Air Spring Kit with 1.5-Inch Spacers for Silverado/Sierra HD
- Kit contents: rear air spring kit plus a 1.5-inch air spring spacer set
- Silverado and Sierra 2500 HD/3500 HD, 2020–2025, 4WD and RWD
- Excluded: rear sway bar equipped trucks and frame-side-mounted 5th wheel hitches
- Headlight adjustment brackets included for 2021 trucks with headlight actuators
- Minor drilling required; downloadable installation guide available
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✓ Fits
Does NOT increase towing capacity. Minor drilling required. Fitment on this page is based on the manufacturer’s application data.
About this kit
Air Spring Kit with 1.5-Inch Spacers, fitment-checked
Rough Country 100345 pairs the 10034 rear air spring kit with a 1.5-inch air spring spacer set in one box. It covers 2020–2025 Silverado 2500 HD and 3500 HD and Sierra 2500 HD and 3500 HD in 4WD and RWD. Trucks with a rear sway bar or a frame-side-mounted 5th wheel hitch are excluded, and minor drilling is part of the install.
Two components make up this kit: the GM heavy-duty rear air spring assembly and a 1.5-inch spacer kit. Fitment runs 2020 through 2026 across Silverado 2500 HD and 3500 HD — WT, Custom, LT, LTZ, High Country, ZR2 — and the Sierra equivalents from Pro to Denali Ultimate. Check two exclusions first: rear sway bar, and frame-side-mounted 5th wheel hitch. Minor drilling is required. On 2021 trucks with headlight actuators, the front and rear headlight adjustment brackets in the kit come into play.
What’s in the box
Kit contents
- 1× Air Spring Kit 10034$349.95
- 1× Air Spring Spacer Kit 10022$49.95
Priced components are sold separately here, so a worn shock or arm can be replaced on its own later.
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 100345 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 100345 |
| UPC / GTIN | 00840269939563 |
| Shipping weight | 42 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Air Suspension |
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