Howdy Y'all...

2005 GMC 3500, about 140,000 miles. Stock, owned since 2010 @ 40,000 miles

About 2 years ago I lost all power and puked smoke an hour into a 5 hour drive home. Limped it home and checked codes. Code was Turbo Vane Position Sensor. Replaced it and it ran great until now.

Last month, same symptoms, same code, as well as one instance of a code for the MAF. I had scanned a handful of times and the MAF code only came up once. Replaced the Vane Position Sensor, ran great for a day then crapped the bed again. Has run fine most of the time since last month but the same symptoms have appeared a couple times then gone away. The last 2 times I went to drive the truck, the symptoms were as bad as they've ever been. This morning it stalled 4 times on my block so I parked it and scanned for codes. No codes whatsoever. I ordered another Vane Position Sensor and just finished replacing it. Didn't work.

Still no codes. Any ideas? Thanks, all!

Brett