Visual problem mod

[fabbromix]

Dear Community,
after making some mini changes in this mod after reloading the whole I have a problem in displaying the side bellies with a finish in my opinion (glossy chrome).
Could you help me understand what happened? (the only flaw in the whole mod).
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Mod Original:

Mod Modified:

[Harald-RS]

Wrong UV Chanel by export

[fabbromix]

Wrong UV Chanel by export

Would you kindly give me the steps to take.

[Harald-RS]

have you change bei the Truckpaint mat the UV 2 to UV 3 and add the empty.dds under the material?