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20 Best 2003 Chevy Blazer Heater Core of 2023 – Romance University

After hours researching and comparing all models on the market, Romance University finds out the Best 2003 Chevy Blazer Heater Core of 2023. Check our ranking below.

2,879 Reviews Scanned

SaleRank No. #1

For Chevy Blazer Heater Core 1998-2005 | GM3128107 | 52473178

Exact fit to OEM#: 52473178 and Partslink#: GM3128107
Meets or exceeds DOT & SAE compliance standards
Heater Core | Replaces DPI Number: 9943
Factory Sealed - Brand new in box
S10/BLAZER 98-05 HEATER CORE

Rank No. #2

TYC 96006 Heater Core Compatible with 1998-2004 Chevrolet S10 Pickup

【Perfect Fit】Direct OE replacement with drop-in precise fitment and easy installation
【Premium Quality】 Premium grade aluminum tubes and precision folded and louvered aluminum fins ensure optimal and efficient heat distribution
【Exceptional Performance】 Comparable tubes and fin pitch to the OE counterpart producing similar coolant flow volume to meet or exceed OE performance
【Proven Reliability】 Individually leak-tested before packaged to ensure heater core functions right out of the box

Rank No. #3

OCPTY Heater Core Fits for 1998-2005 for Chevrolet Blazer 1998-2004 for Chevrolet S10 1998-2001 for GMC Jimmy 1998-2004 for GMC Sonoma 1998-2000 for Isuzu Hombre

Heater for 1998 1999 2000 2001 2002 2003 2004 for Chevrolet S10 1998 1999 2000 2001 for GMC Jimmy 1998 1999 2000 2001 2002 2003 2004 for GMC Sonoma 1998 1999 2000 Isuzu Hombre 1998 1999 2000 2001 Oldsmobile Bravada
REPLACE NUMBERS - 93014 394195 9010035 52473178 9943 500008 98014
WHY REPLACE - If your heater is not producing heat, or you can smell coolant inside your vehicle, or you see coolant leaking inside your vehicle it is time to replace your heater core
PLEASE NOTE - Please check car make model trim engine,product appearance and part number to make sure this is the right part you need.

SaleRank No. #4

A-Premium Front HVAC Heater Core Compatible with Chevrolet Blazer 1998-2005, S10 1998-2004 & GMC Jimmy 1998-2001, Sonoma 1998-2004 & Isuzu Hombre 1998-2000 & Oldsmobile Bravada 1998-2001, # 52473178

[Vehicle Fitment]: Compatible with Chevrolet Blazer 1998-2005 (Sport Utility), S10 1998-2004 (All Style Pickup); Compatible with GMC Jimmy 1998-2001 (Sport Utility), Sonoma 1998-2004 (All Style Pickup); Compatible with Isuzu Hombre 1998-2000 (All Style Pickup); Compatible with Oldsmobile Bravada 1998-2001 (Sport Utility)---Front Side
[Reference Number]: 93014, 96006, 90014, 9010035, 8231235, 1560087, HT394195C, 8524731780, GM3128107, 52473178---Please enter your vehicle information in the top left corner of listing and check our "Special Note" before ordering
[Specifications]: ①Depth(IN): 1-3/8; ②Height(IN): 8-1/4; ③Width(IN): 7-1/8; ④Thickness(IN): 1.02 ; ⑤Inlet Diameter(IN): 3/4; ⑥Outlet Diameter(IN): 5/8; ⑦Material: Aluminum
[Advantage]: High performance HVAC Heater Core, made of excellent aluminum material to ensure core sealing and leak-proof. High-density multilouver fins dissipate heat faster and reduce pressure
[Buy with Confidence]: A-Premium offers a one-year unlimited-mileage guarantee on our meticulously crafted HVAC heater core. We offer a wide variety of automotive accessory categories, ensuring that you can hit the road with peace of mind.

SaleRank No. #5

A-Premium HVAC Heater Core Compatible with Chevy Blazer C10 C20 C30 C60 C70 K10 K20 K30 P30 R10 R20 R30 V10 V20 V30 C10 Pickup C10 Suburban & GMC C1500 C25 C2500 C35 C3500 K15 K1500 and More Models

[Vehicle Fitment-1]: Compatible with Chevrolet Blazer 1973-1974/1987-1991, C10/C20/C30/K10/K20/K5 Blazer 1975-1986, C10 Pickup/C20 Pickup/C30 Pickup 1973-1974, C10 Suburban 1974-1986, C20 Suburban 1979, C20 Suburban/K10 Suburban 1984-1986, C60/R10/V10/V20/V30 1987, C70 1988, K10 Pickup 1974, K20 Suburban 1983-1986, K30 1977-1986, P30 1981-1996, R10 Suburban/R20/R20 Suburban/R30/V10 Suburban/V20 Suburban 1987-1988, R1500 Suburban/R2500 Suburban/R3500/V1500 Suburban/V2500 Suburban/V3500 1989-1991
[Vehicle Fitment-2]: Compatible with GMC C15/K15/K25 1975-1978, C1500/K1500/K2500 1979-1986, C25 1976-1978, C2500 1979-1982, C2500/C3500 1984-1986, C35 1977, C3500 1979, C3500 1981, K3500 1983-1986, P3500 1984-1996, R1500/R2500/V1500/V2500 1987, R1500 Suburban/V1500 Suburban/V2500 Suburban 1989-1991, R3500 1989
[Important Note]: It ONLY fits models WITH Air Conditioning
[Reference Number]: The A-Premium HVAC Heater Core's reference number: 9010079, 94552, 3027265. Before placing an order, verify that the part is compatible with your vehicle using the compatibility system.
[Specifications]: Height (IN): 6-5/8; Width (IN): 7-1/4; Depth (IN): 2; Inlet Diameter (IN): 5/8; Outlet Diameter (IN): 3/4; Material: Aluminum

Last update on 2025-07-10 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

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FAQ:

Q: What are some of the Chevy Blazer coolant leak problems?

A: The Chevrolet Blazer uses a coolant-heated radiator core mounted in the dashboard to provide heated air into the passenger compartment. This heater core can become clogged and leak, as it is usually the lowest point in the coolant system and debris settles into it.

Q: How do you replace the heater core on a Ford Explorer?

A: Replace the heater core with a new one by sliding it into place and securing the mounting bolts. Reconnect the heater core’s hoses, turn the radiator’s drain plug clockwise to close it, then refill the coolant system with a 50/50 percent mix of coolant and water.

Q: How do you replace the heater core on a Toyota Corolla?

A: Unbolt the heater core’s mounts with a socket wrench in a counter-clockwise direction. Once the bolts are free, the heater core can be maneuvered toward the windshield and slid out. Some coolant may splash out, so have a towel handy. Replace the heater core with a new one by sliding it into place and securing the mounting bolts.

Q: How do you remove the heater core hoses on a Honda Accord?

A: Remove the heater core hoses, on the upper left of the engine bay, by pinching their hose clamps with a pair of pliers and pulling them off. Some models will have screw-type hose clamps; turning them counter-clockwise will loosen them.

2003 Chevy Blazer Heater Core