no one does it like zzp! it works perfect.
3800 PCM Review
0-40 with my 99 Lesabre with 2.86 axle ratio and original GM updated flash took 5..1 seconds. Avg mileage was about 26 mpg. After I installed ZZ's flash, 0-40 time was 4.5 seconds and mileage was just over 27. Shift firmness and throttle response is much improved. Both tests were with 87 octane gas and mostly highway driving.
Remote tune, awesome service!
Tim from ZZP handled my PCM update. We exchanged multiple scan and tune files to get it right. Next day response with tune updates, flash and send in a scan file. It was that easy!
It worked as it should an better performance in the mid range
Experience was great still in the process of remote tuning