What size gas tank does a 99 dodge ram 1500 with 5.9 engien have?
The 1999 Dodge Ram 1500 with a 5.9L engine typically had a 26-gallon fuel tank. However, there's a small chance it could be different depending on the specific trim level and options. To be absolutely certain, check the owner's manual or the sticker inside the driver's side doorjamb.