Easy To Use Performance Programmer
This programmer could not be any easier to use. I recommend going online and print a copy of the instruction manual (about 5 or 5 pages) because there were no instructions with the programmer. Most people won't need the manual, but nice to have. I went for the highest setting that requires high test gas, firm shift, and 10 mph higher shift points. I did notice a little more power, but the real winner was the transmission, with much better performance. Good buy!
Does what the local Chevy dealer is unable/unwilling to do.
After swapping the rear end to a higher gear ratio, I took my truck to the local Chevy dealer to have the speedometer calibrated. They told me that they did not have the codes needed to reprogram to reprogram my truck and that they could no longer get the code. After plugging this little programmer into my computer and downloading the codes it needed, I had my speedometer calibrated in less than 10 minutes.