I put a 1998 5.7 Vortec into my 2000 S-10. I decide to upgrade to the 0411 computer, and thanks to Lextech, the swap went very well. The truck started on the first try Friday night, and it was awesome!

I got all the usual stuff. I had to wire the fuel gauge return when the fuel gauge didn't work, and I have to do the crank relearn, but I may have an unusual problem.

My truck has a digital PRNDL in the instrument cluster that doesn't seem to function anymore. The PRNDL shows up, but the box that surrounds the gear selection doesn't show anymore.

The shop manual for the S-10 says this occurs when the Class2 Serial data from the PCM does not return the value of the gear selection you have currently selected. Using the EFI program, I can see on the dashboard that the computer does indeed know what gear it's in, and the truck drives fine. It shifts through the gears, and the torque converter locks down appropriately. I just don't have an indication of what gear I'm in.

I should also note that the instructions from Lextech said I needed to splice the wires from the Neutral Safety switch to the PCM, but my truck had the circuits already in existence, unlike the wiring diagram, so I just ran those to the PCM and put them in C1 and C2 as instructed. I just assumed that maybe my truck was built in transition to the new style of PN Safety switch, so I was lucky and already had those circuits.

However, the shop manual for the 2002 Express shows that the 4 circuits that determine what gear you are in (P,A,B,C) splice out after the connector, and attach directly to the Instrument Panel Cluster.

Have any of you had similar issues with the PRNDL not working after upgrading your 0411 with the stock 4.3? Or even better, has anyone had problems after swapping to the 5.7?

Sorry for the long post. I appreciate any feedback anyone can give.

Thanks.