Tuff Country 16711 - GM 73-87 6 1/2 ton box kit (systems with rear springs) User Manual
Torque settings
 
PART NUMBER : 16711 
1973 — 1987 CHEVY PICK UP & BLAZER 
1/2 TON 6” SUSPENSION SYSTEM 
FRONT AND REAR SPRING SUSPENSION SYSTEM 
 
PARTS LIST: 
 
Part 
#
Description
Qty.
5U-6109R
5/8” X 3 1/2” X 9 5/8” Round U-bolts
1
5U-3507R
5/8” X 3” X 7 5/8” Round U-bolts
7
58NW
5/8” High Nuts & Washers
2
GMSBNB1
Front Spring Eye Bolts
1
GMSBNB3
Rear Spring Eye Bolts
1
GMBLNB
Front & Rear Brake Line
Extensions
&
Hardware
1
89TC
Transfer Case Drop Kit
1
GMSB
Sway Bar Drop Kit
1
LUBE
Lube
Pack 2
16711INST Instruction
Sheet
1
INSTALLATION MANUAL
6” FRONT AND REAR SPRING
SUSPENSION SYSTEM
CHEVY PICKUP & BLAZER 1/2 TON
1973 —– 1987
PART # 16711
SJ052102
Congratulations on your selection to purchase a Tuff
Country EZ-Ride Suspension System. We at Tuff 
Country are proud to offer a high quality product at the 
industries most competitive pricing. Thank you for your 
confidence in us, and our product. 
 
Before installation begins, it is the customers/installers 
responsibility to make sure that all parts are on hand. If 
any parts are missing, please feel free to call one of our 
customer service representative @ (800) 288-2190. 
 
Make sure to use locktite on all new and stock hardware 
associated with this installation. 
 
 
 
Torque Settings
5/16”
15—18 ft lbs.
3/8”
28—32
ft
lbs.
7/16”
30—35 ft lbs.
1/2”
65—85 ft lbs.
9/16” 85—120
ft
lbs.
5/8”
95—130
ft
lbs.
3/4”
100—140
ft
lbs.
Tuff Country EZ-Ride Suspension highly 
recommends that a qualified and or certified 
mechanic performs this installation. 
 
If you desire to return your vehicle to stock, it is the 
customers responsibility to save all stock hardware. 
 
IMPORTANT CUSTOMER INFORMATION
This vehicles reaction and handling characteristics 
may differ from standard cars and/or trucks. 
Modifications to improve and/or enhance off road 
performance may raise the intended center of 
gravity. Extreme caution must be utilized when 
encountering driving conditions which may cause 
vehicle imbalance or loss of control. DRIVE SAFELY! 
Avoid abrupt maneuvers, such as sudden sharp 
turns which could cause a roll over, resulting in 
serious injury or death. 
 
It is the customers responsibility to make sure that a 
re-torque is performed on all hardware associated 
with this suspension system after the first 500 miles 
of installation. It is also the customers responsibility 
to do a complete re-torque after every 3000 miles or 
after every off road use. 
 
After the original installation, Tuff Country EZ-Ride 
Suspension also recommends having the alignment 
check every 6 months to ensure proper tracking, 
proper wear on tires and front end components. Tuff 
Country EZ-Ride Suspension take no responsibility 
for abuse, improper installation or improper 
suspension maintenance. 
 
It is the responsibility of the customer or the 
mechanic to wear safety glasses at all times when 
performing this installation. It is the customers/
installers responsibility to read and understand all 
steps before installation begins. OEM manual should 
be used as a reference guide. 
 
The Tuff Country EZ-Ride Suspension product safety 
label that is included in your kit box must be 
installed inside the cab in plain view of all 
occupants. 
 
If a body lift is used in conjunction with any Tuff 
Country EZ-Ride Suspension product, your Tuff 
Country EZ-Ride Suspension WARRANTY WILL BE 
VOID.