Description

Established in 1975, Superlift remains a pioneer in the industry, and is one of the few suspension companies operated by true truck and off-road enthusiasts. We are passionate about trucks, wheeling and an outdoor lifestyle that go hand-in-hand. We can talk the talk because we walk the walk.This question.... ''What's best for the customer?''... is always at the top of our list in everything we do, from product planning and design to customer service. This simple guiding principal has served us well for decades, and will continue to guide us into the future.We are proud to provide the truck, Jeep and SUV owner products that perform better than advertised. We understand that most people spend the majority of their windshield time on-road, and our designs reflect this. You will be 100% satisfied with our products on-road or off - we guarantee it! Determining what product is right for your vehicle and lifestyle can be a complicated task, especially with so many companies and options to choose from. We urge you to carefully research your purchase. Most lift kits represent a considerable investment, and you will literally live with your choice for years. Talk to fellow off-roaders, and your local automotive specialty shop before making a purchase. We love to talk shop, and we encourage you to give our tech staff a call. Bottom line... if you do your homework, you'll discover that we've done ours.

Product Overview

Established in 1975, Superlift remains a pioneer in the industry, and is one of the few suspension companies operated by true truck and off-road enthusiasts. We are passionate about trucks, wheeling and an outdoor lifestyle that go hand-in-hand. We can talk the talk because we walk the walk.This question.... ''What's best for the customer?''... is always at the top of our list in everything we do, from product planning and design to customer service. This simple guiding principal has served us well for decades, and will continue to guide us into the future.We are proud to provide the truck, Jeep and SUV owner products that perform better than advertised. We understand that most people spend the majority of their windshield time on-road, and our designs reflect this. You will be 100% satisfied with our products on-road or off - we guarantee it! Determining what product is right for your vehicle and lifestyle can be a complicated task, especially with so many companies and options to choose from. We urge you to carefully research your purchase. Most lift kits represent a considerable investment, and you will literally live with your choice for years. Talk to fellow off-roaders, and your local automotive specialty shop before making a purchase. We love to talk shop, and we encourage you to give our tech staff a call. Bottom line... if you do your homework, you'll discover that we've done ours.

Features and Benefits

• Component Box

Product Details

Description:	COMP BOX FRT GM 99-06 6in.
Lift/Drop Height:	6 in.
Part Number:	slf3377
WARNING CA Proposition 65 Message:	WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
WARNING CA Proposition 65:	Yes

Kit Options

This item is available as a full kit.
Select a kit option in the following table if you are looking for this item in a bundle form with all associated components.

Kit option/s:

Thumb	SKU	Kit Title
	slfK121	Superlift 99-06 Chevy Silv/GMC Sierra 1500 4WD 6in Lift Kit - Knuckle Kit w/ Superlift Shocks (1x slf3859, 1x slf3376, 1x slf3377, 1x slf3378-1, 1x slf84027)
	slfK121B	Superlift 99-06 Chevy Silv/GMC Sierra 1500 4WD 6in Lift Kit - Knuckle Kit w/ Bilstein Shocks (1x slf3859, 1x slf3376, 1x slf3377, 1x slf3378-1, 1x slf84028)
	slfK123	Superlift Suspension Lift Kits for 2000-2006 SUBURBAN 1500, TAHOE, YUKON - K123 Lift, Chevy, GMC, Kit
	slfK123B	Superlift 00-06 Chevy Tahoe/GMC Yukon 4WD 6in Lift Kit - Knuckle Kit w/ Bilstein Shocks (1x slf3315, 1x slf3376, 1x slf3377, 1x slf3379-1, 1x slf84030)

Data: v4.2 - Upd: 2026-10-13 23:57:34

Features

Specifications

Product Attributes - Brand

Superlift Suspension

Product Attributes - Manufacturer's Part Number

3377

Product Attributes - Part Type

Suspension Lift Kit Components

Product Attributes - Product Line

Superlift Suspension Lift Kit Components

Product Attributes - UPC

804260097592

Product Attributes - Front Shocks/Struts Included

No

Product Attributes - Rear Shocks/Struts Included

No

Product Attributes - Brake Lines Included

No

Product Attributes - Hardware Included

No

Product Attributes - Designed for Kit Part Number

K121

Product Attributes - Quantity

Sold as a kit.

Product Attributes - Notes

Comes with front differential brackets, front crossmember, and skid plate.

Compatibility