2003 GMC Sierra 2500 Heater Core

Your 2003 GMC Sierra 2500 might be the best vehicle you’ve ever owned. Or you may just be struggling to keep it highway-approved. No matter the situation, Advance Auto Parts has the Heater Core product you desperately need.

We currently carry 4 Heater Core products to choose from for your 2003 GMC Sierra 2500, and our inventory prices range from as little as $112.91 up to $204.99.

On top of low prices, Advance Auto Parts offers 3 different trusted brands of Heater Core products for the 2003 GMC Sierra 2500. We only sell parts from trusted brands like Carquest Premium so that you can find quality parts you can count on.

Don’t take our word for it - check out customer ratings and reviews to buy with confidence. We have 16 reviews on our Heater Core products for the 2003 GMC Sierra 2500 from previous customers.

Have parts delivered straight to your home, or find the nearest Advance Auto Parts store to check out our Heater Core stock in-person!

Heater Core for Your 2003 GMC Sierra 2500

Search through our amazing selection of Heater Core products for your 2003 GMC Sierra 2500 to find exactly what you’re looking for. Compare prices and reviews to choose the best part for you.

GM Genuine Parts - Heater Core (Part No. 15-62960)
Description
GM Genuine Parts HVAC Heater Cores are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These HVAC heater cores are small radiators, located in the plenum behind the dashboard. Engine coolant flows through the heater core in order to heat the air in the passenger compartment. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Product Features:
Long-life alloys provide corrosion resistance
High-strength brazed joints ensure durability
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type
GM regularly updates production and service part designs to integrate new materials and technologies

5.0

Read 1 review(s)

Review snapshot ® by PowerReviews

5.0

5.0

5

5

2020-06-28

5

5

I would buy this again but it's a little bit too high priced

I would buy this again but it's a little bit too high priced

Submitted 2020-06-28

By Michael

From Undisclosed

Just like to factory original

Bottom Line NULL

Just like to factory original

By Michael from Undisclosed

BOTTOM LINE NULL
from $204.99
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Carquest Premium - HVAC Heater Core (Part No. 910463)
Description
All heater cores are designed and tested to match or exceed OE specifications for form, fit and performance with a clear focus on obtaining the highest heat transfer performance possible through use of quality materials and manufacturing processes to ensure optimal heating.

Product Features:
CARQUEST offers a complete line of automotive heaters covering 94% of all North American vehicle applications.
CARQUEST provides value in several ways, including increased thermal performance and resistance to corrosion using enhanced design features, such as the latest fin and tube technology and design standardization for maximum availability.
CARQUEST offers certified heaters that meet or exceed OE specifications and are all fitment checked in the actual vehicle's HVAC heater module and are, thus, ready to be installed right out of the box for a "Drop-In Fit".
CARQUEST heaters are engineered and manufactured under ISO TS16949 quality systems and are 100% leak tested.

5.0

Read 1 review(s)

Review snapshot ® by PowerReviews

5.0

5.0

5

5

2020-11-12

5

5

I would buy it again

I would buy it again

Submitted 2020-11-12

By tommy

From Undisclosed

Don't need it but they got it here quickly

Bottom Line NULL

Don't need it but they got it here quickly

By tommy from Undisclosed

BOTTOM LINE NULL
from $128.99
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Carquest Premium - HVAC Heater Core (Part No. 394204)
Description
All heater cores are designed and tested to match or exceed OE specifications for form, fit and performance with a clear focus on obtaining the highest heat transfer performance possible through use of quality materials and manufacturing processes to ensure optimal heating.

Product Features:
CARQUEST offers a complete line of automotive heaters covering 94% of all North American vehicle applications.
CARQUEST provides value in several ways, including increased thermal performance and resistance to corrosion using enhanced design features, such as the latest fin and tube technology and design standardization for maximum availability.
CARQUEST offers certified heaters that meet or exceed OE specifications and are all fitment checked in the actual vehicle's HVAC heater module and are, thus, ready to be installed right out of the box for a "Drop-In Fit".
CARQUEST heaters are engineered and manufactured under ISO TS16949 quality systems and are 100% leak tested.

3.5

Read 3 review(s)

Review snapshot ® by PowerReviews

3.5

3.5

3

3

2018-11-26

3

3

Check part over...

Check part over...

Submitted 2018-11-26

By Timothy

From Undisclosed

The first heater core I got the tubes were too close together no matter how they were rotated the plastic connectors would have no room due to improper crimp angle. I took it back and exchanged it for another one hoping to get something different. Sure enough, even though it was in a CARQUEST box with the same part number I could tell this was from a different manufacturer, it was made by Spectra. The tubes lined up correctly on the new one although one was a bit too easy to rotate for my taste. I haven't put it in yet so I hope it doesn't leak. Look at your parts, make sure they are correct and passes your quality check.

Bottom Line NULL

The first heater core I got the tubes were too close together no matter how they were rotated the plastic connectors would have no room due to improper crimp angle. I took it back and exchanged it for another one hoping to get something different. Sure enough, even though it was in a CARQUEST box with the same part number I could tell this was from a different manufacturer, it was made by Spectra. The tubes lined up correctly on the new one although one was a bit too easy to rotate for my taste. I haven't put it in yet so I hope it doesn't leak. Look at your parts, make sure they are correct and passes your quality check.

By Timothy from Undisclosed

BOTTOM LINE NULL

1

1

2018-11-19

1

1

DOES NOT FIT EARLY 2000 DENALI WITH 5.7 motor

DOES NOT FIT EARLY 2000 DENALI WITH 5.7 motor

Submitted 2018-11-19

By unhappy

From Hayes, Va

Bought online and after picking up and pulling my vehicle apart found it does not fit. This must be for a LATE 2000 and up. The one listed for 1999 Yukon Denali fits. Catalog in store is wrong too.

Bottom Line not recommended

Bought online and after picking up and pulling my vehicle apart found it does not fit. This must be for a LATE 2000 and up. The one listed for 1999 Yukon Denali fits. Catalog in store is wrong too.

By unhappy from Hayes, Va

BOTTOM LINE not recommended

5

5

2018-06-15

5

5

Great

Great

Submitted 2018-06-15

By Tonja

From undisclosed

Wonderful product for the price

Bottom Line NULL

Wonderful product for the price

By Tonja from undisclosed

BOTTOM LINE NULL
from $132.99
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Santech - Heater Core (Part No. R3000223256SII)

from $112.91
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