is it actually worth a crap, or do they suck just like they did for the ls1's?

Only thing I used mine for on the TA was raising the limiter and shift points. Other than that it was worthless.. then edit came out

jsut wondering if they actaully help the trucks in anyway?

 

Same as it was for the LS1...

You can actually gain in the 1/mile with it in the trucks because of the shift points but it's only real HP gain is part throttle acceleration.

 

I gained almost .5 with mine...no BS. I do like it especially for the shift points and firmness etc, and the fact that I can keep my speedo correct when switching from my 20's to my 17's. I wouldn't buy it again if I had it to do all over again. I'd go with HPtuners. However, you can usually pick up a used HPPIII for less than $200, which I could see buying since you can usually get your money back if you decide to upgrade or get rid of the truck. I've seen a TON of them in the $125-$150 price range for the older '00, '01, and '02 trucks. Unfortunately for you the '04's are still pricey.

 

like **** said...
i think its worth it b/c you can buy them for so cheap now second hand. i bought mine when they first came out and thought it was the ****... i like it b/c i got all my shift pts. set at 6200. all i have to do is leave it in drive and let the trans. do the shifting on its own. it was also good when i changed my gears too...

 

I have one that i gained about .4 with, but im selling it to get a nelson tune.

 

Like I stated though, remmeber that your gain is from shift points being optimized for the 1/4mile. So passing power isn't really efftected much.

 

they aren't bad for someone doing very minor upgrades. ordering a pcm from pcmforless or nelson can occasionally run into an issue with the crankshaft relearn issue and some people haven't got a clue what that's all about. for them kind of people the hypertech is great. it's main gain with a 5.3 is going to be shift points and tire size options. if you have any kind of experience with programming you're much better off doing your own. tunercat and hptuners are either the way to go for pricing in the range of the hpp3. the option of a direct pcm swap from a tuner such as pcmforless.com or nelsonperformance.com (there are about 5 others, but these are the most common) are probably the best way for someone with a little bit of knowledge on the subject, but not quite enough to tune their own. some have even bought the tuning software and had the tuner just e-mail them the tune. this is handy because you still use your pcm and don't have to worry about the crankshaft variation learn issue. you also can simply e-mail the tuner your logs if you aren't happy with the tune and by the next day have another tune to flash in. without knowing what to change in the tune yourself you still ended up with a much better tune than the average guy and have the software to help with diagnosis and many other things.


lots of choices.

 

what are the stock shift points and limiter on the 04's? Any idea what i should set mine to for best power

 

I installed the 93 oct tune, 6200 limiter, 1-2 shift +3, 2-3 shift +9, 3-4 shift +0, firmer shift. I'm not sure what the stock shift points are, but I think the rev. limiter is around 5800.

 

damn.. 203 shift must be wayyyy low.. i havent looked at the tach on the 2-3 since i was looking at larry the 2 trucks I raced in the rearview