Designed to supply heat for the cab and defroster, the Four Seasons heater core 92023 is an aluminum heat exchanger for the front HVAC position. Hot engine coolant passes through the core so the blower can move warm air into the cabin. It fits many vehicles, among them the 2003-2006 Chevrolet Silverado 1500, 2003-2006 Chevrolet Silverado 2500 and 2003-2006 GMC Sierra 1500. See the "Vehicles it fits" section for the full list.
Four Seasons draws on more than 50 years of mobile A/C experience, and it engineers and tests its products before they reach the shelf.
- Aluminum construction: the core is made of aluminum.
- Heavy-duty construction: built for product durability.
- O.E. fit, form and function: quality engineering intended to match the original part's fit, form and function.
- Independently tested: outside testing for proven quality and performance.
As a Four Seasons HVAC heater core, it works inside the heater housing. Engine coolant flows through the core while the blower pushes air across it, which supplies warm air for the cabin and for windshield defrost. If the original heater core in your 2003-2006 GMC Sierra 1500 has failed, this aluminum unit is a direct-fit replacement for the listed applications.
Signs a heater core may need replacing include weak or no cabin heat, a sweet coolant smell inside the vehicle, a greasy film fogging the windshield, damp floor carpet and unexplained coolant loss. Other faults can cause these symptoms too, so diagnose the heating and cooling system before you replace the core.
Interchange: 1562827 · 88986627 · 9010463 · 551023 · 99374 · 19258989 · ACD1562827 · 99079 · 399992 · 1812342 · HT400166C
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
1562827, 88986627, 9010463, 551023, 92023, 99374, 19258989, ACD1562827, 99079, 399992, 1812342, HT400166C
Frequently Asked Questions
What does the 92023 heater core do?
It is a heat exchanger in the front HVAC housing. Hot engine coolant flows through it, and the blower moves air across it to supply warm air for cabin heat and windshield defrost.
Is this the right 2003-2006 Chevy Silverado 1500 heater core?
It is listed for the 2003-2006 Chevrolet Silverado 1500. Check the "Vehicles it fits" section to confirm your exact year and model before ordering.
What is this heater core made of?
Four Seasons lists it as an aluminum heater core with heavy-duty construction. It is engineered for O.E. fit, form and function and independently tested for quality and performance.
What are signs a heater core may need replacing?
Common signs include weak or no heat, a sweet coolant smell in the cabin, a foggy film on the windshield, damp carpet and coolant loss. Diagnose first, because other faults can cause these.
What does installing a heater core involve?
The job involves draining coolant and accessing the HVAC housing, which varies by vehicle. Follow the service information, then refill and bleed the cooling system and check for leaks.
