CELEBRATING 20 YEARS!

Today I started the car and when trying to put it in reverse, the car stalled but fired back up when I restarted. Just like before, no MIL light or fuel pump priming but will do just as you're turning the key to the start position...weird. Shutting down when shifting into Reverse has happened on a few other occasions, that's why I thought it might have something to do with the Ignition switch or there being slop in the steering column.

I'm stumped!

I've experienced a couple more engine cut out issues. Once while driving and once just placing the transmission in reverse. As mentioned before, there is slop in the steering column so I've decided to remove the column and send it in to be rebuilt. It may not solve my issues but it is possible it will...it needs to be done regardless.

Well it didn't resolve my problem but everything dealing with the steering column works great! One difference I have seen is that now it will not shut off when shifting into reverse.
So last week I used my scan tool when the car shut off and would not start back up. There was no communication between the scan tool and the PCM. I then wiggled the wires at the starter and just like that, the fuel pump pressurized, check engine light came on and the scan tool linked with the PCM. The problem is in the PCM power supply wires!
Chipping away a little at a time...

Baby steps, baby steps... Troubleshooting is always fun. Good luck on getting it nailed down and fixed.
I forgot another issue I had, where the screw terminal on the aftermarket fuse block was loose. It killed the fuel pump power and I think another circuit, might have been a feed to the ECM too. Might take a look there as well, depending on how your system is wired and routed. Don't forget wires that might be bumped by the steering shaft, or by the engine torquing differently when in reverse than in drive. Basically, anything that moves when you go to reverse. Even though that isn't causing it to stall, it used to and you still have the same problem with a different cause.

Thanks for helping Shawn. I want to get a GoPro camera to see and hear what goes on in that suspect area when it shuts down.
I decided to do some maintenance while I have the car up on wooden blocks, a little over a foot in the air. I fixed a small tranny oil leak, replaced the parking light housings, topped off the differential oil, cleaned the whole underside with 4 cans of brake cleaner (because of the oil leak), tightened one of the front sway bar end links and am currently in the process of replacing the transmission cooler lines with braided hose and AN fittings to the cooler.
Next on the list is replacing the way too long LS1 Trans Am accelerator cable with one from an '02 Silverado with a 6.0.

Go-Pro's are awesome. You might look into a magnetic base for it. We use them for work, and built a handful of bases with some strong neodymium magnets and a 1/4"-20 screw stud for the mount to screw onto (with a locknut). We put a couple layers of tape on the magnet to make it easier to remove and easier to clean. On flat steel, it was almost impossible to budge. We launched them on barges dropping into the water, some of them getting hit full force with jets of water, others getting jolted 10g's and barely moving at all, but no drilling or gluing required to mount them. Tie a string on it just in case if you want an added layer of protection against losing it.

I was about ready to buy a knock-off GoPro before we bought a handful of them for work that I can use when needed... Anyway, sounds like a plan. Good luck.

https://smile.amazon.com/Mutuactor-Powerful-Neodymium-Threaded-Pull-Force/dp/B07JKWCVTX/ref=sr_1_5?dchild=1&keywords=magnet+stud+1%2F4-20&qid=1611065852&sr=8-5