Tuff Country 16731 - GM 88-91 1/2 ton Blazer / Sub 6 box kit (systems with rear springs) User Manual
Page 2
 
LIMITED LIFETIME WARRENTY
Notice to all Tuff Country EZ-Ride Suspension 
customers: It is your responsibility to keep your 
original sales receipt! If failure should occur on any 
Tuff Country EZ-Ride Suspension component, your 
original sales receipt must accompany the warranted 
unit to receive warranty. Warranty will be void if the 
customer can not provide the original sales receipt. 
Do not install a body lift in conjunction with a 
suspension system. 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. Tuff 
Country Inc. (“Tuff Country” ) suspension products 
are warranted to be free from defects in material and 
workmanship for life if purchased, installed and 
maintained on a non-commercial vehicle; otherwise, 
for a period of twelve (12) months, from the date of 
purchase and installation on a commercial vehicle, 
or twelve thousand (12,000) miles (which ever occurs 
first). Tuff Country does not warrant or make any 
representations concerning Tuff Country Products 
when not installed and used strictly in accordance 
with the manufacturer’s instructions for such 
installation and operation and accordance with good 
installation and maintenance practices of the 
automotive industry. This warranty does not apply to 
the cosmetic finish of Tuff Country products nor to 
Tuff Country products which have been altered, 
improperly installed, maintained, used or repaired, or 
damaged by accident, negligence, misuse or racing. 
(“Racing is used in its broadest sense, and, for 
example, without regards to formalities in relation to 
prizes, competition, etc.) This warranty is void if the 
product is removed from the original vehicle and re-
installed on that or any other vehicle. This warranty 
is exclusive and is in lieu of any implied warranty of 
merchantability, fitness for a particular purpose or 
other warranty of quality, whether express or 
implied, except the warranty of title. All implied 
warranties are limited to the duration of this 
warranty. The remedies set forth in this warranty are 
exclusive. This warranty excludes all labor charges 
or other incidental of consequential damages. Any 
part or product returned for warranty claim must be 
returned through the dealer of the distributor from 
whom it was purchased. Tuff Country reserves the 
right to examine all parts returned to it for warranty 
claim to determine whether or not any such part has 
failed because of defect in material or workmanship. 
The obligation of Tuff Country under this warranty 
shall be limited to repairing, replacing or crediting, at 
its option, any part or product found to be so 
defective. Regardless of whether any part is 
repaired, replaced or credited under this warranty, 
shipping and/or transportation charges on the return 
of such product must be prepaid by the customer 
under this warranty. 
 
Special Note: This box kit includes the front and rear 
U-bolts, front and rear brake line extensions, front 
and rear spring eye bolts, transfer case drop 
brackets, sway bar drop bracket and all necessary 
hardware. Tuff Country EZ-Ride Suspension offers 
two styles of front springs, a Heavy Duty spring and 
a EZ-Ride spring. If you have not already ordered 
your front springs, please contact Tuff Country or 
your local Tuff Country dealer and order (2) 18670 
(Front EZ-Ride Springs) or (2) 18671 (Front Heavy 
Duty Springs). Also Chevy/GMC offers (2) different 
length rear springs, a 52” rear leaf spring and a 56” 
rear leaf spring. If you have not already ordered your 
rear springs, please contact Tuff Country or your 
local Tuff Country dealer and order (2) 19870 (Rear 
52” EZ-Ride Spring) or (2) 19671 (Rear 56” EZ-Ride 
Spring). Also, Tuff Country EZ-Ride Suspension 
recommends running a 35” x 12.50” tire for 
maximum tire clearance. Special Note: This tire size 
in not 100% accurate due to variations in wheel 
width, wheel off set, tire diameters and driving 
habits. Tuff Country EZ-Ride Suspension highly 
recommends installing a raised steering arm once a 
6” suspension system has been installed. If you 
have not already ordered your raised steering arm, 
please contact Tuff Country or your local Tuff 
Country dealer and order part # 70100. 
 
It is the responsibility of the installers to make sure 
that the rear view mirror hanger is hung from the 
rear view mirror. The rear view mirror hanger has 
instructions on proper post installation procedures. 
Please Follow Instruction Carefully
Before installation begins, drive and check to make 
sure there are no uncommon sounds and or frame 
damage. Also at this time measure from the center of 
the hub to the bottom of the fender well and record 
measurements below. 
 
Pre Installation Measurements: 
 
Driver Side Front:______________________________ 
Passenger Side Front:__________________________ 
Driver Side Rear:______________________________ 
Passenger Side Rear:__________________________ 
 
At the end of the installation take the same 
measurements and compare to the pre-installation 
measurements. 
 
Post Installation Measurements: 
 
Driver Side Front:______________________________ 
Passenger Side Front:__________________________ 
Driver Side Rear:______________________________ 
Passenger Side Rear:__________________________ 
 
Please follow instructions carefully: