As Summer ends it seems to bring conflict in New Eden and, this year, it looks like war will engulf the entire universe. In the North, Pandemic Legion, Northern Coalition., and Guardians of the Galaxey are fighting the Imperium and TEST Alliance. It is significant to note that TEST allies and Legacy coalition partners Circle of Two are engaged in a fight with SOLAR Fleet and DRF Alliances over renter space that could end up playing a wider role in the current wars. With these conflicts, and multiple others, heating up it looks like no place is safe.
There are several GM liter diesel engine production options. The Turbocharged L56, (VIN "S") was used in most light duty 3/4 ton (2500). Heavy duty 3/4 ton and 1 ton trucks used the Turbocharged L65 (VIN "F") engine. The L56 is emissions controlled with EGR and catalytic converters. The L65 engine has no EGR, and has no catalytic converter . There is a soot trap on L65 engines that is often mistaken for a catalytic converter. GM was the first manufacturer to introduce an electronically controlled fuel injection system into a diesel pickup truck.  The L49 (VIN "P") and L57 are both naturally aspirated engines. L57 is listed as HO or Heavy Duty. Additional RPO codes are LQM (175HP) and LQN (190HP).