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Before returning this product
to the store of purchase
Contact Dee Zee if you experience the following problems:
•MissingParts
•InstallationProblems/Questions
•WarrantyQuestions
1.800.779.2102
Hoursofoperation:8am-5pmCST,Mon-Friday
Reviewcompletewarrantypolicyandregisteryourproductat:
www.deezee.com
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Dee Zee Running Board Installation Instructions
Congratulations on your purchase of a quality Dee Zee product. Dee Zee is
recognized as having the highest quality running boards and accessories on
the market today. We have earned this reputation by offering our customers
a product they can be proud to place on their vehicles. Dee Zee meets all
the criteria of manufacturing a custom-fit product which guarantees it to
be the easiest product to install.
Note: Please take time to read all of the instructions before beginning this installation.
War ning! Please check for wiring or other obstr uctions before drilling any holes into
the vehicle. If it is necessar y to drill any holes into the vehicle, Dee Zee recommends
putting a sealant or rust inhibitor around all holes drilled into the body of the vehicle.
War ning! It is the sole responsibility of the vehicle owner to check for tire clearance.
War ning! It is unlawful and dangerous to ride on r unning boards or side box boards
while the vehicle is in motion.
Cleaning Instructions: To maintain the bright finish of your Dee Zee running boards,
clean with a mild deter gent. For our stainless steel products and accessories, the
application of a high grade automotive type wax is recommended.
If you should happen to have any questions with this product or you have an
installation question, please feel fr ee to call us at:
1-800-779-8222
If you would like to find out mor e infor mation on Dee Zee’s products please
feel free to visit our website at:
WWW.DEEZEE.COM
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BD 3375 LP/RP
1LH/1RH
GSK-41
4 FT
MUDFLAP
1 LH / 1 RH
B 1848P
X2
BRACKET
BRACKET
BRACKET
BRACKET
Dee Zee Brite Tread Running Board Installation Instruction
DZ 3378 (2010 - Current) Dodge 8' Dually
A B C D
B 1939LP
X1
B 1939RP
X1
B 1938LP
X1
B 1938RP
X1
PN 248
X2
PN 72
X 44
PN 70
X4
PN 71
X28
PN 87
X8
PN 407
X2
PN 114B
X 4
PN 113B
X4
PN 90B
X2
PN 650
X4
PN 78
X12
B 865
X4
SIDE BOX BOARD BULB SEAL GASKET MUD FLAP FRONT
TOP BRACKET
E F G H
LEFT FRONT RIGHT FRONT LEFT REAR RIGHT REAR
I
1/4" U-NUT 1/4 X 3/4" HEX
J
1/4" FLAT WASHER
K
HEAD BOLT
L
1/4" HEX NUT
M N
Q S
DZ 3378 1 OF 10 12/15/2011
1/4 X 1" RIBNECK
CARRIAGE BOLT
3/8" HEX NUT
R
3/8" THREADED
PLATE
M12 BOLT
O
3/8 X 1 1/4" HEX
HEAD BOLT
1/4 X 1 1/4" HEX
HEAD BOLT
P
3/8" FLAT WASHER
9" ANGLE BRACE
T
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WRENCH/RATCHET
7/16", 9/16"
TAPE
8mm
MEASURE
TIN SNIPS
1/4" DRILL BIT
M8 ALLEN
Locate the front sub-box support as shown below. Loosely attach the front driver brace [E]
the bottom of the sub-box support using the M12 bolt [R] and a 6mm allen wrench
TOOLS REQUIRED
1
DZ 3378 2 OF 10 12/15/2011
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Insert the support brace [D] into the opening at the front box support and attach to the brace
using the 3/8" bolt [O], two 3/8" washers [P], and a 3/8" nut [Q].
Attach the lower hole in the brace through the sheet metal using a 3/8" bolt [O],
3/8" washer [P], and the threaded plate [N].
Back side of mounting location.
Tighten the upper bolts using a M8 allen wrench and 9/16" socket and wrench.
Tighten the lower bolts using a 9/16" socket and wrench.
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Locate the rear sub-box support as shown below. Loosely attach the rear driver brace [G]
the bottom of the sub-box support using the M12 bolt [R] and a 6mm allen wrench
2
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Place a 1/4" washer [J] and 1/4" nut [L] on one end of the u-nut [I]. Insert the u-nut in to the brace
hole as shown below.
Bring the end of the u-nut through the other hole in the brace and attach with a 1/4" washer [J]
and a 1/4" nut [L].
Tighten the bolts using a M8 allen wrench and 7/16" socket and wrench.
DZ 3378 5 OF 10 12/15/2011
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Attach the angle brace[T] to the main braces using the 1/4" x 1 1/4" bolt [S], 1/4" washer [J] and
1/4" nut [L].
When installed the angle braces should be pointing towards the rear of the vehicle.
Do not completely tighten at this time.
3
DZ 3378 6 OF 10 12/15/2011
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Using tin snips, cut the gasket provided into 2 equal pieces (approximately 24").
Place bulb-seal gasket [B] onto the back lip of the running board. The gasket will not
run the entire length of the board back lip.
Attach the mudflap [C] to the running board using two 1/4" bolts [K], four 1/4" washers [J], and two
1/4" nuts [L]. Line the outside and bottom of the flap up with the running board and tighten
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in place using a 7/16" wrench and socket.
5
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Using a 8mm wrench/socket, remove the two factory bolts shown below from the wheel well.
Do NOT discard the bolts, as they will be used to attach the mud flap.
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Set the running board on the braces and attach the flap to the wheel well using the previously
removed bolts.
7
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Align the running board with the cab board.
8
Once the side box board is align with the cab board, clamp the running board to the brackets.
Using the slots in the brace as a guide, drill a 1/4" hole at each mounting location.
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Attach the running board to the angle brace using the 1/4" x 1" ribneck carriage bolt [M],
1/4" flat washer [J], and 1/4" hex nut [L]. Tighten using a 7/16" wrench or deep well socket.
Tighten the hardware attaching the flap to the running board with a 7/16" socket and wrench.
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Tighten the hardware attaching the mud flap to the wheel well using a M8 socket/wrench.
Repeat process for passenger side.
DZ 3378 10 OF 10 12/15/2011
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