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GM 15940309 Reservoir

2006-2011 Chevrolet HHR

Customer Questions & Expert Answers (2)
15940309 GM Reservoir Illustration 1 of 1
  • Part Description
    Tank, Engine Coolant Recovery
  • Replaces
    15817298, 15846040
  • Manufacturer
    General Motors
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  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine GM
    Manufacturer Part Number15940309
    Part DescriptionReservoir; Tank, Engine Coolant Recovery
    Item Dimensions18.4 x 12.2 x 12.5 inches
    Item Weight1.10 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces15817298, 15846040
    ManufacturerGeneral Motors
    SKU15940309
    WarrantyThis genuine GM part is guaranteed by GM's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65
  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    2006-2011 Chevrolet HHR4 Cyl 2.0L, 4 Cyl 2.2L, 4 Cyl 2.2L Flex, 4 Cyl 2.4L5 DOOR HIGH ROOF HATCHBACK, 5 DOOR HIGH ROOF HATCHBACK SS, 5 DOOR HIGH ROOF PANEL, 5 DOOR HIGH ROOF PANEL SS, 5 DOOR UPLEVEL HIGH ROOF HATCHBACK, 5 DOOR UPLEVEL HIGH ROOF PANEL
  • Customer Questions & Expert Answers

    Q:
    I'm wondering if this is complete and correct part for my vehicle.
    A:
    You can Select Your Vehicle to check if 15940309 fits your vehicle.
    Posted and answered by GM Parts Specialist Julian
    Q:
    How to remove the Coolant Reservoir on Chevrolet HHR? Posted by Falardeau S.
    A:
    To remove the coolant reservoir, start by draining the cooling system and disconnecting the battery. Then, unbolt the underhood fuse/relay box and move it aside. Disconnect the expansion tank return hose and air bleed hose, and remove the mounting fasteners for the expansion tank. Disconnect the Low Coolant Level sensor connector and remove the tank. Clean the tank thoroughly and inspect it for cracks, replacing it if necessary. To install the reservoir, simply reverse the removal steps. For models with a coolant reservoir, disconnect the battery and remove the air filter housing/engine cover assembly. Remove the reservoir mounting fastener and take out the reservoir. Installation is the reverse of removal.
    You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Jeremy / Jul 11, 2025

Genuine GM Part 15940309, the Right Choice

To ensure reliability, purchase GM part # 15940309 Reservoir. It is sometimes referred to as GM Coolant Reservoir. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts. This part fits specific Chevrolet HHR models.

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