Chassis ID

Northern Faction

0 NF_Jeep
1 NF_APC
//NF_APC_PLASMA
2 NF_Light_Tank
3 NF_Light_Tank_MKII
4 NF_Med_Tank
5 NF_Heavy_Tank
6 NF_Arty_Tank

Brenodi Empire

7 Imperial_Jeep
8 Imperial_APC
//Imperial_APC_PLASMA
9 Imperial_AFV
10 Imperial_AFV_MKII
11 Imperial_Med_Tank
12 Imperial_Heavy_Tank
13 Imperial_Arty_Tank

Commander vehicles

Not sure what will happen if you try to spawn one of these

14 Imperial_Commander
15 NF_Commander