1988–1998 Chevrolet / GMC C1500 K1500 Rear Lift Blocks – 4", 5", 6", 7", 8" Compound Taper Anti-Wrap
1988–1998 Chevy/GMC C1500 K1500 Rear Lift Blocks – Now with 5" & 7" Options!
Add reliable, true-to-size rear lift to your classic 1988–1998 Chevrolet Silverado or GMC Sierra 1500 with Apoc Industries' premium USA-made lift blocks. Now available in 4", 5", 6", 7", and 8" heights, these heavy-duty steel blocks deliver the perfect stance for larger tires, level your truck after a front lift, or improve towing/hauling capability — all while keeping your axle centered and your drivetrain protected.
🚀 Why Choose Apoc Compound Taper Lift Blocks?
- Exclusive Compound Taper Technology — The first lift blocks of their kind! The top taper perfectly matches your factory OEM leaf spring angle for secure seating, while the bottom taper maintains optimal pinion angle at your chosen lift height. No more axle push-back, wheel misalignment, or driveline vibrations common with standard blocks.
- Heavy-Duty Construction — Precision-cut heavy wall steel with reinforced design and robotic welds for zero flex and maximum strength.
- Black Powder Coated Finish — Superior rust and corrosion protection for years of reliable service.
- Center Pin Locator Holes — Ensures precise axle positioning and easy installation.
- Proudly Made in the USA 🇺🇸 — Built by American manufacturers who understand your truck.
Includes: Pair of lift blocks (2). Extended U-bolt kits available separately.
✅ Key Fitment & Important Notes
- Vehicle Fitment: 1988–1998 Chevrolet C1500 / K1500 & GMC C1500 / K1500 (2WD & 4WD models with leaf spring rear suspension)
- ⚠️ Extended U-bolts REQUIRED — Factory U-bolts will NOT work with increased block height. Measure the difference and select matching extended main U-bolts (optional Anti-Wrap U-bolts recommended for heights over 6").
- ⚠️ Professional installation strongly recommended. Always verify pinion angle, driveline angles, and proper alignment after install to prevent vibrations or wear.
- Not for front suspension use. Single block only — do not stack.
- True-to-Size Lift — Listed height = actual lift achieved.
Ideal For:
- Leveling rear stance after front suspension lift
- Fitting larger off-road tires with proper clearance
- Improving aesthetics, towing stability, and light hauling
- Daily drivers, weekend warriors, and serious off-road builds
Related Apoc Industries Products & Resources
- Compound Taper Anti-Wrap Lift Blocks Explained – Why They’re Better
- Pinion Angle Guide: Fix Driveline Vibrations on Lifted Trucks
- Ladder Bars for Superior Stability on Lifted Trucks (Highly recommended with taller blocks to prevent axle wrap)
Built Right. Backed Right. Our crew is here Monday–Friday 9–5 EST at 865-983-5004 for real support on your build.
Ready to level up your classic square body? Add the new 5" and 7" options to your cart today and experience the difference that true compound taper engineering makes!
Built Right. Backed. Right
Our crew’s on call Monday–Friday, 9–5 EST. Hit us up at 865-983-5004 — real support, done right.
First with Compound Tapers. Built to Stay Centered
Built Better, Not Cheaper. Period
Compound Taper Technology
Apoc Anti-Wrap Lift Blocks are the first ever with exclusive compound tapers. The top taper matches your factory OEM leaf spring angle for perfect seating, while the bottom taper maintains proper pinion angle at your chosen lift height.
The Problem with Standard Blocks
Most lift blocks only correct pinion angle and ignore the leaf spring angle. The taller the block, the further back they push your axle — throwing wheels off-center in the fenders and over-extending your driveshaft, which can damage your transfer case.
Benefits of Apoc Anti-Wrap Lift Blocks
Our heavier-duty steel construction with precision robotic welds delivers zero flex and maximum strength. The anti-wrap geometry keeps your axle centered, protects your drivetrain, and provides a stable ride — perfect for serious off-roaders, daily drivers, and tow vehicles.
FAQ'S
Lift Blocks
Here are some of the most common questions we receive about lift blocks, installation, and related components. Our goal is to help you make the best decision for your build with clear, practical information.
A: Yes. Apoc lift blocks are true to size—the height listed is the actual block height, providing that exact amount of rear lift when installed. For example, a 3" block adds 3" of lift over your current leaf spring height.
A: Apoc lift blocks are vehicle-specific and engineered to match your truck’s factory leaf spring setup. The alignment hole and center pin locations are precisely positioned to match OEM specs, ensuring a secure, direct fit with no modifications required.
The main U-bolts are required to secure the axle and block assembly to your leaf springs. You do not have to purchase them from us if your existing U-bolts are long enough. However, if you are changing the size of your lift block, you will need longer U-bolts. Simply measure the difference in height between your current block and the new block — your new U-bolts will need to be that much longer than your current ones.
Anti-wrap U-bolts are optional. They are designed to secure the wider footprint of the block more firmly to the leaf spring, helping to reduce axle wrap, spring twist, and wheel hop. The taller the block, the more beneficial anti-wrap U-bolts become. For block heights over 6 inches, we recommend also installing ladder bars for added stability and to prevent driveline issues.
A: Standard blocks provide basic lift, while anti-wrap blocks feature a wider footprint and additional bracing to reduce axle wrap and wheel hop—especially important for lifted trucks with big tires or high torque output.
A: No, stacking lift blocks is not recommended and can be dangerous. It compromises stability, increases the risk of axle shift, and can cause premature wear or failure of suspension components. Always use a single, properly sized Apoc lift block for safe, reliable performance.