OK got in the truck to take it to the mechanic and it stalled and died 1/8 mile and then I had a hard time even getting enough power to get ti 3 miles to the mechanic. Slowed to 5 mph going up slight hills. Still getting P0087 code and I called loves truck stop and they were kind enough to check back in their credit cared records for my fuel purchase and confirmed I bought gas diesel. So now the local mechanic is only going to replace the filter and we will see if that helps.
Next question if it comes down to needing new injectors how hard is it to change them. Not that I'm going to do it but for the Chevy dealer. I see online at Injector Wharehouse they are $200 plus core of $100. I called Chevy parts and they want $350 and $100 core.
Found this... guess this is not a DIY
The LB7 injector job is pretty significant. The injectors are buried below two layers of valve covers, each with a gasket that is both expensive and generally not saveable. Each injector also has a return washer that must be replaced. All of the FICM seals and water seals must also be replaced when performing this job. Gaskets and seals alone can be as much as $400! Add 8 injectors at $359 each (dealer price) and this job is pricey.