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Ed Wright · 04-18-2017, 11:34 AM

Those things were a problem to get past EPA certification. A friend of mine is a GM Calibration Engineer, and worked on that deal. Power and gas mileage left on the table there. All in the computer.

I have not heard any complaints about durability. I had one in a motorhome. Thought it was fine. Had mine up to 8 mpg towing my race car, if I stayed under 70.

04-18-2017, 11:34 AM	#2
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 389 Times in 168 Posts	Re: 2003 8.1 l 2500 Those things were a problem to get past EPA certification. A friend of mine is a GM Calibration Engineer, and worked on that deal. Power and gas mileage left on the table there. All in the computer. I have not heard any complaints about durability. I had one in a motorhome. Thought it was fine. Had mine up to 8 mpg towing my race car, if I stayed under 70. __________________ Ed Wright 4156 SS/JA