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Les langues disponibles
5/8" BOLT
1/4" BOLT PLATE
FRONT
REAR
1988-2000 CHEVY & GMC (CLASSIC):
1. The 12mm diameter bolts and weld nuts at the end of the frame must be removed. ( Wear Eye Protection) Method 1) Back out the
12mm diameter bolt halfway. Drive the bolt upward by striking the bolt head with a ball peen hammer to break the nut loose. Ream out the
bolt hole to 5/8" diameter. Method 2) Remove the 12mm bolt and discard. Using a 5/8" drill bit, drill out the nut. Then remove the remainder
with a hammer and chisel. Some vehicles have an additional 8mm diameter bolt on the passenger's side. Remove the bolt and reinstall it with
the head on the bottom of the frame.
2. If your vehicle has rivets on the bottom of the frame or the 8mm bolt, you will need to install one 3/8" thick spacer between the frame and the
bracket at each bolting location. These are needed for clearance between the bracket and the rivet head or 8mm bolt. The bracket can not be
bolted directly against the rivets or 8mmbolt.
3. Using the supplied hardware, insert 5/8" diameter bolt with bolt plate down through the hole created from the removal of the 12mm nut. Fasten
the bracket to the frame. See the illustration. For short bed use hole 2. On long bed use hole 1. NOTE: SOME DUAL PIPE EXHAUST
SYSTEMS WILL HIT THE BRACKET. THE EXHAUST WILL NEED TO BE MODIFIED. Attach with 3/8" spacer, 5/8" lock washer, and 5/8'nut.
4. (Short Beds): Insert 5/8" bolts with bolt plates down through the 1" diameter holes in the frame and into holes (4) in the brackets. Install a 3/8"
thick spacer, 5/8" lock washer, and nut on each bolt. Leave the nuts loose at this time.
5. (Long Beds): Insert 5/8" bolts with bolt plates down through the 1" diameter holes in the frame and into holes (3) in the brackets. If the forward
holes are only 1/2" diameter, use the 5/8" drill bit to enlarge them. Install a 3/8" thick spacer, 5/8" lock washer and nut on each bolt. Leave the
nuts loose at this time.
6. Place the center section between the brackets as shown. The spare tire may need to be loosened. Bolt through the center section and the
bracket with 1/2" bolts, lock washers and nuts. NOTE: Be sure to use four holes to bolt the brackets to the center section.
7. Tighten the nuts in the following order:
First torque the 1/2" nuts to 70 ft•lb.
Then torque the 5/8" nuts to 115 ft•lb.
8. Retighten the spare tire if it was loosened.
9. Be sure that the spare tire is not rubbing against the brake hose. If needed, bend the bracket that the hose mounts to a little so that you have
clearance between the tire and the brake hose.
5/8" BOLT
3/8" SPACER
1/2" BOLT
1/4" BOLT PLATE
3/8" SPACER
3/8" SPACER
5/8" LOCK WASHER
5/8" NUT
Hole 1
TOOLS REQUIRED
15/16"
SOCKET
15/16"
WRENCH
3/4"
SOCKET
3/4"
WRENCH
19MM
WRENCH
19MM
SOCKET
15MM
SOCKET
15MM
WRENCH
5/8"
DRILL
TORQUE WRENCH
Hole
3
Hole 2
1/2" NUT
1/2" LOCK WASHER
Hole 4
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