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With the release of version 3.4 is there more transmission features available for tuning?

It's a 96GMC K1500 with a LQ9 408 and GTO accessories.

Does anyone have a data sheet for the P1638 DTC?

I was driving home Friday night, luckily 100 yards from my house and my truck just shut down. I still had accessories but the engine was off and could not restart.

I managed to coast into the...

When is there going to be a digitally signed driver for HPTuner?

Has anyone tried the new drivers from FTDI?

http://www.ftdichip.com/Drivers/D2XX.htm

I'm curious if they are digitally signed like they say or if we still have to bypass pre-startup to load...

We changed a bunch of the tables in the trans parameters but the tranny is still not shifting right. Here's 3 log files and a screenshot. We are logging a few DTC codes, not sure if any of them...

Can anyone list all the parameters I should log to properly diagnose and tune my transmission>?

Lance, there is a 1998 Chevrolet Silverado in the Tune Repository with an automatic. This might give show us the differences, hopefully GM didn't change anything from 96 to 98. I put 1998, Chevrolet,...

The tranny shop that did the build was closed when I called. I think they are open tomorrow, i'll try them then or Monday. RC

Engine is an LQ9 408CI, 8.4:1 compression ratio, Eagle forged rotating asembly, JE forged pistons, I think the heads are L92 and an L76 intake, Custom Comp Cam, drive by wire 90mm throttle body,...

I'm running 265-75R16's and 3:73 rear and front end. The trans is beefed up but stock ger ratios and im running a TCI 3K stall.

Unfortunately I don't have a stock file. The truck was a 5.7L...

The shifting in my truck is acting up and I don't have a clue where to begin changing things to fix it. The engine starts and runs really good, I had it tuned professionally. For some reason it will...

Thanks for the reply, I think we still have the 96 GMC K1500 sensors in the engine but I will do some checking. I'm going to run a couple new grounds and see what that does also.

I'd put my money on no fuel injector pulse. Either a bad fuse or a bad ground are a definite possibility. How did you verify fuel pressure and spark? Did you look at the regulator or a gauge on the...

Anyone?

The big kicker that is not the programming is that the fuel gage doesn't work either and that is direct in the GMC I believe. The only thing that is working is the spedo.

Is anyone running a similar setup? 1996 GMC K1500 w/2002 Corvette programming. I have been told that it is compatible with my dash but for some reason it is not working.. Frustrating..

Is this a PCM communication problem with my dash instruments? I am wondering because we had my truck running with drive by cable and a truck tune and it ran fine. The problems started when we changed...

I am having something weird going on with the instruments on the dash. We had the truck all wired and hooked up for drive by cable. The dash worked great. We ran into programming limitations and...

We're running a 1999 PCM and FAST throttle body. If you would like the part number PM me and I can get it for you later tonight. Thanks, Rick

Tim, sorry for the confusion. Myself and Speedfixx are working on the same vehicle.

Transmission data is included in the PCM data, no codes other than emissions.

Here's the .HPT file we are starting with. We have VATS disabled but it is still acting like the security is enabled.. Any help would be greatly appreciated.

Ok, give me a little bit to download them, in the mean time here's a video. you can see what's going on.

http://youtube.com/watch?v=OW1uR7BFPzQ