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Adding drain holes to the bed/tray; how?

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3:07 PM
Joined
May 28, 2025
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Location
PDX
... The how is using my favorite drill and bit set. :)

To the point, I need to add some drain holes to the bed/tray of my QM. My truck lives outside, and as I live in the North American Pacific Northwest, it rains. A lot. We average over 40 inches of rain annually. After a recent rainstorm moved through, I had a bathtub forming in the bed of the truck. Several inches of water had pooled up in the bed of the truck, near the back wall, under the window. This was exacerbated by the truck parked on an incline in my driveway.

I placed a call to INEOS Grenadier Customer Service, and while they were eager to answer the phone, they flatly stated that they cannot recommend any modifications to the vehicle. They balked when I requested a line to one of their engineers to discuss such a thing. Which, I understand, even if it's frustrating. They did offer to sell me a tonneau cover, which, while a nice gesture, won't work as the INEOS-branded unit won't fly with my primary use of my truck - hauling motorcycles.

I have a call into my local dealer - RTGT INEOS - and I'm awaiting to hear back.

All of my prior trucks, a few F-150s, GMC, Silverado, a Colorado, and a Tacoma, all had some manner of drain holes in the floor near the back of the bed, under the rear window.

Other than going all cowboy with my favorite drill, how might I go about adding some needed drain holes in the floor of the bed, near the back window? Has anyone attempted such a thing? Areas to avoid?
 
If you pull those holes, you can then maybe route a tube out of the tub. Or you can buy my canvas cover. And have no water problem. I'm moving to a tray and half box
 

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