2003 GMC Sierra 2500 HD Electrical, Lighting and Body Parts
Choose your Part Name for your 2003 GMC Sierra 2500 HD
Accessory Power Relay
Air Bag Clockspring
Air Bag Impact Sensor
Antenna Adapter
Ash Tray Light Bulb
Back Up Light Bulb
Body Control Module
Brake Light Bulb
Brake Light Control Module
Brake Light Switch
Center High Mount Stop Light
Center High Mount Stop Light Bulb
Center High Mount Stop Light Cover
Combination Switch
Cornering Light Assembly
Courtesy Light Bulb
Daytime Running Light Bulb
Dome Light
Dome Light Bulb
Door Window Switch
Engine Compartment Light Bulb
Exterior Multi-Purpose LED
Flood Light
Fog Light
Fog Light Assembly
Fog Light Bulb
Fog Light Relay
Glove Box Light Bulb
Headlight Assembly
Headlight Bulb
Headlight Conversion Kit
Headlight Fastener Clip
Headlight Set
Headlight Wiring Harness
Horn Relay
Keyless Entry Transmitter
License Plate Light
License Plate Light Bulb
License Plate Light Lens
Light Bar
Light Bar Mounting Kit
Luggage Compartment Light Bulb
Map Light Bulb
Multi-Purpose Fuse
Multi-Purpose Light Bulb
Neutral Safety Switch
Parking Light Bulb
Power Window Motor
Power Window Motor and Regulator Assembly
Roof Marker Light
Side Marker Light Bulb
Speedometer Calibrator
Tail Light Assembly
Tail Light Bulb
Tail Light Guard
Tail Light Set
Trailer Brake System Connector
Trailer Connector Kit
Trailer Wiring Adapter Connector
Trailer Wiring Harness
Trunk Light Bulb
Trunk or Cargo Area Light
Turn Signal / Combination Lever
Turn Signal / Parking Light Assembly
Turn Signal Light
Turn Signal Light Bulb
Underbody Light Kit
Vehicle Speed Sensor
Vehicle-Mounted Spotlight
Wheel Accent Light
Image
Product
Price
- 10ft. Custom Wiring Extension Harness (Adds 7-Way RV Blade to Truck Bed)
- 7 Way; 10 ft.; For 5th Wheel or Gooseneck In Bed Connection Install Time 45 Minutes
- CURT 56000 10-Foot Vehicle-Side Truck Bed 7-Pin Trailer Wiring Harness Extension; Select Chevrolet; Dodge; Ford; GMC; Nissan; Ram; Toyota
- Custom Wiring Harness Extension
- Product Attributes:
- WARNING CA Proposition 65: Yes
- Install Time: 45 Minutes
-
Features:
- Routes A 7-Way Into Truck Bed While Retaining Use Of Rear Socket
- Simple Plug-And-Play Design Eliminates The Need For Splicing
- Allows For Easy Connection Of 5Th Wheel Or Gooseneck Wiring
- 7-Way Connects Tail Brake Reverse Turn Signals Brakes
- 10 ft. Extension w/Right-Angle Plug For Easy Installation
- Spring-Loaded Dust Cover Keeps Connector Clean When Not In Use
- Slit Loom Keeps Wires Contained And Well Protected
- There is nothing like the luxury and power that go along with heavy-duty towing. 5th wheel RVs offer a deluxe, home-away-from-home experience unlike any other, while gooseneck trailers possess a strength that far surpasses most other trailer options. As with any trailer, however, 5th wheels and goosenecks must be equipped with the proper lighting and electrical systems, and tend to require even more complex connectors than a standard receiver-type trailer setup. Make things simple with a CURT 5th wheel / gooseneck extension harness. These wiring harnesses are designed to put an extra connector socket in the bed of your pickup truck while still retaining power to the rear connector socket mounted on your bumper. This is done by plugging into the back of the existing original equipment (OEM) harness and routing through the body of the truck to a hole in the truck bed, providing a connector that is ready to accommodate your 5th wheel or gooseneck trailer. This CURT extension harness is designed to work with 7-way RV blade connectors and comes in a length of 10. It is compatible with certain models of Chevrolet, Dodge, Ford, GMC, Nissan, Ram and Toyota (see application to verify fitment). When you need a towing electrical solution that allows you to switch back and forth between your receiver hitch and specialized trailer hitch, CURT gets you plugged in.
Additional Fitment Information:
| Vehicle |
|---|
| 2003 - GMC Sierra 2500 HD |
- 7ft. Custom Wiring Extension Harness (Adds 7-Way RV Blade to Truck Bed; Packaged
- 7 Way; 7 ft.; For 5th Wheel or Gooseneck In Bed Connection; Packaged Install Time 45 Minutes
- CURT 56070 7-Foot Vehicle-Side Truck Bed 7-Pin Trailer Wiring Harness Extension; Select Chevrolet; Dodge; Ford; GMC; Nissan; Ram; Toyota
- Custom Wiring Harness Extension
- Product Attributes:
- WARNING CA Proposition 65: Yes
- Install Time: 45 Minutes
-
Features:
- Routes A 7-Way Into Truck Bed While Retaining Use Of Rear Socket
- Simple Plug-And-Play Design Eliminates The Need For Splicing
- Allows For Easy Connection Of 5Th Wheel Or Gooseneck Wiring
- 7-Way Connects Tail Brake Reverse Turn Signals Brakes
- 7 ft. Extension w/Right-Angle Plug For Easy Installation
- Spring-Loaded Dust Cover Keeps Connector Clean When Not In Use
- Slit Loom Keeps Wires Contained And Well Protected
- There is nothing like the luxury and power that go along with heavy-duty towing. 5th wheel RVs offer a deluxe, home-away-from-home experience unlike any other, while gooseneck trailers possess a strength that far surpasses most other trailer options. As with any trailer, however, 5th wheels and goosenecks must be equipped with the proper lighting and electrical systems, and tend to require even more complex connectors than a standard receiver-type trailer setup. Make things simple with a CURT 5th wheel / gooseneck extension harness. These wiring harnesses are designed to put an extra connector socket in the bed of your pickup truck while still retaining power to the rear connector socket mounted on your bumper. This is done by plugging into the back of the existing original equipment (OEM) harness and routing through the body of the truck to a hole in the truck bed, providing a connector that is ready to accommodate your 5th wheel or gooseneck trailer. This CURT extension harness is designed to work with 7-way RV blade connectors and comes in a length of 7. It is compatible with a certain models of Chevrolet, Dodge, Ford, GMC, Nissan, Ram and Toyota (see application to verify fitment). When you need a towing electrical solution that allows you to switch back and forth between your receiver hitch and specialized trailer hitch, CURT gets you plugged in.
Additional Fitment Information:
| Vehicle |
|---|
| 2003 - GMC Sierra 2500 HD |
- Plug-In Simple® Multi-Tow® 7-Blade And OEM 4-Flat Connector
- Includes Mounting Bracket
- Plug-In Simple® Multi-Tow® 7-Blade And OEM 4-Flat Connector; Includes Mounting Bracket;
- Plug-In Simple(R) Multi-Tow(R) 7-Blade And OEM 4-Flat Connector
- Product Attributes:
- WARNING CA Proposition 65: Yes
- WARNING CA Proposition 65 Message: Warning: This Product Can Expose You To Chemicals Including Dehp; Which Is Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. For More Information Go To Www.p65warnings.ca.gov
-
Features:
- Multi-Tow® Provides Multiple Towing Options From One Connector
- Plug-In Simple® Wiring Kit
- Utilizes OEM Connectors Create An Exact Fit
- Includes Mounting Bracket And Hardware
- Impact And Corrosion Resistant
- Weatherproof Lid
- Pre-Greased Terminals For Added Protection
- Includes Step-By-Step Instructions
- 90 Day Warranty From The Date Of Original Purchase
- Tow more than one trailer? This exact OEM replacement Multi-Tow(R) design features multiple towing options from one connector by providing sockets for towing both 7 blade and 4 flat trailers. This connector is Plug-In Simple!(R) with no cutting or splicing, saving you time by utilizing an OEM connector to create an exact fit for easy installation and maximum weatherproofing.
Additional Fitment Information:
| Vehicle |
|---|
| 2003 - GMC Sierra 2500 HD |
- Plug-In Simple® Endurance™ Multi-Tow® 7-Blade And 4-Flat Connector
- Traditional 4 Hole Mount; 3 Year Warranty
- Plug-In Simple® Endurance™ Multi-Tow® 7-Blade And 4-Flat Connector; Traditional 4 Hole Mount; 3 Year Warranty;
- Plug-In Simple(R) Endurance(TM) Multi-Tow(R) 7-Blade And 4-Flat Connector
- Product Attributes:
- WARNING CA Proposition 65: Yes
- WARNING CA Proposition 65 Message: Warning: This Product Can Expose You To Chemicals Including Dehp; Which Is Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. For More Information Go To Www.p65warnings.ca.gov
-
Features:
- Endurance™ Professional Grade
- Plug-In Simple® Wiring Kit
- Utilizes OEM Connectors Create An Exact Fit
- Multi-Tow® Provides Multiple Towing Options From One Connector
- Weatherproof Lid Opens 180 Degrees
- Oversized Hinge Offers Ultimate Durability
- Superior Ergonomics
- 3 Year Warranty From The Date Of Original Purchase
- For Use w/Factory Tow Package
- Impact And Corrosion Resistant
- By incorporating Endurance(TM) design features that include oversized hinges, internal grommets for enhanced weather proofing and a lid that opens 180 degrees, this connector is guaranteed to last for years of trouble free use. Multi-Tow(R) design feature adds multiple towing options from one connector by providing sockets for towing both 7 blade and 4 flat trailers. This connector is Plug-In Simple!(R) with no cutting or splicing, saving you time by utilizing an OEM connector to create an exact fit for easy installation and maximum weatherproofing. Four hole mount installation for standard mounting brackets.
Additional Fitment Information:
| Vehicle |
|---|
| 2003 - GMC Sierra 2500 HD |
- Plug-In Simple® Endurance™ Jacketed 5th Wheel Kit
- 6 ft.
- Plug-In Simple® Endurance™ Jacketed 5th Wheel Kit; 6 ft.;
- Plug-In Simple(R) Endurance(TM) Jacketed 5th Wheel Kit
- Product Attributes:
- Outer Finish Color: Black
- Connector Style: 6 Pole Round And 4 Flat
- Estimated Install Time (Hour): 1.00
- WARNING CA Proposition 65: Yes
- WARNING CA Proposition 65 Message: Warning: This Product Can Expose You To Chemicals Including Dehp; Which Is Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. For More Information Go To Www.p65warnings.ca.gov
- Connector Type: Vehicle Side
- Install Method: Direct-fit
-
Features:
- Endurance™ Professional Grade
- Plug-In Simple! Wiring Kit
- No Cutting/No Splicing
- Saves Time
- 90 Degree Angle Connector For Hard To Reach Places
- 7 Blade With Robust 180 Degree Hinge
- 3 Year Warranty
- Mount this 7-way connector in your truck bed to simplify hookup of your 5th-wheel or gooseneck trailer, all while retaining the use of factory 7-pole at the bumper. Endurance(TM) 5th wheel harnesses provide maximum durability, weather proofing, and an industry leading 3 year warranty.
Additional Fitment Information:
| Vehicle |
|---|
| 2003 - GMC Sierra 2500 HD |
- Endurance™ 5th Wheel Vehicle To Trailer Wiring Harness
- Mounts In Truck Bed For Easy Connection; Retains Electrical Functions At Rear Of Tow Vehicle; 3 Year Warranty
- Endurance™ 5th Wheel Vehicle To Trailer Wiring Harness; Mounts In Truck Bed For Easy Connection; Retains Electrical Functions At Rear Of Tow Vehicle; 3 Year Warranty;
- Endurance(TM) 5th Wheel Vehicle To Trailer Wiring Harness
- Product Attributes:
- Outer Finish Color: Black
- Connector Style: 7 Blade And 4 Flat
- Estimated Install Time (Hour): 1.50
- WARNING CA Proposition 65: Yes
- WARNING CA Proposition 65 Message: Warning: This Product Can Expose You To Chemicals Including Dehp; Which Is Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. For More Information Go To Www.p65warnings.ca.gov
- Connector Type: Vehicle Side
- Install Method: Direct-fit
-
Features:
- Endurance™ Professional Grade
- Plug-In Simple® Wiring Kit
- 90 Degree Angle Connector For Hard To Reach Places
- 7 Blade With Robust 180 Degree Hinge
- Wire Length Is 10 ft.
- Convoluted Tubing Protects Wire From Harm
- Includes Step-By-Step Instructions
- 90 Day Warranty From The Date Of Original Purchase
- By incorporating Endurance(TM) design features that include oversized hinges, internal grommets for enhanced weather proofing and a lid that opens 180 degrees, this connector is guaranteed to last for years of trouble free use. This 5th wheel harness is Plug-In Simple!(R) with no cutting or splicing, saving you time by utilizing OEM connectors to create an exact fit installation and maximum weatherproofing while retaining the use of the factory 7 Blade in the bumper . Mounting a secondary 7 Blade in your truck bed makes 5th wheel and gooseneck hookups easier and more convenient.
Additional Fitment Information:
| Vehicle |
|---|
| 2003 - GMC Sierra 2500 HD |
- Plug-In Simple® Multi-Tow® 7-Blade And 4-Flat Harness
- Includes Mounting Bracket
- Plug-In Simple® Multi-Tow® 7-Blade And 4-Flat Harness; Includes Mounting Bracket;
- Plug-In Simple(R) Multi-Tow(R) 7-Blade And 4-Flat Harness
- Product Attributes:
- Outer Finish Color: Black
- Connector Style: 7 Blade And 4 Flat
- Estimated Install Time (Hour): 0.50
- WARNING CA Proposition 65: Yes
- WARNING CA Proposition 65 Message: Warning: This Product Can Expose You To Chemicals Including Dehp; Which Is Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. For More Information Go To Www.p65warnings.ca.gov
- Connector Type: Vehicle Side
- Install Method: Direct-fit
-
Features:
- Multi-Tow® Provides Multiple Towing Options From One Connector
- Plug-In Simple® Wiring Kit
- Utilizes OEM Connectors Create An Exact Fit
- Includes Mounting Bracket And Hardware
- Impact And Corrosion Resistant
- Weatherproof Lid
- Fits In Standard 7 Blade Bracket
- Includes Step-By-Step Instructions
- 90 Day Warranty From The Date Of Original Purchase
- Tow more than one trailer? Multi-Tow(R) design feature adds multiple towing options from one connector by providing sockets for towing both 7 blade and 4 flat trailers. This connector is Plug-In Simple!(R) with no cutting or splicing, saving you time by utilizing an OEM connector to create an exact fit for easy installation and maximum weatherproofing.
Additional Fitment Information:
| Vehicle |
|---|
| 2003 - GMC Sierra 2500 HD |
- Plug-In Simple® Endurance™ 7-Blade Vehicle To Trailer Wiring Connector
- Traditional 4 Hole Mount; 3 Year Warranty
- Plug-In Simple® Endurance™ 7-Blade Vehicle To Trailer Wiring Connector; Traditional 4 Hole Mount; 3 Year Warranty;
- Plug-In Simple(R) Endurance(TM) 7-Blade Vehicle To Trailer Wiring Connector
- Product Attributes:
- WARNING CA Proposition 65: Yes
- WARNING CA Proposition 65 Message: Warning: This Product Can Expose You To Chemicals Including Dehp; Which Is Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. For More Information Go To Www.p65warnings.ca.gov
-
Features:
- Endurance™ Professional Grade
- Plug-In Simple® Wiring Kit
- Utilizes OEM Connectors Create An Exact Fit
- Corrosion Resistant Terminals
- Weatherproof Lid Opens 180 Degrees
- Oversized Hinge Offers Ultimate Durability
- Superior Ergonomics
- 3 Year Warranty From The Date Of Original Purchase
- By incorporating Endurance(TM) design features that include oversized hinges, internal grommets for enhanced weather proofing and a lid that opens 180 degrees, this connector is guaranteed to last for years of trouble free use. This connector is Plug-In Simple!(R) with no cutting or splicing, saving you time by utilizing an OEM connector to create an exact fit for easy installation and maximum weatherproofing. Four hole mount installation for standard mounting brackets.
Additional Fitment Information:
| Vehicle |
|---|
| 2003 - GMC Sierra 2500 HD |
- 7ft. Custom Wiring Extension Harnesses (Adds 7-Way RV Blade to Truck Bed; 10-Pac
- 7 Way; 7 ft.; For 5th Wheel or Gooseneck In Bed Connection; Pack of 10 Install Time 45 Minutes
- CURT 56070010 7-Foot Vehicle-Side Truck Bed 7-Pin Trailer Wiring Harness Extensions; Select Chevy; Dodge; Ford; GMC; Nissan; Ram; Toyota; 10-Pk
- Custom Wiring Harness Extension
- Product Attributes:
- WARNING CA Proposition 65: Yes
- Install Time: 45 Minutes
-
Features:
- Routes A 7-Way Into Truck Bed While Retaining Use Of Rear Socket
- Simple Plug-And-Play Design Eliminates The Need For Splicing
- Allows For Easy Connection Of 5Th Wheel Or Gooseneck Wiring
- 7-Way Connects Tail Brake Reverse Turn Signals Brakes
- 7 ft. Extension w/Right-Angle Plugs For Easy Installation
- Spring-Loaded Dust Cover Keeps Connector Clean When Not In Use
- Slit Loom Keeps Wires Contained And Well Protected
- There is nothing like the luxury and power that go along with heavy-duty towing. 5th wheel RVs offer a deluxe, home-away-from-home experience unlike any other, while gooseneck trailers possess a strength that far surpasses most other trailer options. As with any trailer, however, 5th wheels and goosenecks must be equipped with the proper lighting and electrical systems, and tend to require even more complex connectors than a standard receiver-type trailer setup. Make things simple with a CURT 5th wheel / gooseneck extension harness. These wiring harnesses are designed to put an extra connector socket in the bed of your pickup truck while still retaining power to the rear connector socket mounted on your bumper or trailer hitch. This is done by plugging into the back of the existing original equipment (OEM) harness and routing through the body of the truck to a hole in the truck bed, providing a connector that is ready to accommodate your 5th wheel or gooseneck trailer. These CURT extension harnesses are designed to work with 7-way RV blade connectors and come with 7 of wire. Ten harnesses are included in each package. They are compatible with certain models of Chevrolet, Dodge, Ford, GMC, Nissan, Ram and Toyota (see application to verify fitment). When you need a towing electrical solution that allows you to switch back and forth between your receiver hitch and specialized trailer hitch, CURT gets you plugged in.
Additional Fitment Information:
| Vehicle |
|---|
| 2003 - GMC Sierra 2500 HD |
- Plug-In Simple® Endurance™ Multi-Tow® 7-Blade And 4-Flat Twist-Mount Connector
- 3 Year Warranty
- Plug-In Simple® Endurance™ Multi-Tow® 7-Blade And 4-Flat Twist-Mount Connector; 3 Year Warranty;
- Plug-In Simple(R) Endurance(TM) Multi-Tow(R) 7-Blade And 4-Flat Twist-Mount Connector
- Product Attributes:
- WARNING CA Proposition 65: Yes
- WARNING CA Proposition 65 Message: Warning: This Product Can Expose You To Chemicals Including Dehp; Which Is Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. For More Information Go To Www.p65warnings.ca.gov
-
Features:
- Endurance™ Professional Grade
- Plug-In Simple® Wiring Kit
- Utilizes OEM Connectors Create An Exact Fit
- Multi-Tow® Provides Multiple Towing Options From One Connector
- Weatherproof Lid Opens 180 Degrees
- Oversized Hinge Offers Ultimate Durability
- Superior Ergonomics
- 3 Year Warranty From The Date Of Original Purchase
- For Use w/Factory Tow Package
- Impact And Corrosion Resistant
- By incorporating Endurance(TM) design features that include oversized hinges, internal grommets for enhanced weather proofing and a lid that opens 180 degrees, this connector is guaranteed to last for years of trouble free use. Multi-Tow(R) design feature adds multiple towing options from one connector by providing sockets for towing both 7 blade and 4 flat trailers. This connector is Plug-In Simple!(R) with no cutting or splicing, saving you time by utilizing an OEM connector to create an exact fit for easy installation and maximum weatherproofing. Easy twist-mount installation requires no tools.
Additional Fitment Information:
| Vehicle |
|---|
| 2003 - GMC Sierra 2500 HD |
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