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Heater Core for 2003 GMC Sierra 1500

We have 7 Items In-stock. Select your vehicle's Submodel to continue.

Replacement Direct Fit Heater Core

This Replacement Direct Fit Heater Core is made from top quality materials and replaces your damaged stock unit.

  • OE comparable part
  • Affordable replacement for broken or damaged part
  • Comes with 1-year unlimited mileage warranty

Replacement brand parts are the most affordable solution for your replacement needs! Replacement specializes in a wide range of OE comparable auto parts including body parts, lighting, electrical, brakes, suspension, intake, exhaust, cooling and heating parts. All Replacement brand items are backed by 1-year, unlimited-mileage warranty.

Replacement Heater Core, Front, Direct Fit, Sold Individually
$40.50 List Price $47.79 Save $7.29 Availability: In Stock
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Intead of 41,
  • SKU#: REPC503005
  • Anticipated Ship Out Time: Same day - 1 business day
  • Dimensions: 8.25 x 7.5 x 1.38 in.
  • Inlet Size: 0.75 in.
  • Outlet Size: 0.75 in.
  • Replaces OE Number: 52473322
  • Warranty: 1-year, unlimited-mileage warranty
see more Fits the following 2003 GMC Sierra 1500 submodels:
  • 6 Cyl 4.3L | SLE, SLT, SL, Base, WT
  • 8 Cyl 4.8L | SLT, SLE, SL, Base, WT
  • 8 Cyl 5.3L | SLE, SLT, SL, Base, WT
  • 8 Cyl 6.0L | Denali
Rating: (see review/s)

"great product not for a rookie to try to install in 2000 gmc pickup." posted by: pat on February 3, 2013

Spectra Direct Fit Heater Core

Spectra has long been a trustworthy brand in manufacturing replacement heater cores for your heating and air conditioning system. Great fit, efficient functionality, and tough framework are the defining features of Spectra's OE equivalent heater core. This replacement product is meticulously fashioned to work like the initial heater core fitted in your motor vehicle. Every Spectra Direct Fit Heater Core is crafted according to precise criterias in order to perform this production feat.

For safer or relaxing ride, frequent automobile examination is recommended. Uncomfortable ride quality, lousy general operation, lower than optimal gas mileage, or increased risk for hardware break down are merely several drawbacks of driving a motor vehicle with a faulty automotive component. Order Spectra Direct Fit Heater Core to fix your heating and air conditioning system to its optimum shape.

Spectra Heater Core, Front, Direct Fit, Sold Individually
$52.70 List Price $62.19 Save $9.49 Availability: In Stock
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  • SKU#: SPI93050
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: 8.25 x 7.5 x 1.38 in.
  • Inlet Size: 0.75 in.
  • Outlet Size: 0.75 in.
  • Warranty: 1-year Spectra limited warranty
Fits the following 2003 GMC Sierra 1500 submodels:
  • 6 Cyl 4.3L | SLE, SLT, SL, Base, WT
  • 8 Cyl 4.8L | SLT, SLE, SL, Base, WT
  • 8 Cyl 5.3L | SLE, SLT, SL, Base, WT
  • 8 Cyl 6.0L | Denali
Rating: (see review/s)

"I loved the part. It had prompt and speedy delivery and was about 30 dollars less than my local parts store. I recommend it to everyone." posted by: on February 5, 2014

ProRad Direct Fit Heater Core

ProRad Direct Fit Heater Core

ProRad Direct Fit Heater Core is the perfect replacement part of choice when it's time to restore your Heater Core. General performance wise, it would work as proficiently as the genuine heater core that came with your vehicle as it was released out new from the factory. Replacing automotive parts is a simple fact of life when fixing or modifying your vehicle. Eliminate the threat of unanticipated breakdown and potential harm to your various other automobile components by changing your aged and worn out heater core.

Features:

  • Meets and exceeds OE specifications
  • Easy installation process
  • Provides reliable performance and lengthy service life
ProRad Heater Core, Direct Fit, Sold Individually, Same Day - 1 Business Day
$58.04 List Price $68.49 Save $10.45 Availability: In Stock
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  • SKU#: APDI9010463
  • Dimensions: 7.13 x 7.25 x 2 in.
  • Inlet Size: 0.75 in.
  • Outlet Size: 0.75 in.
Fits the following 2003 GMC Sierra 1500 submodels:
  • 6 Cyl 4.3L | SLE, SLT, Base, WT, SL
  • 8 Cyl 4.8L | SLT, Base, SLE, WT, SL
  • 8 Cyl 5.3L | Base, SLE, SLT, WT, SL
  • 8 Cyl 6.0L | Denali
ProRad Heater Core, Direct Fit, Sold Individually, Same Day - 1 Business Day
$62.25 List Price $73.46 Save $11.21 Availability: In Stock
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  • SKU#: APDI9010281
  • Dimensions: 8 x 7.5 x 1 in.
  • Inlet Size: 0.75 in.
  • Outlet Size: 0.75 in.
Fits the following 2003 GMC Sierra 1500 submodels:
  • 6 Cyl 4.3L | SLE, SLT, SL, Base, WT
  • 8 Cyl 4.8L | SLT, SLE, SL, Base, WT
  • 8 Cyl 5.3L | SLE, SLT, SL, Base, WT
  • 8 Cyl 6.0L | Denali

AC Delco Direct Fit Heater Core

AC Delco Direct Fit Heater Core is the replacement of preference if it's time for you to repair your car's heating and air conditioning system. It is identically patterned to be just like the genuine heater core which was primarily included with your motor vehicle so that you can be sure of its overall performance.

Replacing automotive parts is an essential task in fixing or customizing your car or truck. Switching to new ones enhances heating and air conditioning overall performance and effectively minimizes the danger of having the worn out component damaging some other parts of your automobile. Replace parts which are in terrible condition to enable your heating and air conditioning to run with highest possible effectiveness or yourself to travel with a peaceful mind set.

AC Delco Heater Core, Direct Fit, Sold Individually, 1-2 Business Days
$146.70 List Price $173.11 Save $26.41 Availability: In Stock
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  • SKU#: AC1562827
  • Warranty: 1-year or 12,000-mile AC Delco limited warranty
Fits the following 2003 GMC Sierra 1500 submodels:
  • 8 Cyl 5.3L | SL, Base, SLE, SLT, WT
  • 8 Cyl 6.0L | Denali
  • 6 Cyl 4.3L | SLE, SLT, Base, WT, SL
  • 8 Cyl 4.8L | SLT, Base, SLE, WT, SL
AC Delco Heater Core, Direct Fit, Sold Individually, 1-2 Business Days
$142.78 List Price $168.48 Save $25.70 Availability: In Stock
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  • SKU#: AC1562960
  • Warranty: 1-year or 12,000-mile AC Delco limited warranty
Fits the following 2003 GMC Sierra 1500 submodels:
  • 8 Cyl 5.3L | SL, Base, SLE, SLT, WT
  • 6 Cyl 4.3L | SLE, SLT, Base, WT, SL
  • 8 Cyl 4.8L | SLT, Base, SLE, WT, SL

GPD Direct Fit Heater Cores

For dependable Heater Cores, always rely on GPD. These Heater Cores are designed and manufactured from high quality components to meet or surpass OE requirements and specifications. With its high standard facilities, these AC parts assure quality and functionality like no others.
GPD Heater Core, Direct Fit, Same Day - 1 Business Day, 1-year Limited Warranty
$50.26 List Price $59.31 Save $9.05 Availability: In Stock
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  • SKU#: GPD8231379
Fits the following 2003 GMC Sierra 1500 submodels:
  • 6 Cyl 4.3L | SLE, SLT, SL, Base, WT
  • 8 Cyl 4.8L | SLT, SLE, SL, Base, WT
  • 8 Cyl 5.3L | SLE, SLT, SL, Base, WT