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©2021 Keystone Automotive Operations, Inc. All Rights Reserved. 08/26/2021-Rev1 Page-1 of 20
Use with 10 bolt 30686 base rails. Base Rails are not included with this kit.
Center Bolt Kit 33156 (sold separately) must be used when towing with a 26K hitch,
Gooseneck, or Maneuvering System.
PART NUMBER:
33220
Install Time:
90-120 MINUTES
Assembly, Installation, Operation
and Maintenance Instructions
GMC Sierra/ Chevrolet Silverado
2500/3500 Base Rail Bracket Kit – 2 Piece
APPLICATION: For use on GMC Sierra 2500/3500 & Chevrolet Silverado 2500/3500
Dealer / Installer:
Provide a copy of these instructions to the end user of this product. These
instructions provide important operating and safety information for proper usage of
this product. Demonstrate the proper use of the product with the end user. Have the
end user demonstrate that they understand the proper use of the product.
End User:
Read and follow all instructions included in this manual. Ask your Dealer / Installer
for assistance if you do not understand the proper use of the product. Never remove
any decals from the product. Failure to follow these instructions can result in injury
or death.
WARNING
DO NOT EXCEED Recommended towing limits. SEE VEHICLE’S OWNER’S MANUAL.
WARNING
WARNING
Complete Parts List
ITEM NO.
Description
QTY
ITEM NO.
Description
QTY
1
DRIVER SIDE BRACKET
1
10
5/8" FLAT WASHER (BLACK)
4
2
PASSENGER SIDE BRACKET
1
11
5/8" LOCKWASHER (BLACK)
4
3
CLIP-ON NUT
4
12
U-BOLT SPACER
2
4
SPACER PLATE FOR 5/8" CARRIAGE BOLT
2
13
U-BOLT
2
5
5/8" FLAT WASHER
2
14
1/2" -13 NYLOCK NUT
4
6
5/8" LOCKWASHER
2
15
1/2" FLATWASHER
4
7
5/8" -11 UNC X 2.00 CARRIAGE HEAD BOLT
2
16
SPACER PLATE
4
8
5/8" -11 HEX NUT
2
17
PULL WIRE
1
9
5/8" -11 X 3.5" HEX HEAD BOLT
4
18
SPACER TUBE
4
TOOLS REQUIRED
3/4" WRENCH & SOCKET
15/16" WRENCH & SOCKET
5/8" DRILL BIT
5/8" TRANSFER PUNCH
SAFETY GLASSES
