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Old 06-12-2016, 10:22 AM   #11
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Location: Calgary, AB
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Originally Posted by grumpyoldman View Post
What dimensions did you use to make the access door? Where did you measure from or did you just eyeball it? Getting ready to do my first filter change and am not looking forward to pulling down the inner fender well.
The dimensions are 8" X 5" but if you look close at the picture you'll see that the left side is curved to the contours of the 2011 - 2014 chevy fender well. The same year GMC's have a different fender well.

I bought the door online at MADJACK so there was no measuring. Just traced and carefully cut the hole about an inch in from the marks.

They have them for every GM truck model year.

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Old 06-12-2016, 12:44 PM   #12
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2015 GMC Denali 3500 4X4 Duramax
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Old 06-12-2016, 03:55 PM   #13
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Last year on vacation I changed the filter 4 times in 600 miles . Finally got tired of taking the inner fender out and back in , so I threw in the bed of the truck . Needless to say I was getting good @ changing them .
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Old 06-12-2016, 03:57 PM   #14
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Originally Posted by RubyDually View Post
Added this fuel filter access door on my 2014 which makes changing the filter almost a breeze.... I usually dab a bit of Vaseline petroleum jelly on the o-ring and that holds it in place.
Nice and neat job . They should do this from the factory .
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Old 06-12-2016, 09:01 PM   #15
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You mentioned trying a different brand, but I used parker racor (delco) on my duramax to 200k miles and not even one hiccup with the fuel system. I highly suggest sticking with parker and saving $10-15 not paying for ac Delco name.

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