How to replace the Heater Core on GMC C3500?

The first step to replace the Heater Core includes draining the coolant. The instrument panel storage compartment must be removed first followed by the necessary electrical connector disconnections and center floor air distribution duct extraction. Begin the procedure by pulling off the hinge pillar trim panels before removing the Blower Motor cover and motor unit together with the Steering Column. You should begin by removing the coolant recovery reservoir and heater hoses at the instrument panel before rolling back this panel. The screw at the evaporator pipe interior should be removed first when the heater case is held against the cowl followed by the 4 screws and 2 nuts securing the heater case to the cowl at the engine side before removing the heater case. If needed, ask for assistance. Extract the Heater Core by pulling it out of the retainer after removing 7 screws that protect the heater cover and taking off this cover from the heater case. Installation of the new Heater Core includes inserting it into the retainer which must be tightened with seven screws while replacing its seals before reinstalling the heater cover and checking the proper seal. Reinstall the heater case with assistance if required and fasten it using nuts and screws from the engine side of cowl according to 1.9 n.m (17 lb in), 2.8 n.m (25 lb in) and 11 n.m (97 lb in). The technician should first reconnect the heater hoses and coolant recovery reservoir and then roll forward the instrument panel before reinstalling the Steering Column, Blower Motor, Blower Motor cover, hinge pillar trim panels, center floor air distribution duct and reattaching all electrical connectors. After installing the instrument panel storage compartment it is necessary to add engine coolant while also conducting a leak inspection on the system.

OEM GMC C3500 Heater Core

HVAC Heater Core

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6 Heater Cores found

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GMC C3500 Heater Core Part Number: 89019173
$113.56 MSRP: $205.54
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Product Specifications
- Other Name: Core, Heater; HVAC Heater Core; Core, Heater Core
- Replaces: 52467018
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-2000 GMC C3500 | Sierra, Sierra SL, Sierra SLE, Sierra SLT, Sierra SLX | 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL, 8 Cyl 7.4 L GAS
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GMC C3500 Heater Core Part Number: 52452918
Product Specifications
- Other Name: Core, Heater; Core, Heater Core
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-1990 GMC C3500 | Sierra, Sierra SLE, Sierra SLX | 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 7.4 L GAS
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GMC C3500 Heater Core Part Number: 52467017
Product Specifications
- Other Name: Core, Heater; Core, Heater Core
- Replaces: 52461009
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-2000 GMC C3500 | Sierra, Sierra SL, Sierra SLE, Sierra SLT, Sierra SLX | 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL, 8 Cyl 7.4 L GAS
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GMC C3500 Heater Core Part Number: 3034749
Product Specifications
- Other Name: Core, Auxiliary Heater; Core, Heater Core
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1984-1986 GMC C3500 | Base, High Sierra, Sierra Classic | 6 Cyl 4.8 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 7.4 L GAS
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GMC C3500 Heater Core Part Number: 19131978
Product Specifications
- Other Name: Core, Heater Core; HVAC Heater Core
- Replaces: 03027247, 52479870, 3027247
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1984-1986 GMC C3500 | Base, High Sierra, Sierra Classic | 6 Cyl 4.8 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 7.4 L GAS
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GMC C3500 Heater Core Part Number: 19131974
Product Specifications
- Other Name: Core, Heater Core; HVAC Heater Core
- Replaces: 03027265, 3027265, 52479865
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1984-1986 GMC C3500 | Base, High Sierra, Sierra Classic | 6 Cyl 4.8 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 7.4 L GAS

GMC C3500 Heater Core

Want to cut long-term maintenance and repair costs? Choose OEM Heater Core. Those parts deliver top durability you can trust. On our site, you'll find a huge catalog of genuine GMC C3500 parts. Prices are unbeatable, so you can keep more in your pocket. Every OEM GMC C3500 Heater Core includes a manufacturer's warranty. You can also get an easy return policy that keeps buying risk free. Fast delivery, get your car on the road quickly. It's simple to search, compare, and order. Stop guessing about quality or fit. Order today and save with parts that last.

The GMC C3500 Heater Core is one of the components of the climate control in the vehicles belonging to the GMC C3500 series, famous for its durability and efficiency. This Heater Core is optimized to transfer unwanted engine heat to warm the cab and climate the car to cater for different weather conditions. Looking like a scaled down radiator the GMC C3500 Heater Core employs a combination of water and anti-freeze as the fluid. Being compatible with several C3500 models such as the standard and the crew chassis cabs that were manufactured starting from 1991 shows that it is rather versatile. Heater Core is also useful in maintaining vehicle efficiency by regulating the temperature of the cabin especially in the air conditioned cars where it also contributes in dehumidification of the cabin's air. The GMC C3500 Heater Core is noteworthy for its sophisticated temperature control mechanism and option of goodies like electromechanical actuators and even thermistors. Like with any other equipment, problems like clogging, leakage, and corrosion are nevertheless fairly usual in the Heater Core but their possibility is reduced with the design of the equipment to ensure it can serve long term. The GMC C3500 Heater Core has many positive effects in the automotive market as it is built quite heavily and can be easily fitted in the car without interfering with all the facilitating systems, thus making it a perfect heater core for C3500 owners who want to keep their vehicle running efficiently and toasty. All in all, the GMC C3500 Heater Core is an example of how GMC strives to improve on products and advance auto manufacturing.

GMC C3500 Heater Core Parts and Q&A

Heater Core
89019173
Q: How to replace the Heater Core on GMC C3500?
A:
The first step to replace the Heater Core includes draining the coolant. The instrument panel storage compartment must be removed first followed by the necessary electrical connector disconnections and center floor air distribution duct extraction. Begin the procedure by pulling off the hinge pillar trim panels before removing the Blower Motor cover and motor unit together with the Steering Column. You should begin by removing the coolant recovery reservoir and heater hoses at the instrument panel before rolling back this panel. The screw at the evaporator pipe interior should be removed first when the heater case is held against the cowl followed by the 4 screws and 2 nuts securing the heater case to the cowl at the engine side before removing the heater case. If needed, ask for assistance. Extract the Heater Core by pulling it out of the retainer after removing 7 screws that protect the heater cover and taking off this cover from the heater case. Installation of the new Heater Core includes inserting it into the retainer which must be tightened with seven screws while replacing its seals before reinstalling the heater cover and checking the proper seal. Reinstall the heater case with assistance if required and fasten it using nuts and screws from the engine side of cowl according to 1.9 n.m (17 lb in), 2.8 n.m (25 lb in) and 11 n.m (97 lb in). The technician should first reconnect the heater hoses and coolant recovery reservoir and then roll forward the instrument panel before reinstalling the Steering Column, Blower Motor, Blower Motor cover, hinge pillar trim panels, center floor air distribution duct and reattaching all electrical connectors. After installing the instrument panel storage compartment it is necessary to add engine coolant while also conducting a leak inspection on the system.