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Skyjacker BUK4589 4.5 Inch Rear Lift Block and U-Bolt Kit

(Chevrolet Blazer 1973-91, K10 Pickup 1973-86, K10 1973-86, K5 Blazer 1975-86, K20 1973-86, K20 Pickup 1973-86, V20 1987, K10 Suburban 1973-86 + 13 more models)

Manufacturer

Picture for manufacturer Skyjacker Suspension

Part Number

BUK4589
6 reviews
Sale Price

$150.44

In Stock (10+)

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Skyjacker BUK4589 is a 4.5-inch rear lift block and U-bolt kit designed to provide increased ground clearance and a more aggressive stance. This complete kit utilizes heavy-duty ductile iron lift blocks with fixed center pins that are specially tapered to correct pinion angle and prevent driveline vibrations during operation.

Key Features:

  • 4.5-inch rear lift height for improved ground clearance
  • Ductile iron blocks with fixed center pins for secure positioning
  • Tapered design corrects pinion angle and eliminates driveline vibration
  • E-coated U-bolts provide superior corrosion resistance
  • Complete kit includes all necessary blocks and U-bolts for installation

Important Installation Notes:

  • Cannot reuse OEM wheels with this lift height
  • Requires wheels with minimum 4-inch backspacing
  • Minor modifications may be required on Duramax models
  • For rear add-a-leaf applications, order PN R3820 (not PN BUK2082)

Skyjacker has been engineering premium suspension components since 1974, delivering field-proven performance for off-road enthusiasts who demand quality and reliability. This block and U-bolt kit is manufactured to exacting standards to ensure proper fit and long-lasting durability in the harshest conditions.

Products specifications

Fits

Chevrolet Blazer 1973-91, K10 Pickup 1973-86, K10 1973-86, K5 Blazer 1975-86, K20 1973-86, K20 Pickup 1973-86, V20 1987, K10 Suburban 1973-86, V10 Suburban 1987-88; GMC K1500 1979-86, K2500 1979-86, Jimmy 1973-91 + 9 more models

Block Material

Cast iron

Block Thickness (in)

4.50 in.

Quantity

Sold as a kit.

U-Bolts Included

Yes

Lift/Drop Height

4.5 in.

Prop 65

Yes

Found this store thru a google search. Had good reviews so I went for it. Liked that they have google checkout. Email notification was great, tracking number was there. Last but not least they had the best price for my Airaid intake tube.

Nice easy part searches; fast and accurate results.

We ordered a Thule 9003 Raceway 2-bike rack for my 2011 Honda Civic and it arrived in 2 days. We were very surprised at the fast service. I also had my thoughts that it wouldn't be the exact name brand product I was looking for and a off brand but the same type and I have to say it was exactly the product I wanted. The price was great too. I researched several dealers and Autoplicity was the lowest price at $100 less than others and that included the shipping. I would definitely order from Autoplicity again.

Excellent service, incredibly fast shipping and delivery. Would DEFINITELY do business with again.

Ordered a Thule Bike Rack from Autoplicity and was greatly pleased with the price. It was the best on the internet. There was an issue with the shipment of the item and some confusion but this was resolved in a professional manner by a customer service manager. Overall, I'm pleased I got a deal.

I have had a very good experience with Autoplicity and will look for more parts here. I called Customer Service and they were very good and accurate with me. It was easy, they were very nice, immediate response, and great price.

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