JL Audio
JL Audio SBX-GM-SLVCC4/12TW3 12" Stealthbox 800W 2Ω Silverado Sierra Crew Cab 010-04652-00
JL Audio SBX-GM-SLVCC4/12TW3 12" Stealthbox 800W 2Ω Silverado Sierra Crew Cab 010-04652-00
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***This item will have an additional 8-10 days handling time***
JL Audio SBX-GM-SLVCC4/12TW3 Stealthbox® Enclosed Subwoofer is a vehicle-specific under-seat bass system designed for Chevrolet Silverado and GMC Sierra Crew Cab trucks. This custom down-firing sealed enclosure fits neatly beneath the rear seat and comes preloaded with two 12TW3-D8 thin-line 12" subwoofers, delivering serious low-end output without giving up rear leg room or seat function.
This Stealthbox is rated for 800 W RMS and wired for a 2 Ω final load, making it a strong foundation for high-output truck builds that still need a clean OEM-style install. It fits Silverado/Sierra 1500 Crew Cab 2019-up and 2500/3500 Crew Cab 2020-up models, installs under the rear seat, and leaves a centered area on the enclosure for a clean hidden amplifier installation.
Key Features
- Vehicle-specific JL Audio Stealthbox® for select Chevrolet Silverado and GMC Sierra Crew Cab trucks
- Preloaded with dual 12TW3-D8 thin-line 12" subwoofers
- 800 W RMS continuous power handling
- 2 Ω mono final impedance
- Custom down-firing sealed enclosure mounts under the rear seat
- Will not affect rear seat folding or rear leg room
- Includes mounting hardware and brackets
- Dedicated center area on enclosure supports a clean hidden amplifier install
Vehicle Fitment
- Chevrolet Silverado 1500 Crew Cab: 2019-up
- GMC Sierra 1500 Crew Cab: 2019-up
- Chevrolet Silverado 2500/3500 Crew Cab: 2020-up
- GMC Sierra 2500/3500 Crew Cab: 2020-up
- Installation location: under rear seat
- Does not fit non-Crew Cab trucks
Recommended Amplifier Matching (Sold Separately)
For best performance, pair this Stealthbox with a JL Audio monoblock amplifier capable of delivering clean power into the correct load:
- JL Audio HD750/1 – strong near-target match for an 800 W / 2 Ω Stealthbox system
- JL Audio RD1000/1 – gain-limited headroom option for 2 Ω truck systems
- JL Audio XDM1000/1 – compact 2 Ω headroom option well-suited for hidden amplifier mounting
Technical Specifications
| Model | SBX-GM-SLVCC4/12TW3 |
| Garmin PN | 010-04652-00 |
| Supersedes Garmin PN | 010-03686-00 |
| Supersedes JL Model | SB-GM-SLVCC4/12TW3/BK |
| UPC | 699440948340 |
| Subwoofer Configuration | Dual 12" thin-line subwoofers |
| Drivers | Two 12TW3-D8 thin-line 12" subwoofers |
| Continuous Power (RMS) | 800 W |
| Nominal Impedance | 2 Ω mono |
| Enclosure Type | Down-firing sealed enclosure |
| Installation Location | Under rear seat |
| Vehicle Fitment | Silverado/Sierra 1500 Crew Cab 2019-up; Silverado/Sierra 2500/3500 Crew Cab 2020-up |
| Package Dimensions (L x W x H) | 58.3" x 28.3" x 14.6" |
| Package Weight | 80.2 lb |
| Country of Origin | Made in the U.S. with global components |
| Warranty | 2 Years (authorized dealer purchase) |
Ideal Applications
- Silverado and Sierra Crew Cab builds needing real low-end authority without losing cabin space
- Truck systems that need hidden under-seat bass with no rear-seat compromise
- High-output daily-driver systems using a proper 2 Ω monoblock
- Installations where stealth appearance and clean packaging matter
What’s Included
- JL Audio SBX-GM-SLVCC4/12TW3 Stealthbox® enclosed subwoofer
- Preloaded dual 12TW3-D8 subwoofers
- Mounting hardware
- Brackets
- Documentation
Why Buy From MCOR Automotive
- Authorized JL Audio dealer
- Support for amplifier selection, output goals, and installation planning
- Real-world truck audio experience with clean OEM-style integration
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