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Changing to a COS doesn’t keep things up to date. It changes it to a different type.

Using a Lingenfelter TRG-200?

While changing the cyl vol on Gen 3s changes the numbers in the VE table it doesn't change the actual airflow. Credit goes to NicD on LS1tech for laying it out the best I've ever seen. See Post #11...

If you compare before and after the VE table will be different.

06 Only and it would include Sierras. And if you are doing V8s it would only be for the V8s. V6s would be completely separate. And unless something has changed when you do the next one you have to...

Was probably burst knock if you didn't have that disabled.

Yea, so was I.

And I have had many set P0121 codes at .7V and higher but if you want to say I'm wrong about .05V, go right ahead Geez. I have never had a problem stopping at .65V

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.