- +Compact 11.5-inch footprint fits where full-size clusters won't
- +All-metal chrome-plated trumpets at a budget price
- +Electric solenoid valve and mounting hardware included
- +12V/24V compatible for pickups and heavy trucks
- +Wide 70-120 PSI operating range suits existing air systems
- −120 dB claim has no disclosed test distance
- −No published chord frequencies or weight
- −Only a 6-month limited warranty
- −Horn-only — compressor, tank, and line cost extra
- −Hose spec changed between production runs (5/16 in vs 1/4 in)
Methodology
This review aggregates publicly available information from manufacturer specifications, retailer listings, and verified user reviews. We do not perform hands-on testing. Last reviewed: July 2, 2026. Specs below were cross-checked against Grand General’s official product page and five independent truck-parts retailers; every URL we used is listed in the Sources section at the end.
Quick verdict
The Grand General 69988 Little General is a compact, all-chrome 3-trumpet air horn built for trucks and pickups that don’t have room for a full-length train horn cluster. At roughly $99–$126 street price it undercuts most name-brand triple-trumpet setups while still running on a proper 70–120 PSI air system with an included electric solenoid. We rate it 3.5/5: honest hardware at a fair price, held back by thin acoustic disclosure (no test distance for the 120 dB claim, no published chord frequencies) and a short 6-month warranty. If you want maximum volume, this isn’t it — if you want real air-horn sound in a tight engine bay, it’s a sensible pick.
What it is
The Little General (SKU 69988) is a three-trumpet, chrome-plated air horn from Grand General, a Los Angeles-area manufacturer and distributor of truck parts and accessories that has been supplying the semi-truck chrome shop market for decades. Grand General’s own page tags it a “Top Seller,” and the name tells you the positioning: it’s the little brother of the brand’s 69991 Deluxe Heavy Duty train horn, shrunk to an 11-1/2 in footprint so it can fit behind a grille, under a bed rail, or on a pickup frame rail where a 20-plus-inch trumpet cluster physically won’t.
This is a horn-only product, not a complete kit. It ships with the trumpet assembly, an electric solenoid valve, and mounting hardware — you supply the air. That means it’s aimed at three buyers: semi drivers who already have truck air on board, pickup owners who already run onboard air (train horn tank, air-bag compressor system), and anyone building a compact system who wants to choose their own compressor and tank rather than pay for a bundled one.
Specifications
| Spec | Value |
|---|---|
| Model / SKU | Grand General 69988 “Little General” |
| Configuration | 3 trumpets, single-piece cluster |
| Sound output | 120 dB, per retailer listings (test distance not disclosed) |
| Operating pressure | 70–120 PSI |
| Dimensions | 11-1/2 in L × 6-1/2 in W × 6-3/8 in H |
| Air line | 1/4 in I.D. hose (earlier production called for 5/16 in I.D.) |
| Valve | Electric solenoid valve, included |
| Voltage | 12V/24V |
| Material | Chrome-plated trumpets |
| Chord frequencies | Not disclosed |
| Weight | Not disclosed |
| Warranty | 6 months limited (per Grand General) |
| Street price | $99–$126 |
Two disclosure gaps worth flagging. First, the 120 dB figure appears on retailer listings without a measurement distance, so treat it as a marketing number rather than a comparable spec — our guide to decibel ratings explains why distance changes everything. Second, Grand General publishes no frequency data, so we can’t tell you what chord it plays; user demos describe a classic semi-truck blast rather than a locomotive-style minor chord.
Note the hose spec: KNS Accessories’ listing states the current version requires 1/4 in I.D. hose and that earlier units used 5/16 in — if you’re matching an older install, measure before ordering fittings.
What’s in the box
- Chrome 3-trumpet horn assembly (single mounting base)
- 12V/24V electric solenoid valve
- Mounting hardware
- Color display box (sold by each)
No compressor, tank, air line, switch, or relay is included — budget for those separately if you don’t already have onboard air. Our air line sizing guide and compressor buying guide cover what pairs well with a small horn like this.
Pros
- Genuinely compact: 11-1/2 in long fits engine bays and frame rails that can’t take full-size train horn clusters
- All-metal, chrome-plated construction at a budget price
- Electric solenoid valve included — many horn-only competitors make you buy the valve separately
- 12V and 24V compatible, so it works on pickups and heavy trucks alike
- Wide 70–120 PSI operating window plays nicely with existing truck air systems and aftermarket tanks
- Low street price for a metal triple-trumpet ($99–$126 across retailers we checked)
Cons
- 120 dB claim has no disclosed test distance, and 120 dB is modest by train-horn standards regardless
- No published chord frequencies, weight, or spec sheet on the public product page — Grand General hides details behind a dealer login
- Only a 6-month limited warranty, versus 1 year or more from Kleinn and HornBlasters
- Horn-only: total cost rises quickly if you don’t already have a compressor and tank
- Hose spec changed between production runs (5/16 in → 1/4 in), which can confuse replacement installs
Alternatives
- Viking Horns V101C-3/307B — another budget triple-trumpet, sold as a complete kit with compressor and tank; louder on paper (152 dB claim) but with the same test-distance ambiguity and bulkier packaging.
- Vevor 4 Trumpet — the rock-bottom budget path to a four-trumpet look; a complete kit at roughly the same street price as the horn-only Little General.
- Wolo Philly Express PRO 853-800 — a step up in disclosure: Wolo publishes frequencies and test conditions, and the PRO bundles an onboard air system.
More options in our best train horns under $200 roundup and the full Grand General reviews hub.
Install / compatibility notes
The Little General needs a real air supply — it is not an electric horn. Three common setups:
- Semi trucks: tee into the existing truck air system downstream of the protection valve. The 12V/24V solenoid wires like any accessory: fused power through a horn button or relay. Factory air pressure (typically 100–125 PSI) sits at the top of the horn’s rated range, which is where it will sound strongest.
- Pickups with onboard air: if you already run a train-horn tank or an air-suspension compressor with a port to spare, plumb 1/4 in line from the tank to the solenoid. At the 70 PSI floor the horn will blow, but users consistently report it sounds noticeably weaker — aim for 100+ PSI.
- Fresh installs: pair it with a small 1–2 gallon tank and a 120–150 PSI compressor. Because the trumpets are short and the line is 1/4 in, this horn doesn’t demand the big-bore plumbing a K5LA-style horn does — see our PSI guide and relay wiring guide for the details.
On sound character: aggregated user demos and retailer descriptions position the Little General as a sharp, high-pitched semi-truck blast rather than the deep locomotive chord you get from long-trumpet horns — short trumpets physically can’t reach those low fundamentals, which our trumpet tuning guide explains. Set expectations accordingly: this is an attention-getter for daily driving, not a novelty locomotive impression.
Mounting is a single-base bolt-up with the included hardware. Point the trumpet openings down or forward-and-down so they don’t collect water, and avoid mounting directly beside hot exhaust components. At 6-3/8 in tall it clears most pickup frame rails; measure the 11-1/2 in length against your chosen spot before ordering.
One legal reminder: a 120 dB horn used on public roads can still violate local noise rules. Check our city noise ordinance guide before you install.
Sources
- Grand General — 69988 Little General Air Horn product page — confirms the product exists and is current, SKU, box packaging, 6-month limited warranty, “Top Seller” status
- KNS Accessories — Little General Train Horn 69988 listing — dimensions, 70–120 PSI operating range, hose spec change (5/16 in old, 1/4 in new), sold-by-each packaging
- Horse & Buggy Chrome — Little General 69988 listing — 120 dB rating, PSI range, dimensions, 1/4 in hose requirement, $112.36 price point
- Chrome Country — Chrome Little General Air Horn listing — 120 dB rating, 70–120 PSI, dimensions, $99.00 price point
- Vehicle Safety Supply — Grand General 69988 listing — chrome-plated construction, 3-trumpet count, 12V/24V rating, $125.63 price point
- Iowa 80 — Little General Chrome Air Horns listing — confirms mounting hardware and solenoid valve included, 120 dB rating, 70–120 PSI, dimensions, $122.99 price point
- Grand General — About Us — company background: Rancho Dominguez (Los Angeles-area) manufacturer and distributor of truck accessories, established 1984
- Grand General — 69991 Deluxe Heavy Duty Train Horn product page — confirms the full-size 69991 model the Little General is derived from
- California DMV Commercial Driver Handbook — Section 5: Air Brakes — typical truck air-system pressures (compressor cut-in about 100 PSI, cut-out about 125 PSI)
Train Horn Hub aggregates publicly available data. We do not test products in-house. All trademarks belong to their respective owners.
A fairly priced, all-metal compact triple-trumpet for buyers who already have onboard air and need a horn that fits a tight space — not the pick if you're chasing maximum volume or full spec transparency.
Frequently asked questions
Quick answers to the questions people ask most about this topic.
- How loud is the Grand General 69988 Little General really?
- Retailer listings rate it at 120 dB, but no test distance is disclosed, so treat it as a manufacturer-side claim. That's loud enough to cut through traffic but well below the 140-150 dB claims of full-size train horn kits.
- Does the Little General 69988 come with a compressor or tank?
- No. It's a horn-only product that includes the chrome 3-trumpet assembly, a 12V/24V electric solenoid valve, and mounting hardware. You need an existing air source — truck air, an onboard air system, or a separate compressor and tank — delivering 70-120 PSI.
- What size air line does the Grand General 69988 use?
- Current production calls for 1/4-inch inside-diameter hose; earlier units were specified for 5/16-inch I.D. line. If you're replacing an older unit, check which fitting your existing plumbing uses before ordering.
- Will the 69988 work on a 12V pickup?
- Yes. The included solenoid valve is rated for both 12V and 24V, so it works on pickups and passenger vehicles as well as heavy trucks — as long as you have an air supply in the 70-120 PSI range on board.
- What warranty does Grand General offer on the Little General?
- Grand General's product page lists a 6-month limited warranty, which is shorter than the 1-year-plus coverage offered by brands like Kleinn or HornBlasters.
