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Genuine GM 12639421
Valve Asm-EGR Cooler Bypass

Customer Questions & Answers (4)
GM 12639421 Valve Asm-EGR Cooler Bypass
  • Part Description VALVE, Emission Control System
  • Brand GM
$284.64
MSRP: $591.04
You Save: $306.40 (52%)

Vehicle Specific

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  • Product Specifications

    BrandGenuine General Motors
    Manufacturer Part Number12639421
    Part DescriptionVALVE, Emission Control System
    Other DescriptionValve Asm-EGR Cooler Bypass
    Other NamesBy-Pass Valve, EGR Valve
    Item Dimensions15.8 x 9.0 x 7.3 inches
    Item Weight11.10 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGenuine General Motors
    SKU12639421
    WarrantyThis genuine GM part is guaranteed by GM's factory warranty. For more information, please see our Warranty Page.
    Warning: California’s Proposition 65
  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    2011-2016 Chevrolet Silverado8 Cyl 6.6L Diesel2500 CREW CAB STANDARD BOX, 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, 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
    2011-2016 GMC Sierra8 Cyl 6.6L Diesel1 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

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Customer Questions & Answers

Q:
I'm trying to find out if 12639421 properly fits my vehicle.
By Customer
A:
Before you order, you need to Select Your Car to check if 12639421 works for you.
By Omar
GM Specialist
Q:
I wonder if this part works for my car with the 6.6 Liter Diesel.
By Customer
A:
This part works well with your car and your 6.6 Liter Diesel.
By Omar
GM Specialist
Q:
I need to assure that my 2011 GMC Sierra 3500 HD works fine with 12639421.
By Customer
A:
The part is made just for you. Thank you for asking.
By Omar
GM Specialist
Q:
I ordered this egr bypass cooler and forgot to order any required gaskets for mounting. I haven't located a parts diagram that I understand which gaskets to purchase. Any help would be appreciated.
By Customer with vehicle: 2013 Light Truck Silverado / Sierra / Cheyenne - 03, 43, 53 Bodystyle (4WD / AWD)
A:
Hello, There are three gaskets, 98065519 goes to the manifold, 98065520 goes to the cooler, and 98065523 goes to the egr pipe. If you are also needing hardware, 11611572 x4 is required to connect the valve to the cooler, and 11611136 x2 is required to connect the valve to the manifold.
By Omar
GM Specialist
6/9/2023
If you have any questions about this product, please don't hesitate to ask us. We will be happy to help you!

OEM GM 12639421 at AutoPartsPrime, Your Right Choice

  • The part number 12639421, Valve Asm-EGR Cooler Bypass, is designed to fit specific GM vehicles. Here, we provide you with parts specifications and vehicle fitment information for your convenience. This part fits specific Chevrolet Silverado. It fits GMC Sierra. All OEM GM parts are manufactured by GM and guaranteed by GM's factory warranty. You can find diagrams here for your parts lookup.
  • AutoPartsPrime is a fast-growing online store, and the online catalog we carry covers all your genuine automotive needs. From engine parts to body parts, we have a huge selection of GM parts. If you have friends who also own GM vehicles, don't forget to refer them to AutoPartsPrime. Also, if you have any questions or hesitation, let us help you.