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GM 12558112 Cylinder Head Assembly

1996-1999 GM

Customer Questions & Expert Answers (9)
GM 12558112 Cylinder Head Assembly
  • Part Description
    Head Assembly, Cyl ; Head, Engine Cylinder
  • Manufacturer
    General Motors
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  • Related Parts
  • Product Specifications
  • Vehicle Fitment
  • Customer Questions & Expert Answers
  • Product Specifications

    BrandGenuine GM
    Manufacturer Part Number12558112
    Part DescriptionHead Assembly, Cyl ; Head, Engine Cylinder
    Other NamesCylinder Head
    Item Dimensions21.4 x 8.8 x 6.8 inches
    Item Weight36.40 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU12558112
    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
    1996-1999 Chevrolet Astro6 Cyl 4.3LVAN ASTRO
    1996-1999 Chevrolet Blazer6 Cyl 4.3L2 DOOR, 4 DOOR
    1996-1999 Chevrolet Express6 Cyl 4.3L1 TON CARGO EXPRESS, 1 TON COMMERCIAL/RECREATIONAL VEHICLE EXPRESS, 1 TON PASSENGER, 3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS
    1996-1999 Chevrolet P306 Cyl 4.3LCHASSIS 1 TON MOTOR HOME HEAVY DUTY, CHASSIS DELIVERY, CHASSIS DELIVERY CUTAWAY, CHASSIS MOTOR HOME, CHASSIS MOTOR HOME CUTAWAY, MOTOR HOME CHASSIS 1 TON
    1996-1999 Chevrolet S106 Cyl 4.3LPICKUP
    1996-1999 GMC Jimmy6 Cyl 4.3L2 DOOR, 4 DOOR
    1996-1999 GMC Safari6 Cyl 4.3LVAN SAFARI
    1996-1999 GMC Savana6 Cyl 4.3L1 TON CARGO EXPRESS, 1 TON CARGO SAVANA, 1 TON COMMERCIAL/RECREATIONAL VEHICLE EXPRESS, 1 TON COMMERCIAL/RECREATIONAL VEHICLE SAVANA, 1 TON PASSENGER, 3/4 TON CARGO EXPRESS, 3/4 TON CARGO SAVANA, 3/4 TON PASSENGER EXPRESS, 3/4 TON PASSENGER SAVANA
    1996-1999 GMC Sonoma6 Cyl 4.3LPICKUP
    1996-1999 Oldsmobile Bravada6 Cyl 4.3LBRAVADA
  • Customer Questions & Expert Answers

    Q:
    I am wonder if this is complete and correct part for my vehicle. Posted by GMPartsGiant Specialist
    A:
    You can Select Your Vehicle to check if 12558112 fits your vehicle.
    Posted by GMPartsGiant Specialist
    Q:
    What is the next step after removing and storing the valves and components for the 1999 Chevrolet Astro? Posted by Customer
    A:
    After removing and storing the valves and components, thoroughly clean and inspect the head, completing engine disassembly procedures if a complete overhaul is being performed before starting the cleaning and inspection process.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    What should be done if the valve spring height exceeds specifications for the 1996 Chevrolet Blazer? Posted by Customer
    A:
    If the height exceeds specifications, shims can be added under the springs to correct it.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    What should be done after the installation of the cylinder heads for the 1996 Chevrolet Express? Posted by Customer
    A:
    The remaining installation steps follow the reverse order of removal. Finally, change the engine oil and filter, then start the engine and check for oil and coolant leaks.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    What should be checked on the block and head mating surfaces for the 1997 Chevrolet Express? Posted by Customer
    A:
    Check the block and head mating surfaces for nicks or scratches, using emery cloth for slight damage and considering machining for excessive damage.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    What are the initial steps to remove the cylinder head for the 1996 Chevrolet S10? Posted by Customer
    A:
    The initial steps to remove the cylinder head are to disconnect the negative battery cable and drain the cooling system.
    Posted by GMPartsGiant Specialist
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    Q:
    What should be done with the valves during the cleaning process for the 1997 GMC Jimmy? Posted by Customer
    A:
    Heavy deposits should be scraped off the valves, and a motorized wire brush should be used for the valve heads and stems, ensuring not to mix them up.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    What should be done after all valves have been removed for the 1999 GMC Jimmy? Posted by Customer
    A:
    After all valves have been removed and stored, the head should be thoroughly cleaned and inspected, with engine disassembly completed if a full overhaul is being performed before starting the cleaning and inspection process.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    What should be done before removing the cylinder heads for the 1998 GMC Sonoma? Posted by Customer
    A:
    Ensure the engine is completely cool and drain the cooling system.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    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 12558112, the Right Choice

To ensure reliability, purchase GM part # 12558112 Cylinder Head Assembly. It is sometimes referred to as GM Cylinder Head. 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 Blazer, P30, S10 models. It fits GMC Safari, Savana, Sonoma. It also fits Oldsmobile Bravada.

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