What chip do I have

[t8ter]

Just bought this truck.How do I tell what chip it has.There are no names on the chip.I think it has 4 settings.Only thing the other owner said was that the truck ran better and got better mpg on the highest setting.
Thanks T8

[Patrick]

Quadzilla makes a good 4 position chip. Does it have a rotary knob? How long has the chip been in the truck? In the early days of diesel performance alot of chips were 4 position. Only a handfull of custom tuners use 4 positions now. Van Aaken is either a 3 or 4 position. Wish I had a better answer for you.

[Diesel Freak]

[t8ter]

Okay dsl is down at the house.I will work on pics.It has a roto knob.