HZ GTS guages and speedo NOS

[prophecyaudio]

Vombil, did you buy this dash?

[jennie285]

All HZ's should have yellow. There are no 1977 model HZ Sandmans other than those handful built prior to the end of August 1977. Anything from 1st Sept onwards is a 1978 model HZ and at that model-year boundary is where changes normally happen.

Our yellow van is 1977 tagged
It also had a Yellow needle dash when we bought it which didn't appear to have been changed from new

[bobsmith380]

GM PT No. 9946767 is correct for yellow needle GTS clock. I'm looking at one right now.

[HK1837]

Our yellow van is 1977 tagged
It also had a Yellow needle dash when we. Ought it which didn't appear to have been changed from new

It is a 1978 model though Jennie. And should have a yellow needle dash. I think the HZ's in the Sandman brochure have white needles and they will all be 1977 model year HZ's

[Dr Terry]

This 'model year' confusion has been going on for years.

In the US all new models are released in their Autumn (Fall) around September. Mid year models are released in Mar/April (like the 64 1/2 Mustang).

The GM model year begins on September 1, although this sometimes varies if a new model needs to be released earlier or later than this date, for production scheduling reasons.

What Byron is trying to get across is that HZ Sandmans produced between Sept 1 & Dec 31 in 1977, are considered by GM to be 1978 'Year Models'. Likewise those produced between Sept 1 & Dec 31 1978 are called 1979 models. The sixth letter in the VIN will tell which model year it is.

It's commonplace in modern cars to see things for example like, MY09 even when the car was actually built in 2008.

So we have to differentiate between the car's 'Model Year' (MY) & when it was actually built, they often differ.

Dr Terry

[Paddy_77HZ_Ute]

This 'model year' confusion has been going on for years.


The GM model year begins on September 1, although this sometimes varies if a new model needs to be released earlier or later than this date, for production scheduling reasons.

What Byron is trying to get across is that HZ Sandmans produced between Sept 1 & Dec 31 in 1977, are considered by GM to be 1978 'Year Models'. Likewise those produced between Sept 1 & Dec 31 1978 are called 1979 models. The sixth letter in the VIN will tell which model year it is.

So we have to differentiate between the car's 'Model Year' (MY) & when it was actually built, they often differ.

Dr Terry

Ok, so it looks like the Rego plates I put on my ute aren't quite right, it's a 78 Model, not a 77.





Built in 77, sold in 77, that'll do me.

[HK1837]

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Well it is 1977 complianced! Technically though it is a 1978 model HZ. BUT here's another spanner: 1977 complianced HZ's seem to all have AHZ chassis numbers whereas 1978 complianced HZ's are BHZ, so there is another ADR change there around the start of 1978 that means 1977 complianced but 1978 model HZ's are a special little subset of HZ with more than one little oddity. Although this isn't uncommon either, early HQ, early HJ are also unique compared to the rest of the series. The truly unique cars though are always the pre-volume production examples built for brochures etc.