Yes, you are right, but you can use the demo for the DZ as a reference, the DZ RN, PT and PL family has the same SCI module SCI_V4, please check it on table Table 2-1. Target Platform of the LIN_User_Manual you can find the document normally on this folder
C:\nxp\FSL_LIN_2.x_STACK_Package_4.5.9\Documentation
And a good sample is on
C:\nxp\FSL_LIN_2.x_STACK_Package_4.5.9\Examples\General_Demo_Application
I hope this will help you