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GM 12686303 Exhaust Manifold

2007-2020 GM

Customer Questions & Expert Answers (3)
12686303 GM Exhaust Manifold Illustration 1 of 1
  • Part Description
    Manifold, Engine Exhaust Manifold
  • Replaces
    12610962
  • Manufacturer
    General Motors
Make sure this part fits
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  • Related Parts
  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine GM
    Manufacturer Part Number12686303
    Part DescriptionExhaust Manifold; Manifold, Engine Exhaust Manifold
    Item Dimensions7.0 x 21.8 x 11.5 inches
    Item Weight17.90 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces12610962
    ManufacturerGeneral Motors
    SKU12686303
    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
    2008-2020 Chevrolet Express8 Cyl 6.0L, 8 Cyl 6.0L Flex1 TON CARGO EXPRESS, 1 TON COMMERCIAL/RV CUTAWAY, 1 TON PASSENGER, 3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS
    2007-2019 Chevrolet Silverado8 Cyl 6.0L, 8 Cyl 6.0L Flex2500 CREW CAB STANDARD BOX, 2500 REGULAR (CAB ONLY), 2500 REGULAR CAB, 3500 CREW CAB LONG BOX, 3500 CREW CAB ONLY, 3500 CREW CAB STANDARD BOX, 3500 DOUBLE CAB LONG BOX, 3500 REGULAR (CAB ONLY), 3500 REGULAR CAB, CREW CAB 1 TON, CREW CAB 2500 LONG BOX, CREW CAB 6'6" BOX 3/4 TON, CREW CAB 8' BOX 3/4 TON, DOUBLE CAB 2500 LONG BOX, DOUBLE CAB 2500 STANDARD BOX, 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, REGULAR CAB 1 TON, REGULAR CAB 3/4 TON, REGULAR CAB CHASSIS 1 TON 137.0, REGULAR CAB CHASSIS 1 TON 161.5
    2016-2019, 2011-2014, 2008-2009 Chevrolet Suburban8 Cyl 6.0L, 8 Cyl 6.0L Flex3/4 TON, 3500 4 DOOR UTILITY
    2020, 2008-2018 GMC Savana8 Cyl 6.0L, 8 Cyl 6.0L Flex1 TON CARGO EXPRESS, 1 TON CARGO SAVANA, 1 TON COMMERCIAL/RV CUTAWAY, 1 TON PASSENGER, 3/4 TON CARGO SAVANA, 3/4 TON PASSENGER SAVANA
    2007-2019 GMC Sierra8 Cyl 6.0L, 8 Cyl 6.0L Flex1 TON CREW CAB, 2500 CREW CAB STANDARD BOX, 2500 REGULAR CAB, 2500 REGULAR CAB STANDARD BOX, 3500 CREW CAB LONG BOX, 3500 CREW CAB ONLY, 3500 CREW CAB STANDARD BOX, 3500 DOUBLE CAB LONG BOX, 3500 REGULAR CAB, CREW CAB 1 TON, CREW CAB 1 TON 119.0, CREW CAB 1 TON 137.0, CREW CAB 2500 LONG BOX, CREW CAB 6'6" BOX 3/4 TON, CREW CAB 8' BOX 3/4 TON, DOUBLE CAB 2500 LONG BOX, DOUBLE CAB 2500 STANDARD BOX, 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
    2011-2014, 2008-2009 GMC Yukon8 Cyl 6.0L, 8 Cyl 6.0L Flex3/4 TON, XL 3/4 TON
  • 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 12686303 fits your vehicle.
    Posted and answered by GM Parts Specialist Julian
    Q:
    How should the Exhaust Manifold be installed on the cylinder head for the 2013 GMC Sierra? Posted by Terrie E.
    A:
    Place the manifold on the cylinder head and install the mounting bolts finger-tight. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Bob / Jan 26, 2025
    Q:
    How should the mounting bolts for the Exhaust Manifold be secured on the 2011 Chevrolet Suburban? Posted by Karra B.
    A:
    Starting at the fourth thread, apply a 1/4-inch wide band of medium-strength thread-locking compound to the threads of the bolts. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Syed / Sep 03, 2024

Genuine GM Part 12686303, the Right Choice

To ensure reliability, purchase GM part # 12686303 Exhaust Manifold. It is sometimes referred to as GM Exhaust 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 Chevrolet Express, Silverado, Suburban models. It fits GMC Savana, Sierra, Yukon.

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