Make sure this part fits

GM 19258989
Heater Core

2003-2007 GM

Customer Questions & Expert Answers (18)
GM 19258989 Heater Core
GM 19258989 Heater Core
  • Part Description
    Core, Heater Core
  • Replaces
    88986627
  • Manufacturer
    General Motors
Make sure this part fits
$154.99 MSRP: $278.00
You Save: $123.01 (45%)
Ships in 1-2 Business Days
1
ADD TO CART
  • Related Parts
  • Product Specifications
  • Vehicle Fitment
  • Customer Questions & Expert Answers
  • Product Specifications

    BrandGenuine GM
    Manufacturer Part Number19258989
    Part DescriptionCore, Heater Core
    Item Dimensions14.1 x 13.8 x 7.1 inches
    Item Weight2.90 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces88986627
    ManufacturerGeneral Motors
    SKU19258989
    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 Trim Engine
    2003-2006 Cadillac EscaladeBase8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
    2003-2006 Cadillac Escalade ESVBase8 Cyl 6.0 L GAS
    2003-2006 Cadillac Escalade EXTBase8 Cyl 6.0 L GAS
    2003-2006 Chevrolet Avalanche 1500Base, LS, LT, North Face, On Road Edition, WBH, Z66, Z718 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS
    2003-2006 Chevrolet Avalanche 2500Base, LS, LT8 Cyl 8.1 L GAS
    2003-2007 Chevrolet Silverado 1500Base, Hybrid, LS, LT, LTZ, SS, WT, Z71 Off-Road6 Cyl 4.3 L GAS, 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
    2007 Chevrolet Silverado 1500 ClassicHybrid, LS, LT, SS, WT6 Cyl 4.3 L GAS, 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
    2005-2006, 2003 Chevrolet Silverado 1500 HDBase, LS, LT8 Cyl 6.0 L GAS
    2007 Chevrolet Silverado 1500 HD ClassicLT8 Cyl 6.0 L GAS
    2003-2004 Chevrolet Silverado 2500Base, LS, LT, WT8 Cyl 6.0 L GAS
    View More
  • Customer Questions & Expert Answers

    Q:
    Is this 19258989 designed for my car? Posted by ChevyPartsGiant Specialist
    A:
    Please Select Your Vehicle model to see if part number 19258989 is suitable before ordering.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the heater core in a Visteon system on Cadillac Escalade? Posted by Customer
    A:
    Replacing the heater core in Visteon requires beginning with HVAC module assembly removal. Starting with the heater core cover you should detach its screws before extracting the cover away from the HVAC module assembly . The technician needs to detach the heater core cowl gasket from the heater core before extracting the heater core from the HVAC module assembly. The heater core insertion into the HVAC module assembly should be the first installation step followed by heater core cowl gasket installation and heater core cover installation onto HVAC module assembly. Fasten the heater core cover by using the screws while applying 2 Nm (18 lb in) torque and reattach the HVAC module assembly.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Heater Core (Delphi) on Cadillac Escalade EXT? Posted by Customer
    A:
    A replacement of the heater core (Delphi) requires disassembly of the HVAC module assembly. You must first remove the screws from the heater core cover and extract it away from the HVAC module assembly. The technician should then remove the heater core cowl gasket from the heater core before taking out the heater core from the HVAC module assembly. Starting with heater core installation requires placing it inside the HVAC module assembly then following with the heater core cowl gasket installation onto the heater core . After installing the heater core cover correctly place it onto the HVAC module assembly. Select appropriate fasteners which must be installed to their proper positions and verify that new fasteners provide the correct part number for their designated application. The service procedure indicates all fasteners requiring replacement as well as those needing thread locking compound or sealant. No paints and lubricants should be used on fasteners and joint surfaces because these substances alter torque and clamping force and potentially harm the fastener structure. The correct tightening sequence along with specifications must be followed so that systems and parts remain unharmed. Secure the screws on the heater core cover before tightening them to 2 Nm (18 lb in) and reinstall the HVAC module assembly.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the heater core in a Delphi system on Chevrolet Avalanche 1500? Posted by Customer
    A:
    The Delphi heater core replacement process should begin with HVAC module assembly extraction. First detach the screws that hold the heater core cover before removing the cover away from the HVAC module assembly. You should detach the heater core cowl gasket from the heater core and then extract the heater core from the HVAC module assembly. The procedure starts with heater core placement into the HVAC module assembly before applying the heater core cowl gasket to the heater core. Fasten the heater core cover to the HVAC module assembly while using the screws that require a torque of 2 Nm (18 lb in). Install the HVAC module assembly as the last step of the replacement.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Heater Core (Visteon) on Chevrolet Silverado 1500? Posted by Customer
    A:
    The first step is to detach both the HVAC module assembly after which you must remove the screws from the heater core cover. You should disconnect the heater core cover from the HVAC module assembly and remove the heater core cowl gasket that exists between the heater core. The heater core extraction will take place from the HVAC module assembly. Begin heater core installation by fitting it back into the HVAC module assembly followed by attaching the heater core cowl gasket to the HVAC module assembly after that add the heater core cover onto the HVAC module assembly. Follow the procedure to bolt the heater core cover to the HVAC module assembly and tighten its screws to 2 N.m (18 lb in). Reinstall the HVAC module assembly as the last step.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Heater Core (Delphi) on Chevrolet Silverado 3500? Posted by Customer
    A:
    The Heater Core (Delphi) substitution process starts by uninstalling the HVAC module assembly while detaching the screws on the heater core cover. Proceed to detach the heater core cover from the HVAC module assembly after removing the heater core cowl gasket from the heater core . Remove the heater core by extracting the component from the HVAC module assembly. Begin the install process by placing the heater core inside the HVAC module assembly and then apply the heater core cowl gasket onto the heater core surface. Secure the heater core cover to the HVAC module assembly and fasten its screws into the heater core cover while tightening them to 2 N.m (18 lb in). The installation of the HVAC module assembly should be completed last.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the heater core in the auxiliary HVAC module on Chevrolet Suburban 1500? Posted by Customer
    A:
    The beginning of heater core replacement needs users to extract the auxiliary HVAC module from its vehicle position while also removing the air temperature actuator from within the module. Begin by removing the metal stud at the underside of the auxiliary HVAC module by its position between heater core inlet and outlet pipes. Then safely detach the heater core pipe gasket from module case followed by removing its heater core pipe retainer. Finish the installation by taking out the lower cover of the auxiliary HVAC module followed by the heater core clamp before removing the heater core from the auxiliary HVAC module. The heater core installation process starts by placing the core into the auxiliary HVAC module before screwing on the cover clamp. Begin with reinstallation of the auxiliary HVAC module lower cover followed by installation of the heater core pipe retainer along with the gasket. We must first secure the stud which connects heater core inlets and outlets on the lower part of the rear HVAC module then reattach the air temperature actuator before putting back the auxiliary HVAC module assembly into the vehicle.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Heater Core (Visteon) on Chevrolet Silverado 3500 Classic? Posted by Customer
    A:
    You must take out the HVAC module assembly as the first step for heater core (Visteon) replacement. The procedure requires removing screws from the heater core cover before taking away this cover from the HVAC module assembly. Place the heater core back into the HVAC module assembly while you also install the heater core cowl gasket to rest on the heater core . Reinstall the heater core by placing it first into the HVAC module assembly before attaching the heater core cowl gasket onto the HVAC module assembly. Install the heater core cover onto the HVAC module assembly while fastening its screws until you reach a 2 N.m (18 lb in) torque. Reinstall the HVAC module assembly in the last stage.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Heater Core on Chevrolet Silverado 1500 Classic? Posted by Customer
    A:
    The replacement process requires removing the heater/vent module before you can take out the heater core cover screws, heater core cover and finally the heater core. Before installing the heater core you must position the new piece followed by heater core cover placement according to the fastener notice then secure the heater core cover screws at 1.6 N.m (14 lb in) torque. Finally, reinstall the heater/vent module.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Heater Core (Visteon) on GMC Yukon? Posted by Customer
    A:
    The repair of the Visteon heater core begins by removing the HVAC module assembly followed by removing screws from the heater core cover until the assembly becomes loose from the module. The procedure requires removal of the heater core cowl gasket from the heater core so you can extract the heater core out from the HVAC module assembly . The heater core installation requires insertion into the HVAC module assembly first and then addition of the heater core cowl gasket followed by reconnection of the heater core cover to the HVAC module assembly . The repair requires using appropriate fasteners which need to be installed in their exact positions since alternative fasteners must be of the proper part number for intended usage. When the service procedure requires new fasteners or thread locking materials or sealants, it will specify their requirements. Paints alongside lubricants and corrosion inhibitors must be avoided on both fasteners and joint surfaces since these materials can result in damage to the fastener through changes in torque and clamping force. The correct tightening sequence and specifications should be followed to stop damage from occurring to parts and systems. Install the screws onto the heater core cover while tightening them to 2 Nm (18 lb in). Reinstall the HVAC module assembly afterward.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the auxiliary heater core on GMC Yukon? Posted by Customer
    A:
    After pulling out the auxiliary HVAC module from the vehicle one should disconnect the air temperature actuator from its position on the module. The heater core cover must be removed first and the heater core shall be withdrawn from its position in the module. The procedure starts with positioning the new heater core inside the auxiliary HVAC module while reinstalling the heater core cover and the air temperature actuator. Reinstall the auxiliary HVAC module assembly into the car as the final procedure.
    Posted by ChevyPartsGiant Specialist
    Q:
    How should the heater core cover screws be secured for the 2004 Chevrolet Silverado 2500? Posted by Customer
    A:
    Tighten them to 1.6 N.m (14 lb in).
    Posted by ChevyPartsGiant Specialist
    See expert answers on similar Heater Core
    Q:
    What should be done after removing the HVAC module assembly for the 2004 GMC Sierra 1500? Posted by Customer
    A:
    Take out the screws from the heater core cover and then remove the heater core cover from the HVAC module assembly.
    Posted by ChevyPartsGiant Specialist
    See expert answers on similar Heater Core
    Q:
    What is the next step after removing the heater core cover for the 2005 GMC Sierra 1500? Posted by Customer
    A:
    Detach the heater core cowl gasket from the heater core and remove the heater core from the HVAC module assembly.
    Posted by ChevyPartsGiant Specialist
    See expert answers on similar Heater Core
    Q:
    What is the final step after installing the heater core cover for the 2006 GMC Sierra 1500? Posted by Customer
    A:
    Reinstall the heater/vent module.
    Posted by ChevyPartsGiant Specialist
    See expert answers on similar Heater Core
    Q:
    What should be done after removing the auxiliary HVAC module for the 2004 GMC Yukon XL 2500? Posted by Customer
    A:
    Detach the air temperature actuator from the module.
    Posted by ChevyPartsGiant Specialist
    See expert answers on similar Heater Core
    Q:
    What should be done after removing the HVAC module assembly for the 2007 GMC Sierra 1500 Classic? Posted by Customer
    A:
    Take out the screws from the heater core cover and then remove the heater core cover from the HVAC module assembly.
    Posted by ChevyPartsGiant Specialist
    See expert answers on similar Heater Core
    Q:
    How do you begin the installation of the heater core for the 2005 GMC Sierra 3500? Posted by Customer
    A:
    Place the heater core back into the HVAC module assembly.
    Posted by ChevyPartsGiant Specialist
    See expert answers on similar Heater Core
    If you have any questions about this product, please don't hesitate to ask us. We will be happy to help you!

OEM GM 19258989, Excellent Performance and Perfect Fitment

To ensure reliability, purchase GM part # 19258989 Heater Core. It is sometimes referred to as GM Heater Core. Choosing OEM parts is the optimal decision for guaranteeing superior quality and perfect performance. These components undergo stringent quality checks and are carefully constructed to comply with GM's factory specifications, ensuring a smooth installation process.

ChevyPartsGiant.com is a leading supplier of genuine GM parts such as GM 19258989 Heater Core. Our website boasts an extensive inventory of OEM GM parts, available at highly competitive prices in the market. Should you require any new genuine GM parts, rest assured we will deliver them swiftly and efficiently to your doorstep. Furthermore, all our parts come with the assurance of a manufacturer's warranty. For detailed Chevy parts information, click here.
Choose ChevyPartsGiant for discounted prices, exceptional service and fast delivery