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GMC 12558112 Cylinder Head Assembly

1996-1999 GMC

Customer Questions & Expert Answers (28)
GM 12558112 Cylinder Head Assembly
GM 12558112 Cylinder Head Assembly
  • Part Description
    Head Assembly, Cyl ; Head, Engine Cylinder
  • Manufacturer
    General Motors
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$621.53 MSRP: $803.53
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  • Related Parts
  • Product Specifications
  • Vehicle Fitment
  • Customer Questions & Expert Answers

  • Related Parts

    Shop for related parts for your vehicle

  • Product Specifications

    BrandGenuine GMC
    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 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

  • 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 should be done with the power steering pump bracket for the 2004 Chevrolet Astro? Posted by Customer
    A:
    Remove the power steering pump bracket from the cylinder head.
    Posted by GMPartsGiant Specialist
    Q:
    What is the recommended method for cleaning valve components for the 1987 Chevrolet Astro? Posted by Customer
    A:
    Clean all valve springs, shields, keepers, and retainers one valve at a time to avoid mixing parts, and scrape off heavy deposits from the valves before using a motorized wire brush on the valve heads and stems.
    Posted by GMPartsGiant Specialist
    Q:
    What should be done to the head before beginning reassembly for the 2003 Chevrolet Astro? Posted by Customer
    A:
    Regardless of whether a head was sent to an automotive repair shop for valve servicing, ensure it is clean before beginning reassembly.
    Posted by GMPartsGiant Specialist
    Q:
    What should be done if the head is stuck for the 2000 Chevrolet Astro? Posted by Customer
    A:
    Lift the head off the engine, prying only at the overhang on the thermostat end if it is stuck, and place it on a block of wood to prevent damage.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    What should be done after removing all the valves for the 1990 Chevrolet Astro? Posted by Customer
    A:
    Repeat the removal process for the remaining valves, keeping all parts organized for reinstallation.
    Posted by GMPartsGiant Specialist
    Q:
    What should be done after all valves have been removed for the 1996 Chevrolet Blazer? 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
    Q:
    What should be done with the cylinder head bolt holes for the 1999 Chevrolet Blazer? Posted by Customer
    A:
    Chase the threads in the cylinder head bolt holes and coat the threads with a non-hardening sealant.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    What should be done before beginning the reassembly of a head sent for valve servicing for the 2000 Chevrolet Blazer? Posted by Customer
    A:
    Ensure the head is clean before beginning reassembly.
    Posted by GMPartsGiant Specialist
    Q:
    What are the initial steps to remove the cylinder head for the 2000 Chevrolet Blazer? 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
    See expert answers on similar Cylinder Head
    Q:
    What measurements should be taken regarding the valve guides for the 1995 Chevrolet Blazer? Posted by Customer
    A:
    Measure the inside diameters of the valve guides and record the measurements to compute valve stem-to-guide clearances, determining if reconditioning or replacement is necessary.
    Posted by GMPartsGiant Specialist
    Q:
    What should be done after installing the engine valley cover for the 2016 Chevrolet Express? Posted by Customer
    A:
    Install the engine valley cover with new knock sensor O-rings, tightening the bolts to the torque, and install the coolant bleed pipe using new gaskets at each joint, tightening the bolts to the torque.
    Posted by GMPartsGiant Specialist
    Q:
    How should the power steering pump and bracket be managed during the process for the 2009 Chevrolet Express? Posted by Customer
    A:
    Support the power steering pump and bracket out of the way, ensuring the bracket does not contact the radiator.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    What should be done after all valves have been removed for the 2004 Chevrolet S10? 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
    Q:
    How is a valve spring compressor used in the disassembly process for the 2001 GMC Jimmy? Posted by Customer
    A:
    A valve spring compressor is used to compress the spring on the first valve, allowing for the removal of the keepers, retainer, shield, springs, valve guide seal, spring seat, and the valve itself.
    Posted by GMPartsGiant Specialist
    Q:
    How should the first valve be lubricated and installed for the 1995 GMC Jimmy? Posted by Customer
    A:
    Apply engine assembly lube or clean engine oil to the valve stem before installing the first valve.
    Posted by GMPartsGiant Specialist
    Q:
    What should be done for the remaining valves for the 1994 GMC Sonoma? Posted by Customer
    A:
    Repeat the procedure for the remaining valves, ensuring all components are returned to their original locations without mixing them up.
    Posted by GMPartsGiant Specialist
    Q:
    How should the cylinder heads be installed for the 2003 Chevrolet S10? Posted by Customer
    A:
    Place the cylinder heads and install bolts in their original locations, tightening in several steps.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    What is the availability of new and rebuilt cylinder heads for engines for the 1996 GMC Sonoma? Posted by Customer
    A:
    New and rebuilt cylinder heads are commonly available for most engines at dealerships and auto parts stores, making it more practical and economical for home mechanics to purchase a replacement head rather than disassembling, inspecting, and reconditioning the original.
    Posted by GMPartsGiant Specialist
    Q:
    What is the procedure for cleaning the cylinder head for the 1995 GMC Jimmy? Posted by Customer
    A:
    The cylinder head should be cleaned with solvent and dried thoroughly, using compressed air to expedite the process. Decarbonizing chemicals may be used but should be handled with caution.
    Posted by GMPartsGiant Specialist
    Q:
    How can the cylinder head be safely lifted off the engine for the 2000 GMC Jimmy? Posted by Customer
    A:
    To safely lift the cylinder head off the engine, you should outline the cylinders and bolt pattern on cardboard and mark the front of the engine. Then, loosen the head mounting bolts in 1/4-turn increments and store them in the cardboard holder. Carefully lift the head off the engine, and if it is stuck, only pry it at the overhang on the thermostat end. Place the head on a block of wood.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    What should be done after installing the cylinder head for the 1998 GMC Sonoma? Posted by Customer
    A:
    After installing the cylinder head, you should finish by changing the oil and filter, adding coolant, running the engine, and checking for leaks.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    How should the cylinder head bolts be loosened for the 2002 GMC Sonoma? Posted by Customer
    A:
    Loosen the cylinder head bolts in 1/4-turn increments.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Cylinder Head
    Q:
    How should the valve seats be examined for the 1998 GMC Sonoma? Posted by Customer
    A:
    The valve seats should be examined for pitting, cracking, or burning, which may require professional service.
    Posted by GMPartsGiant Specialist
    Q:
    What should be checked on the rocker arms and pushrods for the 2001 Chevrolet S10? Posted by Customer
    A:
    Check the rocker arm faces for wear, inspect pushrod ends for scuffing, and roll them on a flat surface to check for bending.
    Posted by GMPartsGiant Specialist
    Q:
    How can the installed valve spring height be checked for the 1994 Chevrolet S10? Posted by Customer
    A:
    Check the installed valve spring height with a ruler graduated in 1/32-inch increments or a dial caliper, measuring from the top of each spring seat or shim(s) to the top of the oil shield or the bottom of the retainer.
    Posted by GMPartsGiant Specialist
    Q:
    What are the initial steps to remove the cylinder head for the 2003 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
    See expert answers on similar Cylinder Head
    Q:
    What should be done with the cylinder head bolt holes for the 1997 GMC Jimmy? Posted by Customer
    A:
    Chase the threads in the cylinder head bolt holes and coat the threads with a non-hardening sealant.
    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 GMC 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 GMC Safari, Savana, Sonoma models.

GMPartsGiant.com is a leading supplier of genuine GM parts and accessories such as GM 12558112 Cylinder Head Assembly. You're certainly in the right place if you're searching for the great cost-effective OEM GM parts. Look no further than our vast inventory of genuine GM parts offered at unbeatable online prices, all of which are backed by the manufacturer's warranty. Not to forget, our hassle-free return policy and quick delivery service ensure a smooth shopping experience for you. For detailed GMC parts information, click here.

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