Well, several years back we had some customers send in some pictures showing why it didn't work for them on their truck pickup tubes. GM used a large tack weld to hold their mounting tab onto the tube while the car type tubes did not have this tack weld. The location of it was in the way of the girdle and it wouldn't fit flush on the tube. This interfered with the girdle to the point you couldn't use it. Now maybe not all truck year tubes are like this, I don't know... but we didn't want to sell to someone that couldn't use it. That's why we say it wont work. If your pickup tube does not use any tack welds to hold on the factory mounting tab, then our girdle will work fine for you.