Body Armor 4x4

1" Block and U-Bolt Kit on Silverado and Sierra: Buying Guide

1" Block and U-Bolt Kit on Silverado and Sierra: Buying Guide

By Body Armor 4x4 | Published: 2026-11-03

Category: Guide all'acquisto

Decide if a 1-inch rear block and U-bolt kit fits your Silverado or Sierra 1500. Check leaf pack style, 2WD/4WD, and clearance trade-offs before buying.

Quick answer

Buy a 1-inch block and U-bolt kit only if your Silverado or Sierra 1500 has a standard leaf pack with square U-bolts. If you have a mono-leaf with a round top plate, skip this kit and look for a mono-leaf-specific solution.

Why 1 inch is a fitment decision, not just a height number

A 1-inch rear block is a small change, but it still changes how the leaf pack sits and how the U-bolts clamp. The most common buying mistake is ordering by truck name alone. Two Silverado 1500s from the same year can have different leaf pack designs, and the block and U-bolt hardware must match the pack you actually have.

This kit is listed for 2007–2013 and 2019–2024 GMC Sierra 1500 and Chevrolet Silverado 1500 2WD/4WD. That coverage is broad, but it does not mean every leaf pack in those years is compatible. The catalog note is specific: it fits a standard leaf pack with square U-bolts only. It does not fit a mono-leaf with a round top plate and U-bolts.

The trade-off: stock ride quality versus clearance

The main reason to choose a 1-inch block over a taller block is to keep the rear close to stock. The catalog describes this kit as preserving stock ride quality and allowing a quick return to stock. That matters if you tow, haul, or use the truck daily and do not want a permanently altered rear stance.

The trade-off is that 1 inch is modest. It can help clear larger wheels and tires, but it will not create a dramatic lift. If your goal is a noticeable height increase, a 1-inch block may leave you wanting more. If your goal is a small correction or extra clearance without changing the truck’s character, this is the right size to consider.

Clearance-item caveat: no returns or warranty

This product is listed in the CLEARANCE category, and the catalog states no return or warranty on clearance items. That makes pre-purchase fitment checks more important than usual. Measure and identify your leaf pack before ordering, because you cannot rely on a return if the hardware does not match.

The catalog also mentions an armor guard warranty, but that should not be confused with a general return policy. Treat the clearance status as the controlling term: once you buy, the fitment decision is yours.

Decision rules before you buy

  • Check your leaf pack style first: Look at the rear leaf pack. If it is a standard pack with square U-bolts, this kit is a candidate. If it is a mono-leaf with a round top plate and U-bolts, do not buy this kit. Snap a photo of your leaf pack and U-bolt shape before ordering.
  • Confirm your truck is covered: The catalog lists 2007–2013 and 2019–2024 GMC Sierra 1500 and Chevrolet Silverado 1500 2WD/4WD. If your truck falls outside those years or is a different model, this kit is not the right starting point.
  • Decide if 1 inch meets your goal: Choose this kit if you want a small rear height change, stock-like ride quality, and the ability to return to stock. If you want a visibly lifted rear or plan to run a much larger tire, a 1-inch block may not deliver enough clearance. Measure your current rear height and your target clearance before buying.
  • Accept the clearance terms: This is a clearance item with no return or warranty. Only order once you have verified the leaf pack and U-bolt style. If you are unsure, do not buy on the assumption that you can return it.

Product facts to check

Who this kit is for

Best for

  • Owners of 2007–2013 or 2019–2024 Silverado/Sierra 1500 2WD/4WD with a standard leaf pack and square U-bolts
  • Drivers who want a modest rear height change while keeping stock ride quality and the option to return to stock

Not for

  • Trucks with a mono-leaf rear spring and round top plate/U-bolts
  • Owners who want a large rear lift or cannot verify their leaf pack style before purchase

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