[Steeveedee]

I have saddle tanks on my truck. Post a pic of your cap (both sides) with a steel scale next to it, and try to find a part number on the cap. I'll eventually have to replace my caps, so it will be interesting information for me as well as others. What year is your truck, and does it have Federal or California emission controls? We can steer you through the various emissions requirements, don't worry about that!