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GMC 20904439 Relay Assembly, Trailer Brake Control

2007-2014 GMC

Customer Questions & Expert Answers (8)
GM 20904439 Relay Assembly, Trailer Brake Control
GM 20904439 Relay Assembly, Trailer Brake Control
GM 20904439 Relay Assembly, Trailer Brake Control
GM 20904439 Relay Assembly, Trailer Brake Control
GM 20904439 Relay Assembly, Trailer Brake Control
GM 20904439 Relay Assembly, Trailer Brake Control
GM 20904439 Relay Assembly, Trailer Brake Control
GM 20904439 Relay Assembly, Trailer Brake Control
GM 20904439 Relay Assembly, Trailer Brake Control
GM 20904439 Relay Assembly, Trailer Brake Control
  • Part Description
    RELAY, Electronic Brake Control
  • Replaces
    25848909, 25837945
  • Manufacturer
    General Motors
Make sure this part fits
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  • Related Parts
  • Product Specifications
  • Vehicle Fitment
  • Customer Questions & Expert Answers

  • Related Parts

    Shop for related parts for your vehicle

  • Product Specifications

    BrandGenuine GMC
    Manufacturer Part Number20904439
    Part DescriptionRELAY, Electronic Brake Control
    Other NamesRelay
    Item Dimensions4.6 x 3.1 x 1.2 inches
    Item Weight0.50 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces25848909, 25837945
    ManufacturerGeneral Motors
    SKU20904439
    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
    2007-2014 GMC Sierra6 Cyl 4.3L, 8 Cyl 4.8L, 8 Cyl 4.8L Flex, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L, 8 Cyl 6.0L Flex, 8 Cyl 6.2L, 8 Cyl 6.2L Flex, 8 Cyl 6.6L Diesel1 TON CREW CAB, CREW CAB 1 TON, CREW CAB 1 TON 119.0, CREW CAB 1 TON 137.0, CREW CAB 1/2 TON, CREW CAB 6'6" BOX 3/4 TON, CREW CAB 8' BOX 3/4 TON, EXTENDED CAB 1 TON, EXTENDED CAB 5'8" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 3/4 TON, EXTENDED CAB 8' BOX 1/2 TON, EXTENDED CAB 8' BOX 3/4 TON, EXTENDED CAB CHASSIS 1 TON 161.5, EXTENDED CREW CAB 1 TON 161.5, REGULAR CAB 1 TON, REGULAR CAB 3/4 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON, REGULAR CAB CHASSIS 1 TON 137.0, REGULAR CAB CHASSIS 1 TON 161.5
    2009-2014 GMC Yukon8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L, 8 Cyl 6.0L Flex, 8 Cyl 6.2L, 8 Cyl 6.2L Flex1/2 TON, 3/4 TON, XL 3/4 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE

  • Customer Questions & Expert Answers

    Q:
    I would like to confirm if this is the correct part number for my vehicle. Please advise. Thank you. Posted by GMPartsGiant Specialist
    A:
    You can Select Your Vehicle to check if 20904439 fits your vehicle.
    Posted by GMPartsGiant Specialist
    Q:
    What are relays and how are they used in Chevrolet Avalanche,Silverado,Suburban,Tahoe,GMC Sierra,Yukon,Yukon Denali and Yukon XL? Posted by Customer
    A:
    Relays are used in several electrical circuits in vehicles to transmit electrical signals to components. They use a low-current control circuit to open and close a high-current power circuit. If a relay is defective, the corresponding component will not function properly. Most relays are located in the engine compartment fuse/relay box, with some specialized relays located above the interior fuse box in the dash. To test a suspected faulty relay, it can be removed and tested using an ohmmeter to check continuity through the relay control coil and power circuit terminals. The terminals of ISO relays are numbered to indicate their usual circuit connections and functions. If the relay fails any of the tests, it must be replaced as a unit.
    Posted by GMPartsGiant Specialist
    Q:
    Where are most relays located in the 2009 Chevrolet Silverado? Posted by Customer
    A:
    Most relays are located in the engine compartment fuse/relay box, with some specialized relays located above the interior fuse box in the dash.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Relay
    Q:
    How do relays work for the 2013 Chevrolet Tahoe? Posted by Customer
    A:
    Relays use a low-current control circuit to open and close a high-current power circuit.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Relay
    Q:
    Where are most relays located in the 2011 GMC Yukon? Posted by Customer
    A:
    Most relays are located in the engine compartment fuse/relay box, with some specialized relays located above the interior fuse box in the dash.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Relay
    Q:
    How can a suspected faulty relay be tested for the 2007 GMC Sierra? Posted by Customer
    A:
    A suspected faulty relay can be removed and tested using an ohmmeter to check continuity through the relay control coil and power circuit terminals.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Relay
    Q:
    Does this relay need to be programmed? Posted by Customer
    A:
    No, this relay does not need to be programmed
    Posted by GMPartsGiant Specialist 23/8/2020
    Q:
    Where can this relay be found in a Suburban? Posted by Customer
    A:
    In a 2011 Suburban this relay is found on the framerail on both the driver rear and passenger rear side
    Posted by GMPartsGiant Specialist 22/8/2020
    If you have any questions about this product, please don't hesitate to ask us. We will be happy to help you!

Genuine GM Part 20904439, the Right Choice

Your vehicle deserves only genuine OEM GM parts and accessories. To ensure reliability, purchase GM part # 20904439 Relay Assembly, Trailer Brake Control. It is sometimes referred to as GMC Relay. Our GM parts and accessories are expedited directly from authorized GM dealers strategically located all across the U.S. and are backed by the manufacturer's 12 month, 12,000 mile warranty. OEM GM parts are the best for restoring your vehicle to factory condition performance. This part fits specific GMC Sierra, Yukon models.

Affordable, reliable and built to last, GM part # 20904439 Relay Assembly, Trailer Brake Control stands out as the smart option. GMPartsGiant.com is your prime online source with the biggest and best selection of genuine GM parts and accessories at giant discounted prices. We have the OEM GM parts and accessories you need at the wholesale prices. GMPartsGiant.com has you covered no matter what type of GM vehicle you drive. For detailed GMC parts information, click here.

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