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Yes, It turned out to be a fuel cell and sending unit issue. Replaced full cell and sending unit. All is well that ends well.

Not to my knowledge. All gauges work. No light issues. 1999 C3500 6.5L turbo 5spd 2wd 1ton.

That's probably the only thing I have not done. Silly question, where's it located at. Because I'm not sure where to look at. 1999 C3500 6.5L turbo 5spd 2wd 1ton.

OK so here's what I've done. PMD relocated to drivers side fender well. Replaced baro censor. Replaced turbo boost sensor. Replaced vacuum censor. Replaced crank censor. Replaced lift pump Checked grounds. Included photo of bosch code read out. see attached photo please. I have fuel at...

It's working OK. Sent from my SM-N910V using Tapatalk

If I have faulty OPS how would I check that??? Sent from my SM-N910V using Tapatalk

OK I'll see if I can rent one or something. Sent from my SM-N910V using Tapatalk

Thanks Sent from my SM-N910V using Tapatalk

Battery grounds ,engine ground,going to check ECM ground tomorrow. Sent from my SM-N910V using Tapatalk

Kind of figured that one out the hard way. Everything I research keeps me thinking ECM. I keep hoping I'm wrong. But guess that's why I ask for help. First 6.5l td. Don't know enough about the automotive computer systems. Real learning curve there. Sent from my SM-N910V using Tapatalk

Turbo boost sensor ,vacuum sensor, crank position sensor, baro sensor. Yes ACDelco. Sent from my SM-N910V using Tapatalk

The symptoms are leading right back to it... Or so it seems. ... Sent from my SM-N910V using Tapatalk

New Sent from my SM-N910V using Tapatalk

Well there we go. Guess two heads are better than one,lol Sent from my SM-N910V using Tapatalk

Well I guess I'll be playing in the cold chasing ground issues. Haven't had any electrical issues any where. Wait a minute almost forgot. Had it towed. Had to remove winch from front receiver didn't tighten cables back all the way tight. Could that have caused ecm issue's? Sent from my...

Thanks I'll try that. Not looking forward to another 500 or better repair cost. Sent from my SM-N910V using Tapatalk

Yes did pmd relocation. As stated I changed all major sensors. Changed both lift pumps. Cleared codes. Read test drove . Got P0251 Pump cam reference pulse error. P0606 PCM internal communication interupt. Sent from my SM-N910V using Tapatalk

OK so this my first experience with the 6.5l Chevrolet engine. 1999 C3500 2wd 5spd 1ton. Initially got these codes P0216 Injection stepper motor fault. P0236 Waste gate solenoid fault. P0238 turbo boost sensor to high. P0251 Pump cam reference pulse error. P0370 High resolution circuit fault...

OK so this my first experience with the 6.5l Chevrolet engine. 1999 C3500 2wd 5spd 1ton. Initially got these codes P0216 Injection stepper motor fault. P0236 Waste gate solenoid fault. P0238 turbo boost sensor to high. P0251 Pump cam reference pulse error. P0370 High resolution circuit fault...