Mine is "GCZ32 508336". So I don't know why I have the extra character... I think it is the important one, since it is the one on the firewall.
Mine is (in case it helps): Type: E-GCZ32 Chassis Number: GCZ32 508336 Model Number: KRGZ32JSHE6 Color/Trim: 732 G Engine: VG30(DETT) 2960 Trans Axle: RS5R30A RD37