My GVM upgrade to 3550 kg also allowed a GCM upgrade. It was previously 2960 kg + 2500 kg tow capacity for the auto. It’s now 3550 kg + 2500 kg. Mod plate now shows 6050 kg GCM.
Printable View
Sept 2018..
Attachment 85162
I wonder if they've allowed your GCM upgrade because it's still well below the factory TD42 GCM.
I had the GVM of my '99 TD42T wagon upgraded here:
https://statewide4x4.com.au/
Happy with the work and the result.
The unladen ride is very comfortable.
The GCM is unchanged at 6540kg.
That was the case for the upgrade I had done (Lovells) - approval was for the 3L only. Mine is a 4.2. Found a VASS engineer who was familiar with the upgrade & with Patrols. Paid an extra $1200 on top of the cost of the upgrade. (Dynamic brake tests etc) & got the blue plate.