ACDelco D1978D OE Replacement Horn
for 2005 Chevrolet Silverado 2500 HD

ACDelco D1978D OE Replacement Horn - 2005 Chevrolet Silverado 2500 HD


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 2005 Chevrolet Silverado 2500 HD. 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:

Decibel Rating:

105

Mount Type:

Bolt On With Bracket

Mounting Bracket Included:

Yes

Mounting Hardware Included:

Yes

Terminal Quantity:

Terminal Type:

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 2005 Chevrolet Silverado 2500 HD...

Last Updated: 11/05/2018

Years

Vehicle

Per Vehicle

Position

Fit Notes

Fitment Notes

2006

2005

2004

2003

Chevrolet Silverado 2500 HD

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 2500 HD

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

Chevrolet Silverado 2500 HD

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 2500 HD

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

Chevrolet Silverado 2500 HD

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 2500 HD

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

Chevrolet Silverado 2500 HD

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 2500 HD

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

Chevrolet Silverado 2500 HD

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 2500 HD

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

Chevrolet Silverado 2500 HD

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 2500 HD

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

Chevrolet Silverado 2500 HD

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 2500 HD

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

Chevrolet Silverado 2500 HD

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 2500 HD

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

Chevrolet Silverado 2500 HD

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 2500 HD

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

Chevrolet Silverado 2500 HD

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 2500 HD

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

2005

2004

2003

2005

2004

2003

Chevrolet Silverado 2500 HD

6.0L V8 CNG 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 2500 HD

6.0L V8 CNG 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

2005

2004

2003

2005

2004

2003

Chevrolet Silverado 2500 HD

6.0L V8 CNG 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 2500 HD

6.0L V8 CNG 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

2005

2004

2003

2005

2004

2003

Chevrolet Silverado 2500 HD

6.0L V8 CNG 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 2500 HD

6.0L V8 CNG 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

2005

2004

2003

2005

2004

2003

Chevrolet Silverado 2500 HD

6.0L V8 CNG 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 2500 HD

6.0L V8 CNG 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

2005

2004

2003

2005

2004

2003

Chevrolet Silverado 2500 HD

6.0L V8 CNG 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 2500 HD

6.0L V8 CNG 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

2005

2004

2003

2005

2004

2003

Chevrolet Silverado 2500 HD

6.0L V8 CNG 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 2500 HD

6.0L V8 CNG 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

2005

2004

2003

2005

2004

2003

Chevrolet Silverado 2500 HD

6.0L V8 CNG 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 2500 HD

6.0L V8 CNG 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

2005

2004

2003

2005

2004

2003

Chevrolet Silverado 2500 HD

6.0L V8 CNG 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 2500 HD

6.0L V8 CNG 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

2005

2004

2003

2005

2004

2003

Chevrolet Silverado 2500 HD

6.0L V8 CNG 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 2500 HD

6.0L V8 CNG 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

2005

2004

2003

2005

2004

2003

Chevrolet Silverado 2500 HD

6.0L V8 CNG 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 2500 HD

6.0L V8 CNG 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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2005 Chevrolet Silverado 2500 HD

ACDelco D1978D OE Replacement Hornfor 2005 Chevrolet Silverado 2500 HD

Product Information

Description:

Features and Benefits:

Specifications:

Manufacturer Warranty:

ACDelco D1978D OE Replacement Horn compatibility with your 2005 Chevrolet Silverado 2500 HD...

2005

2005

Chevrolet Silverado 2500 HD 6.0L V8 Gas OHV,6.6L V8 Diesel OHV Turbo,8.1L V8 Gas OHV

1

Right (Passenger)

Chevrolet Silverado 2500 HD

2005

2005

Chevrolet Silverado 2500 HD 6.0L V8 Gas OHV,6.6L V8 Diesel OHV Turbo,8.1L V8 Gas OHV

1

Right (Passenger)

Chevrolet Silverado 2500 HD

2005

2005

Chevrolet Silverado 2500 HD 6.0L V8 Gas OHV,6.6L V8 Diesel OHV Turbo,8.1L V8 Gas OHV

1

Right (Passenger)

Chevrolet Silverado 2500 HD

2005

2005

Chevrolet Silverado 2500 HD 6.0L V8 Gas OHV,6.6L V8 Diesel OHV Turbo,8.1L V8 Gas OHV

1

Right (Passenger)

Chevrolet Silverado 2500 HD

2005

2005

Chevrolet Silverado 2500 HD 6.0L V8 Gas OHV,6.6L V8 Diesel OHV Turbo,8.1L V8 Gas OHV

1

Right (Passenger)

Chevrolet Silverado 2500 HD

2005

2005

Chevrolet Silverado 2500 HD 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 BRACKETCab & Chassis2 Doors

Chevrolet Silverado 2500 HD

2005

2005

Chevrolet Silverado 2500 HD 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 BRACKETCab & Chassis4 Doors

Chevrolet Silverado 2500 HD

2005

2005

Chevrolet Silverado 2500 HD 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 BRACKETCrew Cab Pickup4 Doors

Chevrolet Silverado 2500 HD

2005

2005

Chevrolet Silverado 2500 HD 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 BRACKETExtended Cab Pickup4 Doors

Chevrolet Silverado 2500 HD

2005

2005

Chevrolet Silverado 2500 HD 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 BRACKETStandard Cab Pickup2 Doors

Chevrolet Silverado 2500 HD

2005

ACDelco D1978D OE Replacement Horn
for 2005 Chevrolet Silverado 2500 HD

Chevrolet Silverado 2500 HD

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

Chevrolet Silverado 2500 HD

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

Chevrolet Silverado 2500 HD

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

Chevrolet Silverado 2500 HD

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

Chevrolet Silverado 2500 HD

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

Chevrolet Silverado 2500 HD

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

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 2500 HD

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

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 2500 HD

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

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 2500 HD

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

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 2500 HD

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

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