I got the ECU today and installed it, WOW I am very impressed, the car is fast and fun. Thank you for all of your help. I have included a pic of the car that got a new brain.
W.B., Oregon ('98 Cadillac STS)

By the way that new tune you sent me ran a lot better at the track, I cut a 1.9 60 ft. ran a 13.32 @ 102.55!
B.S., Louisiana ('06 TB SS)
The truck runs fantastic, it is like night and day. Thank you for the great support and fantastic end result! We had a blast "playing" with the dyno yesterday. I've enclosed the pictures and 1 video taken with my phone yesterday. The quality isn't the greatest but it gets the idea across.
J.R. & M.R., Texas
Thanks for the call back, I had already left town on Friday night - drove to Blacksburg for a football game, and put about 600 miles on the truck. I really like the tune, the shifting is dead on, and the hesitation from the TM is nothing but a bad memory.
R.S., Maryland
Just wanted to let you know I'm still very happy w/the PCM upgrade. I went on a trip over the 4th of July weekend. I towed my trailer in the worst conditions I could immagine....117* outside while pulling up very steep grades.Truck did great..no pinging, more power and 1 1/2 mpg better. Hopefully I'll be upgrading my Yukon XL's PCM soon.
J.G., California
So far everything is great. The power is very noticeable especially on the mid to upper end. The truck pulls strong all the way throughout each shift. This modification has made the biggest change in my truck bar none, it's great! You guys really know your stuff!
D.W., Wisconsin
Just to let you know, yesterday my customer was bored, so he installs (finally) the PCM you send us, then he called me and told me to go to test drive the truck, i was shocked! full throttle start means that the truck shift to 2nd gear almost in 2 seconds, and that means endless wheelspins, really scary, top speed was about 150 MPH, maybe a little less. Don't know exactly how much more power the truck produces right now, but really makes me think just how dangerous this truck is going to be with the 600 hp small block waiting to be installed into.
P.C., Chile
The truck drives well. Solid shifting, and definitely feels more powerful. Did some towing this past weekend and noticed that it shifted less, which is good. The speedo is spot on as well. I'm pleased with the results...I appreciate your pre and post sales efforts.
J.D., Minnesota
I am impressed with my new PCM. I really like the extra throttle response. Too early to see a difference in MPG. Thanks again for the great customer service!
N.L., Nevada
Installed it yesterday, easy to put in, it is hard to see if all the connectors are lined up when you put the new one in before tightening it up but other than that a breeze, it sure has a punch from 40 mph to 70 mph, it has clean shift points...I picked up my buddy that has a 2500HD duramax and he has a quadzilla chip in his, and he likes mine better and thinks it's a better and cleaner idea to have the whole PCM reprogrammed rather than modified. You may have more buyers coming your way.
E.P., Minnesota
04 5.3 rcsb: airaid intake, gibson shorties, Gibson catback, Radix/
MagnaCharger
before tune... 367/397 after tune ... 398/411
This is a low octane tune from Wester's...our gas is such crap in AZ I asked him to tune it safely. Was pig rich too sitting in the low 11s the entire run. yes, money WELL spent!!!!
These dyno numbers are also with my 22s on, and a stock pulley, which certainly makes a decent difference.
All the way through the dyno graph the power is up at least 10-20 horse and pulls away at the end. Torque is up throughout, no less than 20 from 3000-5000 then it comes down to about 10 over at the end of the run. It most certainly made power throughout. I'm not a peak number guy either. The truck is a completely different animal now.
Driveability is great. I can go all day and never make the charger whine (but why the hell would I do that).
At this point im aiming for 475/475. That will include a very mild cam, Dynatech headers, and a more aggressive tune. Now that I know Wester's REALLY knows their stuff...I'm very excited about exploring it more. Will be looking for a 4L80e at this point to handle all the extra power.
T.H., Arizona
I have had the tune in for a week/10 days and I am pretty happy with it. Definitely a seat of the pants difference when running 93 octane, (makes me wonder about the 93hot tune), and I believe that gas mileage is better running 93. I've put one tank of 89 in it and don't get the same feel or gas mileage.
M.F., Michigan
I have had my 2002 Trailblazer tune in now for about 2 weeks and I love it. It really makes the vehicle fun to drive rather than just so so. I had some pinging problems when I first installed it, but after several tanks of 93 it has gone away. Thanks for all your hard work on the PCM> I am so impressed with it after the first of the year I am going to buy a tune for my 96 Chevy truck.
S.S., South Carolina