Look for IDs in the 14 million range to start with. DPS really pushes their statewide interoperability ID scheme and most municipally owned Harris systems don't tend to utilize it where DPS radios on those systems typically do. 14M is for SPAG.
Pages 23-25 on this
document have the "official" ID scheme (of which most major P25 systems utilize). Most ID's are typically the same for the unit regardless of the system (unless the system manager specifically provides a reason why the standard ID plan cannot be used).