Reviews — Brand Hub

Grand General Train Horns

Class 8 truck accessories specialist. Triple-chrome-plated brass trumpets, 12/24V multi-voltage, marketed primarily to semi-truck and commercial vehicle buyers — not the SUV / pickup aftermarket that HornBlasters and Vixen target.

By Train Horn Editorial Published April 28, 2026

Pink semi-truck with tall chrome exhaust pipes — Class 8 cab context for Grand General brass + chrome trumpets

About Grand General

Grand General is an auto parts and accessories manufacturer specializing in chrome and stainless components for commercial trucks. The company's train horn line targets Class 8 semi-trucks, freightliners, Peterbilt / Kenworth / Mack tractors, and other commercial vehicles. The aesthetic emphasis (chromed brass, mirror finish) reflects this — Grand General products are designed to be visible accessories, not hidden installs.

Compared to the SUV / pickup-focused HornBlasters / Kleinn / Vixen aftermarket, Grand General trumpets are larger, heavier, and engineered for 24V truck electrical systems as well as 12V. The flagship 69991 is a 3-trumpet brass horn that mounts to a 50mm-thick stainless steel L-bracket — overkill for a pickup but appropriate for a Class 8 cab roof.

Grand General models

GG 69991 — Heavy Duty Deluxe Train Horn, 3 chromed brass trumpets, 140 dB, 12V/24V multi-voltage, 70-140 PSI operating range, 18" × 13.5" × 13.75" footprint (Amazon, Grand General product page)
"Little General" — compact chrome air horn, smaller footprint, lower output (Chrome Country)
GG 69977 / 69979 / 69982 — Floor mount stand & air valve lever sets in 4", 7", 11" lengths (cab-mounted manual control accessories)
GG 69993 — Heavy duty electric solenoid valve replacement

What makes Grand General different

Chromed brass trumpets. Brass is acoustically warm and corrosion-resistant; triple-chrome plating gives the mirror finish that semi-truck operators want. Most aftermarket horns use aluminum or fiberglass-reinforced ABS — Grand General's brass is heavier, more expensive, and visually distinctive.
50 mm stainless L-bracket. The mounting hardware itself is heavy-duty — it won't flex or vibrate under highway use the way thinner steel brackets can.
12V / 24V multi-voltage. Class 8 trucks frequently run 24V electrical systems (Internationals, certain Volvo VNL trims). Grand General's solenoid is rated for both — no need for a step-down converter.
Floor-mount manual valve. Many Grand General buyers run the manual lever in the cab (the brass-and-wood pull-handle aesthetic), not just an electric horn button. The floor stands are sold separately as accessories.
Heritage aesthetic. Grand General products evoke 1970s–80s long-haul trucker culture — Peterbilt 379 cab roof, polished aluminum tank, manual horn pull. HornBlasters' modern fiberglass aesthetic doesn't replicate this.

Output reality

The 69991 is rated at 140 dB+ per Grand General. Independent measurement methodology isn't published, but the heavy brass + 70-140 PSI air supply combination is consistent with this output range. Realistic output:

69991 Heavy Duty — ~140 dB at 3 ft is plausible given the brass trumpet build and high-PSI air system
Little General — significantly lower, ~125–130 dB realistic given smaller trumpet size

Grand General doesn't ship complete air systems (tank + compressor) with most models. The 69991 is sold as horn-only — buyers add their own air system. This positions Grand General differently from HornBlasters / Vixen / Vevor, which sell complete onboard kits.

Where Grand General fits in the market

Class 8 truck cab roof installs — primary target market
Show trucks / customs — chrome brass aesthetic is the differentiator
Existing-air-system upgrades — buyers who already have a Viair compressor + 5-gallon tank from a prior install
Heritage / vintage truck restorations — period-correct look for 1970s-80s trucks

For a typical pickup or SUV install with no pre-existing air system, HornBlasters Conductor's 228H or Vixen VXO8805/3311B offer better value as complete kits. Grand General's premium brass trumpets are for buyers who specifically want that visual.

Chrome truck mirror — Class 8 / semi-truck cab aesthetic Grand General targets with brass-trumpet kits

Where to buy

GrandGeneral.com — direct sales
Amazon — 69991 widely available with Prime
Iowa 80 (truck stop / accessories)
Raney's Truck Parts
Berube's Truck Accessories
Chrome Country (Little General)

Air compressor close-up — separate air system needed since Grand General sells horn-only

Sources

We do not perform hands-on testing — see our methodology. The 140 dB manufacturer claim isn't independently verified with published testing methodology; we treat it as plausible given the brass trumpet build and PSI range.