I installed a programer on it no its throwing codes
SOURCE: can i pull an engine
Unfortunately you can not.
Older GM vehicles with OBDI (pre '95) you could.
I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa
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Very odd. A Google search comes back with lots of "Duramax" hits . The code is: "Fuel System Leak Detected - Large Leak"
Some fixes that I found were replacing the fuel filter, others changed the FPRV (Fuel pump return valve?)
When you're pulling a trailer there is a much greater load (air resistance) even when just cruising. Empty or fully loaded, it's mass won't matter, it's the extra fuel required at every phase of your drive. If the fuel filter is getting clogged, it's possible that some sensor is showing a pressure that is beyond predetermined limits. Try the fuel filter replacement first to see if that fixes it.
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