2004 CV8 Instrument Cluster Issue
Discussion
Hi,
Unfortunately this is a common issue. It's either the lcd panel failing or the driver chip. Mine is fading/getting hard to read and looking corrupted (04 model). Lots of talk about it on the Pontiac GTO forums especially.
The panels are soldered to the board, and the unit requires disassembly to fix. Unfortunately GM/Holden stopped making the clusters years ago, and the panel is not available seperately.
If you can trace a replacement console it will need to match the specification of your car or require a reprogramme. Unfortunately mileage is stored in the console so if you use a 2nd hand one it will be whatever that comes with.
Can possibly get hold of a new old stock part from either the US or Oz, and then get somebody to transfer the panel over but won't be cheap. I've taken mine apart before to have a look for anything obvious but couldn't see anything - and trying to calibrate the needles afterwards is a real pain.
Considering looking into getting the info displayed by some other means. Unfortunately dash data is not available via the OBDII port though.
Unfortunately this is a common issue. It's either the lcd panel failing or the driver chip. Mine is fading/getting hard to read and looking corrupted (04 model). Lots of talk about it on the Pontiac GTO forums especially.
The panels are soldered to the board, and the unit requires disassembly to fix. Unfortunately GM/Holden stopped making the clusters years ago, and the panel is not available seperately.
If you can trace a replacement console it will need to match the specification of your car or require a reprogramme. Unfortunately mileage is stored in the console so if you use a 2nd hand one it will be whatever that comes with.
Can possibly get hold of a new old stock part from either the US or Oz, and then get somebody to transfer the panel over but won't be cheap. I've taken mine apart before to have a look for anything obvious but couldn't see anything - and trying to calibrate the needles afterwards is a real pain.
Considering looking into getting the info displayed by some other means. Unfortunately dash data is not available via the OBDII port though.
Best bet is to source a used UK Monaro cluster with mileage close to yours.
The specification is the same on all the 2004 ones, the mileage will be the only difference with the exception of the 2004 VXR which the speedo is programmed to the 3:7 diff!
The later 2005 cars very much appear to use the same cluster, but I couldn't swear on it. All 2005 UK Monaro inc. VXR run the slower 3.46 diff and are programmed to that. One of those might be worth a punt.
What is your approximate mileage?
ETA: After reading the below, it looks like it isn't a straight swap between 2004 V2 and 2005 VZ Monaro!
The specification is the same on all the 2004 ones, the mileage will be the only difference with the exception of the 2004 VXR which the speedo is programmed to the 3:7 diff!
The later 2005 cars very much appear to use the same cluster, but I couldn't swear on it. All 2005 UK Monaro inc. VXR run the slower 3.46 diff and are programmed to that. One of those might be worth a punt.
What is your approximate mileage?
ETA: After reading the below, it looks like it isn't a straight swap between 2004 V2 and 2005 VZ Monaro!
Edited by Lincsls1 on Thursday 18th March 19:07
would a company who repair clusters not be able to help , even if parts can be difficult ? maybe this ? http://www.clusterrepairsuk.co.uk/repairlist
This is quite handy, not sure if you can set the mileage though. There are clusters available on eBay
https://m.youtube.com/watch?v=DNgECHPvewQ
Also good article here
https://forums.justcommodores.com.au/threads/vy-vz...
https://m.youtube.com/watch?v=DNgECHPvewQ
Also good article here
https://forums.justcommodores.com.au/threads/vy-vz...
Edited by anonymous-user on Thursday 18th March 18:44
Some useful info in that forum link - might actually be able to calibrate the dials properly now. 
As for finding a matching cluster - mine is an 04 VXR, which there aren't many of in the first place. Looks like the 05 onwards clusters are actually different pinouts on the connector even though the consoles look the same if I'm reading the forum link correctly? Things get a bit confusing between the VY/VZ and V2 references, and how they relate to the UK models.
The 04 VXR seems to be a pretty unique and rare car and only available for a year. The later cars are more numerous, but still not exactly a lot about.
As for finding a matching cluster - mine is an 04 VXR, which there aren't many of in the first place. Looks like the 05 onwards clusters are actually different pinouts on the connector even though the consoles look the same if I'm reading the forum link correctly? Things get a bit confusing between the VY/VZ and V2 references, and how they relate to the UK models.
The 04 VXR seems to be a pretty unique and rare car and only available for a year. The later cars are more numerous, but still not exactly a lot about.
I’d imagine the 04 VXR has the same instrument cluster as an 04 CV8, unless HSV specified their own? I know the speedo will be programmed for the different diff ratios though.
ie it’ll come under the VY or V2 designation, all cars built before September 2004 are V2 SeriesIII / VY, the factory was re-tooled for the VZ in August that year.
ie it’ll come under the VY or V2 designation, all cars built before September 2004 are V2 SeriesIII / VY, the factory was re-tooled for the VZ in August that year.
Edited by V88Dicky on Wednesday 24th March 08:43
V88Dicky said:
I’d imagine the 04 VXR has the same instrument cluster as an 04 CV8, unless HSV specified their own? I know the speedo will be programmed for the different diff ratios though.
ie it’ll come under the VY or V2 designation, all cars built before September 2004 are V2 SeriesIII / VY, the factory was re-tooled for the VZ in August that year.
Correct. ie it’ll come under the VY or V2 designation, all cars built before September 2004 are V2 SeriesIII / VY, the factory was re-tooled for the VZ in August that year.
Edited by V88Dicky on Wednesday 24th March 08:43
The 04 VXR cluster is just a regular V2 unit, but yes it is calibrated to the 3.7 diff.
Fitting a standard 04 cluster calibrated to a 3.4 diff to an 04 VXR will result in the speedo reading slow, e.g. indicating 70mph when actually GPS would record 72/73mph so no big deal as long you're aware of this especially in the lower speed limits.
Trouble is most cars read fast by up to 4/5mph which helps to stop you getting points!
I've found my standard 04 VXR is very accurate though, only 1mph variance across a huge range of speeds.
Anybody needing to do this swap can get the cluster calibrated correctly, with just the press of a button on a laptop. I would think MWP or Walkinshaws could do this for you, along with a load of other clever clogs in the Monaro/HSV scene.
Following on from this slightly old thread.....
Has anyone had any success in being able to retrieve the odometer reading over OBD? I have had the middle LCD panel out for nearly 10 years, which has not bothered me, but now the car is listed for sale on here, it would be good to be able to confirm the mileage. I have had a few folk try, but no-one has been able to find the odometer in amongst the various modules.
Has anyone had any success in being able to retrieve the odometer reading over OBD? I have had the middle LCD panel out for nearly 10 years, which has not bothered me, but now the car is listed for sale on here, it would be good to be able to confirm the mileage. I have had a few folk try, but no-one has been able to find the odometer in amongst the various modules.
I believe the Americans have figured out reading and setting the odometer, although naturally they aren't keen on publically sharing the information.
Do you have the VZClusterMod program and appropriate cable? If so, connect that up, have it display some of the comms (you can put in 'heartbeat' I think from memory
) and then post up a copy of it. It only needs a few seconds, it's just on a loop.
From there, might be able to work out the mileage for you, I don't know off the top of my head but I have the source code for VZClusterMod and have poked around it a bit, so with a bit of Googling I imagine I can find out what bits are the mileage
Do you have the VZClusterMod program and appropriate cable? If so, connect that up, have it display some of the comms (you can put in 'heartbeat' I think from memory
) and then post up a copy of it. It only needs a few seconds, it's just on a loop.From there, might be able to work out the mileage for you, I don't know off the top of my head but I have the source code for VZClusterMod and have poked around it a bit, so with a bit of Googling I imagine I can find out what bits are the mileage
Windy Miller said:
OK, cheers for this - New uncharted territory! Looking like it may need the ALDL cable - I do have here a Canalyst II USB/CAN converter but doubting I will be able to use that for ALDL. But worth a look in case it does.
Cheers for the pointer - Will see how it goes!
Instructions on the cable are here:Cheers for the pointer - Will see how it goes!
https://www.ls1gto.com/threads/vzclustermod-public...
I found a USB to serial converter on Amazon that worked, there's details in the FAQs I think, although that may be an old ebay link
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