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Go talk to some transmission shops/builders about what is the #1 thing that goes out first on GM 6 speed transmissions.

You can go as high as .65V on the closed tps voltage and it will still reset to 0% and not set tps codes. That gives it a little extra air around the closed blade for a cam and not have to drill the...

Keep the converter unlocked until 5th and 6th gear 50 mph and above. With 3.08 gears you need to take advantage of the torque multiplication an unlocked converter provides. Your TC lock up clutch...

Then the calibration is correct and any error is in your cluster.

Throw any non GM AC Delco sensor in the trash.

I don't care what your gauge in the cluster reads. I only care about what the scanner vs gps reads. That will determine if the calibration is correct. Give me clear unambiguous scanner kph data at 80...

Gen 3s don't need a cam sensor signal to run. Without the CMP signal the PCM will attempt to start the engine guessing if a cylinder is TDC compression or exhaust. If it doesn't start then it will...

Cam gear? Its a 05 Silverado 1500 5.3 L33. Don't confuse the OP.

It doesn't matter what the speedometer shows. There can be error in the cluster. What is important is what the scanner shows vs GPS speedometer. Have you checked it that way? I like to check them at...

It is manually scaling the shift and TCC lock up tables up or down by the tire size difference. The wizard doesn't work well on 98-99 black box PCMs entering tire sizes. In this case he is manually...

I use Tunercat to make the changes, then flash it to a PCM, then read it back out with HPT. It is not based off your file, Just another 98 K truck. That is why you need to copy the settings to your...

And don't go my what your cluster shows for MPH. There are free speedometer apps for your phone that use gps. Compare what the scanner shows for MPH vs what the gps shows.

Load this as a compare file. Copy over all the speedometer settings. If you have already scaled the shift and TCC lock up tables, return them all to their stock settings. Then use the manual scale...

Give me a little time and I'll have something for you to try. I don't use HPT to correct gear/tire size on 98-99 black box PCMs. It doesn't work very good.

What was the stock tire size on the truck?

Why open loop?

What is the actual tire size on the tire, not the tire height.

my experience with them is 99.9% of new out of the box AC Delco TCMs are reman units and have some program with 4 segments in them.

Write Entire, not Write Calibration.

There can be multiple different segments in different 06 calibrations. If you want everything to be correct for your particular vehicle you need to flash it with the correct calibration with all the...

Read 06 PCM. Write entire 06 file to 05 PCM. You will have to do the 30 minute VATS relearn. You will also have to license the new PCM with 2 credits. With HPT you always have to have a license for...

OP you could try removing all power. Disconnect battery for 30 minutes, reconnect then see if you can read the ECM.

I agree with write calibrations. They are brickable with write entires.

You probably bricked the ECM somehow. That's why you should always write calibration if write entire is not necessary. Less chance of corrupting the ECM is there is a glitch. Again on the DTCs. I bet...

99 and 00 use the exact same injectors and the data is the same in either year calibration.