My Suburban (97 2500 2WD LT trim) was purchased new as a test/dev mule by (now defunct) Dynamic Turbo down in Florida. Its got all the normal 6.5 mods (Banks down pipe, Diamond Eye 4" Exhaust, relocated PMD). The ECU I'm replacing has labels saying "Property of Dynamic Turbo" and it did have a good tune.

I don't tow heavy or race but I did enjoy the 20-21 mpg on long trips. Hoping this stock ECU will get good mileage. Otherwise, I'll probably send it out for flashing with a good economy tune. I've seen some advertising 25 mpg but I'll remain skeptical until I hear it from someone I know and trust.

Jim