SUCKS...

and now for the story

the 00+ Bonnevilles dont have performance shift as we all know, So i added a button and a Pin in C21 of the PCM. Now this allows for the Perf shift to function. You need to turn it on via a Tiner so that it can be active. The HPT does not have the option, but the DHP Does. I was at a GP meet over the weekend and got the DHP 1.0 file that was for a Bonneville. I installed the file via the HPT, and tested Perf Shift. It works great...

BUT my car had 6* of KR on a 3.5" Pulley. WTF. now mind you i had maybe a 1* of so with the Intense Burn and a few adjustments. Because it was Midnight when i loaded the file i didnt bother with it at the time. Yesterday and Today i looked at the 1.0 BIN and compared it to my Previous tunes. NOT EVEN CLOSE. the Pulses Per mile are off, Trans settings are off, fueling is off....

if your buying a PCM....dont get a DHP burn, you car will hate you

Isn't DHP what ZZP used/uses?
I know my ZZP PCM is one, if not, the worst tuned PCM out there.
I am now officially getting around 11-12 mpg with the cruise set at 55-58 mph. Only thing I've found so far over the past 5 days (300-350 miles) is that it takes every drop of $20 worth of 91 octane to go 62 miles and my 3 week old AC Delco o2 sensor is saying P0171. I did a good looking over today and found nothing but plugs indicating rich conditions.

yes Marty, its what ZZP uses...

and im finding more things that are wrong the more i look

i would have been PISSED if i actually paid for the 1.0 bin

Pat, how do you wire up the switch for performance shift? add a wire into pin C21 and ground the other end on the switch or what?

i had to use the DHP to turn the Perf shift on in my PCM, and then i added the Pin to the PCM, and then used a switch that grouneded the input