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GMC 12648978 Intake Manifold

2011-2013 GMC Sierra

Customer Questions & Expert Answers (3)
12648978 GM Intake Manifold Product Photo 1 of 2
  • Part Description
    MANIFOLD, Engine Fuel Intake Manifold
  • Replaces
    12638660
  • Manufacturer
    General Motors
Make sure this part fits
$112.35 MSRP: $176.24
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Currently Unavailable

Due to manufacturer supply shortage, this item isn't currently available for ordering.

  • Related Parts
  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine GMC
    Manufacturer Part Number12648978
    Part DescriptionMANIFOLD, Engine Fuel Intake Manifold
    Other NamesManifold
    Item Dimensions9.2 x 18.7 x 13.1 inches
    Item Weight4.30 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces12638660
    ManufacturerGeneral Motors
    SKU12648978
    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
    2011-2013 GMC Sierra8 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 6'6" BOX 3/4 TON, CREW CAB 8' BOX 3/4 TON, EXTENDED CAB 1 TON, EXTENDED CAB 6'6" BOX 3/4 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 CHASSIS 1 TON 137.0, REGULAR CAB CHASSIS 1 TON 161.5
  • 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 12648978 fits your vehicle.
    Posted and answered by GM Parts Specialist Julian
    Q:
    How can the power steering pump bracket be accessed for the 2012 Chevrolet Silverado when the Intake Manifold is in place? Posted by Penny D.
    A:
    The power steering pump bracket can be accessed by loosening and removing the power steering pump bracket nut and bolts, and sliding the bracket forward. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Nicholas / Apr 03, 2026
    Q:
    What is the first step to remove the Intake Manifold for the 2012 GMC Sierra? Posted by Mariah Q.
    A:
    The first step is to disconnect the cable from the negative terminal of the battery. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Nicholas / May 15, 2025

Genuine GM Part 12648978, the Right Choice

To ensure reliability, purchase GM part # 12648978 Intake Manifold. It is sometimes referred to as GMC Intake Manifold. 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 Sierra models.

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