Manual

PART NUMBER : 12740
1988 — 1991 CHEVY SUBURBAN 3/4 TON
2” SUSPENSION SYSTEM / WITH REAR BLOCKS
PARTS LIST:
Part # Description Qty.
BL301 3” Rear Lifted Blocks 2
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 3
5U-6112R 5/8” X 3 1/2” X 12 1/2” Round U-bolts 4
58NW 5/8” High Nuts & Washers 2
GMSBNB2 Front Spring Eye Bolts 1
GMBLNB Front & Rear Brake Line
Extensions & Hardware 1
MO2360 Front Spring Eye Bushings 4
S10006 Front Spring Eye Sleeves 2
LUBE Lube Pack 2
12740INST Instruction Sheet 1
INSTALLATION MANUAL
2” SUSPENSION SYSTEM
CHEVY/GMC SUBURBAN 3/4 TON
1988 —– 1991
PART # 12740
SJ0050802
Special Note: This box kit includes the rear lifted
blocks, front and rear U-bolts, front and rear brake
line extensions and 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) 18270 (EZ-Ride
Springs) or (2) 18271 (Heavy Duty Springs)
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 @ [phone].
Make sure to use locktite on all new and stock hardware
associated with this installation.
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.
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.
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 procedure.