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Old 03-08-2019, 03:21 PM   #11 (permalink)
Paragon29
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Holes are circular and right around 3 1/2 inches.

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Old 03-08-2019, 03:53 PM   #12 (permalink)
scocciante
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@ 3.5" I take it the 4 corner plugs fit somewhat tight .I installed the under bed framework no holes yet I needed the exact size before i did that.

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Old 03-09-2019, 06:41 PM   #13 (permalink)
Paragon29
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Holes cut into the bed from the factory are 3 3/8" in diameter.
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Old 03-09-2019, 08:14 PM   #14 (permalink)
scocciante
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Very good Thanks much Will get it done this week. Just ordered a 2020 Grand Design 344GK And need to Finish the truck.
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2007 GMC Topkick C5500 Crew Cab Long Bed Dually LLY/LBZ Duramax
Allison 6 Speed Upgrade PPE Level 2
Velvac Power Mirrors
Glowshift Turbo Boost, EGT & Trans Temp
Kenwood eXcelon DNX994S Compustar Remote Start
Hellwig Front Anti-Sway Bar Bilstiein Shocks
AirLift B&W 25K Companion
Tahoe LED DRL Projector Head Lights
4" Exhaust Cat Died.


Grand Design 344Gk 5TH Wheel
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Old 03-10-2019, 01:48 PM   #15 (permalink)
RINGNEKS
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Quote:
Originally Posted by scocciante View Post
Very good Thanks much Will get it done this week. Just ordered a 2020 Grand Design 344GK And need to Finish the truck.
Congrats, thatís a nice rig.
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Old 03-11-2019, 07:42 PM   #16 (permalink)
scocciante
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What type of hitch do you have. I am planing on a B&W and trying to figure if those puck mounts on the hitch itself are deep enough to keep my duraliner in place and drill the duraliner too. ??
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2007 GMC Topkick C5500 Crew Cab Long Bed Dually LLY/LBZ Duramax
Allison 6 Speed Upgrade PPE Level 2
Velvac Power Mirrors
Glowshift Turbo Boost, EGT & Trans Temp
Kenwood eXcelon DNX994S Compustar Remote Start
Hellwig Front Anti-Sway Bar Bilstiein Shocks
AirLift B&W 25K Companion
Tahoe LED DRL Projector Head Lights
4" Exhaust Cat Died.


Grand Design 344Gk 5TH Wheel
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Old 03-11-2019, 09:55 PM   #17 (permalink)
RINGNEKS
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I didnít get the factory prep system, I installed the b&w turnover and use the Andersen hitch, hang it on the wall after Iím done using it, I love it.
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Old 05-02-2019, 04:52 PM   #18 (permalink)
dist3allaround
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And those stupid plugs and all the holes is why I ordered mine without the factory goose-neck system and have a B&W going in it on Monday!
My dad has the factory system in his and I can't believe they thought that was a good idea.
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Old 05-03-2019, 08:48 AM   #19 (permalink)
Rusty Scupper
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Originally Posted by dist3allaround View Post
And those stupid plugs and all the holes is why I ordered mine without the factory goose-neck system and have a B&W going in it on Monday!
I can't believe they thought that was a good idea.
*2
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