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: ATTN 2003+ GMC owners with 285+ dmaxfan 10-15-2004, 09:16 AM I was wanting to know how anyone trimed their plastic spoiler on their bumper to account for larger tires? Mine likes about a 1/4" from touching. Any pic's will be appreciated. P.S. Is the plastic the same color all the way through, or is it just painted? vjb0456 10-15-2004, 10:24 AM I just had bf goodrich m/t 265 installed and the fit is perfect.might have to trim with 285 Jeli 10-15-2004, 10:55 AM The airdam is painted not solid. I turned my wheels to the point of maximum interference then took masking tape and marked where I wanted to cut. With 315's I started 1/3 the way up from the bottom and went down taking about 1 1/4" off the bottom. You won't need as much with 285's. Use a very sharp knife and cut up. Otherwise you'll have a problem starting your cut. Check my pics. Pic "dmax4" shows it the best. I was concerned before cutting it would flop too much or flake the paint but it held up well. Edited by: Jeli dmaxfan 10-15-2004, 12:11 PM Thanks 03GMC2500HD 10-15-2004, 03:55 PM I trimmed mine on its first day home. I used blue painters tape and started 4" up from the bottom and forward 1". I drew a nice arc with a pencil on the tape so it looked factory and started trimming. I used a Dremel tool with a cut-off wheel to knock off the tip. Here is the after. http://www.dieselplace.com/forum/uploads/03GMC2500HD/2004-10-15_125450_03GMC_6.JPG HD-Nate 10-15-2004, 04:43 PM Dmaxfan, I have 285/75 's on mine and did not have to trim anything. I probably put 600-700 miles on them before they even touched the inner fender skirt on a hard to lock, downhill turn. I turned the torsion bars up 3 full turns, more to level the truck out then for clearance and they have yet to touch again with 40,000 + miles on them. tbyrne 10-15-2004, 06:40 PM Hum...I don't think about this. I had to do some trimming to fit 37" tires on my Silverado HD but the plastic on the bottom of the bumper is different. 2005 Sierra HD (CC,LB, DA) - on order 2005 C6 Millennium Yellow Corvette convertible - on order 2005 300C (http://www.tbyrne.com/300/side.jpg) - Mods going on now! 2002 Silverado HD (http://www.tbyrnemotorsports.com/Silverado/02silverado.html) - 8" lift + much more - buy me! 2002 Supercharged 8.1 Suburban (http://www.tbyrnemotorsports.com/Suburban/02suburban.html) - 13.93@ 95.79 - buy me! 2001 Grand Prix GTP (http://www.tbyrne.com/GrandPrix/GP2004side.jpg) - buy me! | ||