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    Home 2026 GMC Sierra 3500 HD SLE 6.6L V8 - Diesel Water Pump

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    2026 GMC Sierra 3500 HD

    SLE 6.6L V8 - Diesel

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    Cooling System
    Cooling System
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    Water Pump for 2026 GMC Sierra 3500 HD

    Diagram 1 1. Lower Diagram 2 2. Lower 3. Engine Coolant Thermostat Housing Gasket
    No.
    Part # / Description / Price
    Price
    7
    12743523 - Cooling System: Engine Coolant Thermostat Housing for GM Image
    Housing
    12743523
    GM GM
    Positions: Lower
    Description: 6.6L diesel. Silverado, sierra. 6.6l. Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD.
    MSRP $224.94
    $129.34
    MSRP $224.94
    $129.34
    12
    12737234 - Cooling System: Engine Coolant Bypass Pipe for GM Image
    By-Pass Pipe
    12737234
    GM GM
    Description: 6.6L diesel. Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD.
    MSRP $82.24
    $47.70
    MSRP $82.24
    $47.70
    14
    12737097 - Cooling System: Engine Coolant Bypass Hose Gasket for GM Image
    By-Pass Pipe Gasket
    12737097
    GM GM
    Positions: Lower
    Description: 6.6L diesel. By-pass pipe,gasket. Bypass Pipe to Water Pump.
    MSRP $8.42
    $5.05
    MSRP $8.42
    $5.05