note No instructions included, Professional installation recommended
    Universal Fitment No
    Fitment Type Direct Replacement
    Performance Part No
    Items Included Temperature Sensor
    Funtion save fuel costs
    Funtion 1 Improve fuel efficiency
    Fitment1 For 2015-2020 Cadillac Escalade
    Fitment2 For 2014-2019 Chevrolet Silverado
    Fitment3 For 2015-2020 Chevrolet Suburban
    Fitment4 For 2015-2020 Chevrolet Tahoe
    Fitment5 For 2014-2019 GMC Sierra
    Fitment6 For 2015-2020 GMC Yukon
    color Black
    Features 6 100% Leak Tested
    Replaces part number 15-11125 ‎12674639 12666569 12657137
    Item Length 5.12"
    Item Width 3.62"
    Item Height 1.34"
    Grade Type Regular
    Gasket Type O-Ring
    Vintage Part No
    Number Of Outlet Ports 2
    Item Weight 0.34 kg / 0.75 lb
    Number of Bolt Holes 3
    Number of Seals 1
    Mounting Hardware Included No

    Payment

    We accept Payoneer/Paypal/Google Pay/Visa/Master Card/Amex/Discover for Payment.

    Payment must be received within 7 business days of auction closing.

    We ship to ebay's address only. Please make sure your address in EBAY is matched with your shipping address before you pay.

    TOTAL AMOUNT DUE includes the final auction price plus S&H (Shipping and Handling).

    S&H will be determined based upon the ship to address.

    Shipping

    All package will be shipped within 1-3 business day.

    Returns
    How to send a return request:

    1.We stand behind every buyer.Items can be returned for exchange or refund within 60 days.

    2.Please contact us when you have any confusion of our item, we will solve the trouble for you as soon as possible.

     
     

     

    Contact Us

    1.This is professional Seller.We will reply your message within 24 hours.

    2.Please contact us whenever you have any question about the item. We will deal with it as soon as possible.

    Thermostat For GMC Sierra 1500 2014-2018 V6 4.3L 4.3L 5.3L 6.2L Water Outlet


    We accept Payoneer/Paypal/Google Pay/Visa/Master Card/Amex/Discover for Payment.

    Payment must be received within 7 business days of auction closing.

    We ship to ebay's address only. Please make sure your address in EBAY is matched with your shipping address before you pay.

    TOTAL AMOUNT DUE includes the final auction price plus S&H (Shipping and Handling).

    S&H will be determined based upon the ship to address.

    All package will be shipped within 1-3 business day.

    How to send a return request:

    1.We stand behind every buyer.Items can be returned for exchange or refund within 60 days.

    2.Please contact us when you have any confusion of our item, we will solve the trouble for you as soon as possible.

     
     

     

    1.This is professional Seller.We will reply your message within 24 hours.

    2.Please contact us whenever you have any question about the item. We will deal with it as soon as possible.


    All rights reserved.



    On Sep 22, 2025 at 19:00:41 PDT, seller added the following information:

    Datacaciques