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2003 Chevrolet Silverado 3500

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  2. Auto Parts
  3. Body Components
  4. Horns
  5. OE Replacement Horn
  6. ACDelco D1978D for 2003 Chevrolet Silverado 3500

ACDelco D1978D OE Replacement Horn
for 2003 Chevrolet Silverado 3500

ACDelco D1978D OE Replacement Horn - 2003 Chevrolet Silverado 3500

ACDelco
Brand:ACDelco
Part Number: D1978D
UPC: 021625893020
Weight: 1 lbs
Condition:New



Availability:
0 in Stock
 OUT OF STOCK

Product Information

Description:

Get the ACDelco D1978D OE Replacement Horn for your 2003 Chevrolet Silverado 3500. Buy now and secure your purchase online!

The ACDelco GM Original Equipment Replacement Horn is a GM-recommended replacement for your vehicles original component. Activated within your vehicles steering wheel, the Original Equipment Replacement Horn will make an audible noise at the front of your vehicle to signal or alert other drivers. This original equipment replacement horn has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Through our GM Original Equipment and Professional, premium aftermarket product lines, we provide ignition system and switch products for all models of GM vehicles on the road today. With ACDelco Ignition System and Switch products you can rest assured that your vehicle is receiving high quality parts engineered for long lasting performance, durability, and dependability.

Get the GM quality you know and trust with ACDelco GM Original Equipment Ignition System and Switch products. Stay with the brand of parts your General Motors vehicle came with and get peace of mind that the fit, form, and function is up to the high standards and specifications of General Motors. ACDelco GM Original Equipment Ignition System and Switch products are engineered for all models of GM vehicles on the road today.

Features and Benefits:

  • GM-recommended replacement part for your GM vehicles original factory component
  • Manufactured to GM OE specification for fit, form, and function
  • Offering the quality, reliability, and durability of GM OE
  • Having your service technician regularly inspect your ignition system can help you stay away from conditions that may result in poor performance or reduced fuel economy.

Specifications:

Connector Quantity:
1
Decibel Rating:
105
Mount Type:
Bolt On With Bracket
Mounting Bracket Included:
Yes
Mounting Hardware Included:
Yes
Terminal Quantity:
2
Terminal Type:
Pin
Voltage:
12 Volts (Direct Current)

Manufacturer Warranty:

24 Month / Unlimited Mile Limited Warranty on parts sold on or after 04/01/18. (Parts Only) Please see ACDelco.com for more details.

ACDelco D1978D OE Replacement Horn compatibility with your 2003 Chevrolet Silverado 3500...

Last Updated: 11/05/2018

Years Vehicle Per Vehicle Position Fit NotesFitment Notes

2006

 

2005

 

2004

 

2003

 

2006

 

2005

 

2004

 

2003

 
Chevrolet Silverado 3500

6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV
1
 
Right (Passenger)
 
GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
COMFORT & CONVENIENCE PKG #3(YE9)
EXCEPT DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Cab & Chassis
2 Doors
 

Chevrolet Silverado 3500



6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV

Right (Passenger) GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
COMFORT & CONVENIENCE PKG #3(YE9)
EXCEPT DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Cab & Chassis
2 Doors

1 Per Vehicle

2006

 

2005

 

2004

 

2003

 

2006

 

2005

 

2004

 

2003

 
Chevrolet Silverado 3500

6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV
1
 
Right (Passenger)
 
GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
COMFORT & CONVENIENCE PKG #3(YE9)
EXCEPT DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Cab & Chassis
4 Doors
 

Chevrolet Silverado 3500



6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV

Right (Passenger) GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
COMFORT & CONVENIENCE PKG #3(YE9)
EXCEPT DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Cab & Chassis
4 Doors

1 Per Vehicle

2006

 

2005

 

2004

 

2003

 

2006

 

2005

 

2004

 

2003

 
Chevrolet Silverado 3500

6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV
1
 
Right (Passenger)
 
GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
COMFORT & CONVENIENCE PKG #3(YE9)
EXCEPT DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Crew Cab Pickup
4 Doors
 

Chevrolet Silverado 3500



6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV

Right (Passenger) GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
COMFORT & CONVENIENCE PKG #3(YE9)
EXCEPT DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Crew Cab Pickup
4 Doors

1 Per Vehicle

2006

 

2005

 

2004

 

2003

 

2006

 

2005

 

2004

 

2003

 
Chevrolet Silverado 3500

6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV
1
 
Right (Passenger)
 
GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
COMFORT & CONVENIENCE PKG #3(YE9)
EXCEPT DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Extended Cab Pickup
4 Doors
 

Chevrolet Silverado 3500



6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV

Right (Passenger) GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
COMFORT & CONVENIENCE PKG #3(YE9)
EXCEPT DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Extended Cab Pickup
4 Doors

1 Per Vehicle

2006

 

2005

 

2004

 

2003

 

2006

 

2005

 

2004

 

2003

 
Chevrolet Silverado 3500

6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV
1
 
Right (Passenger)
 
GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
COMFORT & CONVENIENCE PKG #3(YE9)
EXCEPT DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Standard Cab Pickup
2 Doors
 

Chevrolet Silverado 3500



6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV

Right (Passenger) GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
COMFORT & CONVENIENCE PKG #3(YE9)
EXCEPT DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Standard Cab Pickup
2 Doors

1 Per Vehicle

2006

 

2005

 

2004

 

2003

 

2006

 

2005

 

2004

 

2003

 
Chevrolet Silverado 3500

6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV
1
 
Right (Passenger)
 
GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Cab & Chassis
2 Doors
 

Chevrolet Silverado 3500



6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV

Right (Passenger) GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Cab & Chassis
2 Doors

1 Per Vehicle

2006

 

2005

 

2004

 

2003

 

2006

 

2005

 

2004

 

2003

 
Chevrolet Silverado 3500

6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV
1
 
Right (Passenger)
 
GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Cab & Chassis
4 Doors
 

Chevrolet Silverado 3500



6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV

Right (Passenger) GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Cab & Chassis
4 Doors

1 Per Vehicle

2006

 

2005

 

2004

 

2003

 

2006

 

2005

 

2004

 

2003

 
Chevrolet Silverado 3500

6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV
1
 
Right (Passenger)
 
GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Crew Cab Pickup
4 Doors
 

Chevrolet Silverado 3500



6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV

Right (Passenger) GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Crew Cab Pickup
4 Doors

1 Per Vehicle

2006

 

2005

 

2004

 

2003

 

2006

 

2005

 

2004

 

2003

 
Chevrolet Silverado 3500

6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV
1
 
Right (Passenger)
 
GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Extended Cab Pickup
4 Doors
 

Chevrolet Silverado 3500



6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV

Right (Passenger) GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Extended Cab Pickup
4 Doors

1 Per Vehicle

2006

 

2005

 

2004

 

2003

 

2006

 

2005

 

2004

 

2003

 
Chevrolet Silverado 3500

6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV
1
 
Right (Passenger)
 
GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Standard Cab Pickup
2 Doors
 

Chevrolet Silverado 3500



6.0L V8 Gas OHV,
6.6L V8 Diesel OHV Turbo,
8.1L V8 Gas OHV

Right (Passenger) GM Original Equipment--Reman=No-US ACD=Y-Can ACD=Y-
DUAL HIGH NOTE HORN(7Z1)
MUST ORDER HORN SHIELD 89046906 T/W HORN KIT 89046917 WHEN SERVICING ALL C/K VEH PRODUCED STARTING IN 99 MODEL YEAR AND AFTER
MAY REQUIRE 19116451 WIRE, INCLUDES 485 HZ HORN AND BRACKET
Standard Cab Pickup
2 Doors

1 Per Vehicle

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