Make sure this part fits

GMC 12618603 Knock Sensor

2007-2008 GMC Acadia

Customer Questions & Expert Answers (3)
12618603 GM Knock Sensor Product Photo 1 of 4
  • Part Description
    Sensor, Distributor
  • Replaces
    12566845
  • Manufacturer
    General Motors
Make sure this part fits
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  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine GMC
    Manufacturer Part Number12618603
    Part DescriptionKnock Sensor; Sensor, Distributor
    Item Dimensions2.6 x 2.6 x 2.2 inches
    Item Weight0.40 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces12566845
    ManufacturerGeneral Motors
    SKU12618603
    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
    2007-2008 GMC Acadia6 Cyl 3.6LSPORT UTILITY VEHICLE 2WD, SPORT UTILITY VEHICLE 4WD
  • 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 12618603 fits your vehicle.
    Posted and answered by GM Parts Specialist Julian
    Q:
    How is the installation process for the Knock Sensor in the V6 2008 Pontiac G6? Posted by Kris Z.
    A:
    As with the four-cylinder models, installation is the reverse of removal, with the mounting bolt tightened to the specified torque. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Raul / Aug 21, 2024
    Q:
    What should you do if you're replacing the Knock Sensor on the rear cylinder bank (Bank 1) for the 2008 Buick Enclave? Posted by Kysha A.
    A:
    You should remove the heat shield from the engine block. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Nicholas / Dec 17, 2025

Genuine GM Part 12618603, the Right Choice

To ensure reliability, purchase GM part # 12618603 Knock Sensor. It is sometimes referred to as GMC Knock Sensor. 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 GMC Acadia models.

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