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Gallery Henry's 2004 GMC Sierra 1500 Regular Cab with Shocker XL Train Horn install overview photo 1
Shocker XL Train Horn kit hardware staged for Henry's GMC Sierra regular cab gallery install photo 2
Train horn bells and bracket mounting on Henry's 2004 GMC Sierra 1500 Regular Cab photo 3
Air line routing for Shocker XL Train Horn on Henry's Sierra Regular Cab photo 4
Air tank or compressor placement in Henry's 2004 GMC Sierra Regular Cab photo 5
Completed Shocker XL Train Horn installation on Henry's 2004 GMC Sierra 1500 Regular Cab photo 6
01 / 07
Video
Progress
Gallery Henry's 2004 GMC Sierra 1500 Regular Cab with Shocker XL Train Horn install overview photo 101
Gallery Henry's 2004 GMC Sierra 1500 Regular Cab with Shocker XL Train Horn install overview photo 102
Shocker XL Train Horn kit hardware staged for Henry's GMC Sierra regular cab gallery install photo 203
Train horn bells and bracket mounting on Henry's 2004 GMC Sierra 1500 Regular Cab photo 304
Air line routing for Shocker XL Train Horn on Henry's Sierra Regular Cab photo 405
Air tank or compressor placement in Henry's 2004 GMC Sierra Regular Cab photo 506
Completed Shocker XL Train Horn installation on Henry's 2004 GMC Sierra 1500 Regular Cab photo 607
Featured Install

Shocker XL Train Horn

Gallery / Henry's 2004 GMC Sierra 1500 Regular Cab

Sound Sample
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Owner Gallery
Year 2004
Vehicle Henry's 2004 GMC Sierra 1500 Regular Cab

Henry’s 2004 GMC Sierra 1500 Regular Cab is a perfect example of how serious horn enthusiasts adapt and upgrade to keep the sound alive—no matter the lifestyle. Originally mounted in the toolbox, Henry's Shocker XL Train Horn Kit found a new home when he transitioned from towing a 5th wheeler to adventuring with a Bigfoot camper.

To make room, he relocated the compressor and expansion tank to the right front corner of the truck bed, drilled through for the high-pressure air line, and mounted the Shocker XL horns directly on the frame, facing forward. Not only did this keep the horns intact during camper mode, but according to Henry, they now sound even louder than before.

Whether he's cruising or camping, these horns are an essential part of the experience, and they’re turning heads everywhere he goes.


Key Features:

  • Shocker XL Train Horns – Hand-tuned for a deep, locomotive-quality blast

  • Frame-Mounted Forward Setup – Durable placement that boosts sound projection

  • Right-Side Bed Air System – Custom relocation of compressor and tank

  • RV-Ready Configuration – Optimized layout to accommodate Bigfoot camper

  • Endless Reactions – Everyone who hears them wants a set of their own


A WORD FROM THE OWNER

Yep, its been quite a while and I have since mounted the horns in a different location; Sold my 5th wheeler and bought a Bigfoot camper. With the camper, I have to remove my toolbox, so I would loose the whole horn installation. I can't live without these horns in RV-mode, anymore. So, I moved the compressor and expansion tank to the right front side of the truck bed, drilled a hole for the high pressure line and mounted the horns on the frame, right under it. Horns are getting dirty now but facing forward, they seem to sound even louder. Everyone I talk to, who hears them, wants them too!

Have a nice day!

Henry

HornBlasters Shocker S6 544K Nightmare Edition Train Horn Kit

PRODUCT

PRICE

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HornBlasters Shocker S6 544K Nightmare Edition Train Horn Kit

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UP TO 1500% LOUDER

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UNLIMITED HONKING

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ZERO
DELAY

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CAPABLE ONBOARD AIR SYSTEM

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SET UP YOUR CAMPER-FRIENDLY SHOCKER XL LIKE HENRY

Get the Shocker XL horns and mount them where they work best for you. Keep your gear, keep your camper, and keep that unmistakable train horn sound.

SPECIFICATIONS

Part Number AH-S4
Voltage 12-Volt DC
Horn Shocker 4 Train Horn Kit
Material High-Impact ABS
Horn Measurements Bell #1 19.50″ (495.30 mm)
Bell #2 16.25″ (412.75 mm)
Bell #3 14.75″ (374.65 mm)
Bell #4 12.75″ (323.85 mm)
Flare 5″ (127 mm)
Weight 4.5 lb (2.04 Kg)
Fitting Size ⅛″ M NPT
Requires 1/2" Port
Train Horn FAQ

Shocker XL is a horns-only, four-bell train horn designed for authentic locomotive sound and flexible, separate-bell mounting.

No. Shocker XL Train Horn is horns-only. Pair with a compatible air tank, compressor, hoses and fittings, and wiring to operate. Prefer a complete kit? Check out our Conductor's Special Train Horn Kit that use Shocker XL Train Horn here.

Yes. Each bell can be mounted individually to optimize space and sound projection for your specific installation.

Max 150 PSI, ⅛" M NPT inlet, high-impact ABS construction, bell lengths 19.50", 16.25", 14.75", 12.75" with 5" flares.

Common locations include the bed, frame rails, or underbody brackets. Choose spots with airflow, protection, and short hose runs.


Who’s ready to take their setup to the next level like Henry? Click the button below to submit your install photos to our media submission form!

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Gallery / Henry's 2004 GMC Sierra 1500 Regular Cab Train Horn Install with Shocker XL