Silverado Help

[Relentless]

I am trying to work on a 2004 silverado, I am having an issue and was wondering if someone might be able to help me via PM or in this thread if you don't mind.

[neospeedo]

sure post your issue, i work on these daily

[clusters]

As do I and know them inside out and backwards.

[XmoDDeR]

Sure ill join this post hit the group with ur issue

[clusters]

While we're waiting, a tip for everyone on these 2003-2006 GM trucks. No speedo and odometer not counting, no check engine light and transmission shifts fine (rules out bad VSS). The problem isn't in the cluster, it's in the VSS circuit from PCM to cluster. Seen a couple with aftermarket stereos wired wrong, VSS is used in factory radio for speed controlled volume. Another with VSS circuit grounded somewhere, didn't bother chasing it, just ran a new wire from PCM to cluster. A bad factory radio can also cause this, seen once.

[Relentless]

I am trying to program the mileage for the truck, I bought just a basic eeprom programmer that said it was compatible with a 25 series chip but it does not read. I was wondering what hardware is compatible with the 25020? My other question is that while reading through the forum here it "appears" as though the function of the trans temp is also stored on the same chip or is it on the other similar chip nearby? I'm assuming once I figure out where that data is stored I can dump a file from a cluster with trans temp to turn it on?

The original cluster was stolen out of the truck after I had put an escalade kit on it and had the dealership program it for the trans temp gauge. I have a cluster in it now with almost 300k miles and at first I was just wanting to change the mileage back to what the truck actually has but it seems like it's possible to program the other features as well. It would be much easier to pay someone again but I guess I like doing things the hard way, I have converted this truck to power windows and locks and auto air, so I might as well figure this out too.

[clusters]

Basic programmer may not work for that, depending on what it is, I have seen a lot corrupted by cheap programmers. The chip is a S95P02 right beside the display. Cheapest solution for doing these is a Digiprog, under the Avalanche option for the mileage, then Hummer H2-2007 for the hours. With Digi you can clip right to the chip without removing.

To turn different features on and off, like the DIC is not in the eeprom, it's in the processor flash. Some clusters you can't add a stepper motor for the trans temp without programming the flash but if the cluster came with a trans temp gauge it should be be plug and play.

[clusters]

I should add, the 25020 programmer will probably read the chip, but may not write correctly, then you have a corrupted eeprom. If you get a good read, you can repair the dash using a 25020 from a 99-02 dash, and write the file to it. Just be very careful if you need to unsolder the eeprom, the pads are very fragile and come off easily if overheated.

I know because I got stuck when first starting and that's how I fixed it. lol

[Relentless]

I'm assuming I'd need a tis subscription to reflash the processor?

This is the chip this cluster has, I actually found this forum while trying to figure out what series the chip really was

[clusters]

You can do it if you have a J2534 pass thru device and TIS2000 program, which is available all over the web for free, covers up to 2007. I don't flash clusters, but the trick I believe is to find the right cal number. Someone else may chime in on this part.

That is the correct chip in your pic.

[Relentless]

I very much appreciate your help, it would be awesome if someone does know about the flashing.

I have a copy of the tachosoft 23.1 that I was going to use to change the mileage and hours if I could get the programmer to read and write properly, I might try with a different computer tomorrow.

[Speedoman57]

try to lift pin 4

[Speedoman57]

try to lift pin 4

[Relentless]

I do have another question. Before I got the cluster I have now, I bought one that didn't work and I thought it needed the resistors to the right of the gear display to be resoldered because I had to do that to my original cluster. However, it didn't change anything, nothing works except the back lights. Any ideas?

[neospeedo]

if you have a working board in your truck why go back to the non-working board?

[neospeedo]

i can honestly say that some boards are not rebuildable, just good to save parts

[clusters]

I do have another question. Before I got the cluster I have now, I bought one that didn't work and I thought it needed the resistors to the right of the gear display to be resoldered because I had to do that to my original cluster. However, it didn't change anything, nothing works except the back lights. Any ideas?



Good luck.

[Relentless]

I did reflow all of the resistors(is that what they really are? I'm not privy on electrical components) But I did not do the little red coils, I will give that a shot. Thank you guys, you're awesome!

[Relentless]

if you have a working board in your truck why go back to the non-working board?

I thought about selling it to offset some of the cost of buying the things to change the mileage in my IPC now.

[neospeedo]

sounds like a good idea! Try performing those repairs just remember that if it doesn't work after that, then you might as well consider it not rebuildable unless you have a speedo shop close by that can recheck it for you. But then again, that may in most cases be an extra charge.

[Relentless]

Should I just use a GQ4X for the mileage?

[Relentless]

Well, I did get a gq4x and I used tachosoft to tell me what data to change and when I try to enter 191,256 miles into the eeprom according to what tachosoft says, the cluster displays 118,860. I've figured out a lot by reading and trial and error with this but I don't know what to do now

[clusters]

1D 2E is around 191245 miles. Look closer at the TS calculation window, you should be able to figure it out. lol

I'll bet you used 12 22.

[neospeedo]

191256 Kilometers = 118840.969 Miles. Try 307796 and u will get 191256 miles :cocksure: Tacho is giving u results in KM.

[Relentless]

1D 2E is around 191245 miles. Look closer at the TS calculation window, you should be able to figure it out. lol

I'll bet you used 12 22.
Yes, I did use 1222, I saw that it was in kilometers but I thought that it didn't matter because it was just a number, haha, guess that's what I get for assuming.

[neospeedo]

If you want to do hours, look under Chevrolet Tahoe in tachosoft :listen:

Work hours are stored in next lines:0050: xx xx xx xx 0C 5D xx xx xx xx xx xx xx xx xx xx

[clusters]

Hummer H2 in TS will calculate the hours properly for all 2003-2006 GMT800 trucks.

Unless it's over a certain number of hrs, then there is another location to correct.

[Relentless]

It worked! You've both been a tremendous help through this, I appreciate it a lot. Once I figure out this programming deal I'm not sure what I'll move onto next haha

[Relentless]

So, I repaired the cluster I had that way blacked out, it was the little red coils needing reflowed! I was running it in my truck just as kind of a test to make sure it wasn't going to have any issues. Now, it seems like it's draining my battery, I googled it and it seems to be a rather common problem. How many issues can these things possibly have! This is nuts


Also, is there a way to donate to the site? I appreciate all of the help i've gotten, I would like to contribute

[clusters]

Cool..........................

[neospeedo]

if post 17 dont work then you may have to live with post 16

[clusters]

if post 17 dont work then you may have to live with post 16

Absolutely, then he has a spare to experiment on. lol

[Relentless]

These things are nuts. I will look at it when I get off. Thank you guys....again, haha. Is there a donation link to paypal or something that i'm not seeing?

[neospeedo]

good luck! :beer:

[lwood]

hi GM cluster masters
what LED are you guys using to to upgrade bulbs..????
for 03-06 what LED?
and for 07-13 what LED?

[Relentless]

I used 5mm flat led's in my cluster. 07+ uses plcc4 3528 common cathode

[lwood]

I used 5mm flat led's in my cluster. 07+ uses plcc4 3528 common cathode
the flat head for wider lighting??

[Relentless]

the flat head for wider lighting??

Yes, I cut the plastic piece off and trim the anode and cathode down so it is closer to the cluster board. While changing colors and what not in my cluster, some of the led's had a resistor on the anode/cathode and some had a tiny resistor surface mounted to the bottom of the pcb under the smd. When I had the kind with the resistor on the anode/cathode, I just bent them around. I have changed the color in my cluster 5 or 6 times.

[lwood]

Yes, I cut the plastic piece off and trim the anode and cathode down so it is closer to the cluster board. While changing colors and what not in my cluster, some of the led's had a resistor on the anode/cathode and some had a tiny resistor surface mounted to the bottom of the pcb under the smd. When I had the kind with the resistor on the anode/cathode, I just bent them around. I have changed the color in my cluster 5 or 6 times.
what Resistor to use??
is it true that different color LED need Different Resistors?
i was thinking of using 560ohm 1/4W resistors.

[Relentless]

what Resistor to use??
is it true that different color LED need Different Resistors?
i was thinking of using 560ohm 1/4W resistors.
Yes, that's true. That's a basic principle of led lighting. The led's I use come with the proper resistor already attached. I do not like the way that the dome shaped regular led's emit light, too many hot and cold spots for me.

[Relentless]

Well...I sold the cluster that I had fixed and I was changing the mileage for the guy and I accidentally hit "auto mode" after it was showing all zeros in the code box. It looks like it overwrote all of the code because when I power it up it only shows the mileage, it no longer has the steering wheel controls or even the trip meter. I found a bin file on here for a 2005 3500 and tried to write it to the chip but it keeps failing, here I was being all proud of myself and that quickly went away.

[Speedoman57]

What year and make is the cluster you are working on?

[Relentless]

2005, the chip doesn't say atmel on it like the one in my truck now, it just says 56585 xceq

I tried to read it as a 25020 and a 95020 and it fails on the verify not on the write. It won't let me erase it either.

[Speedoman57]

You are not reading the right chip. Look for the atmel chip in location u15 or u16 on the board

[Relentless]

Oh, the one in my truck was at U16 but on this board the atmel chip is on U15.

[clusters]

2005, the chip doesn't say atmel on it like the one in my truck now, it just says 56585 xceq

I tried to read it as a 25020 and a 95020 and it fails on the verify not on the write. It won't let me erase it either.

56585 is not the right chip, they moved the eeprom on later years to the right of the odometer.

[Relentless]

Yep, I see that now and got it, thanks guys a lot. I guess that's something to remember. I was stressing about that pretty bad, but once again you guys pulled through to help me out.

[randym91]

Hey Guys, sorry to revive an old feed but looks like there are several GM IPC masters here and I need some help. I'm working on an IPC from an 04 Chevy Diesel. I replaced the steppers but the RPM gauge is still acting up. I replaced this stepper twice and soldered it well so I know thats not the problem. The gauge constantly twitches; sometimes it will go up a ways but sometimes not. Any suggestions on what the problem might be?

[SPARTANAUTOWORX]

If anyone wants to program touch controls or get rid of the service brake booster issue all you need is SPS and a vin of a truck or suv that has steering controls.

I flash a lot of clusters with the correct cal for the vin to remedy the Hydoboost error. Takes about 30 secs in or out of the truck just need sps and pass thru.

[randym91]

Whats SPS?

[neospeedo]

Here's a great link for SPS

http://blog.obdtool.co.uk/how-to-install-sps-service-program-system-for-gm-tech2/

[randym91]

Thanks neospeedo! Would you have any suggestions to post #48?

[clusters]

Have you put the truck on a scantool and graphed the RPM signal? Tried another cluster in it? It may not be the cluster.

Look for corrosion on the back of the circuit board, little grey or black spots.

[Nymike]

Sps is a programming service/system from gm.

Sent from my HTC One_M8 using Tapatalk

[randym91]

I was bench testing it with a function generator so I'd assume the signal is not the problem. I will check for corrosion, great ideas! Thanks!


Sent from my iPhone using Tapatalk

[clusters]

When replacing the stepper motor, did you lift any PCB pads? Maybe a cracked trace, which can be repaired by one strand of wire wrapped on the pin and soldered to the small solder point 1/4" away. Try refowing the stepper driver chip as well, U27 right above the tach stepper.

[randym91]

THAT FIXED IT! The PCB pads all looked ok but I "bridged" each pin to eliminate the possibility of damaged traces and that did it! Thanks a ton!!!!

[lwood]

customer bought in a 2004 Silverado with cluster dead except the display has squares .. no needles move.. not warning lights turn on.. no nothing turns on except display with squares.. anyone know what needs to be done to fix this issue??
if you see picture that is truck turned on .. engine on.

[borshch]

customer bought in a 2004 Silverado with cluster dead except the display has squares .. no needles move.. not warning lights turn on.. no nothing turns on except display with squares.. anyone know what needs to be done to fix this issue??
if you see picture that is truck turned on .. engine on.
most likely the infineon mcu is dead. in cases like these I just replaced the entire dash

[adksigns]

I have a question, I am able to read my eeprom from my 2005 silverado cluster. I have a question, can I use the TachoSoft 23.1 to calculate engine hours...engine hours are listed under the Select Car button just not sure.

[jomberykaso]

I have a question, I am able to read my eeprom from my 2005 silverado cluster. I have a question, can I use the TachoSoft 23.1 to calculate engine hours...engine hours are listed under the Select Car button just not sure.

post your file here with exact original mileage and exact original hours, then put mileage you want

[adksigns]

post your file here with exact original mileage and exact original hours, then put mileage you want

Thanks for the reply, Jomberykaso

I figured out how to update the Mileage/Odometer already using TachoSoft Mileage Calculator and update the bin and upload to the eeprom, however it seems that it can also calculate/convert Hours to hex, but its not totally clear on how this is done. I was just looking for some direction . TachoSoft shows were in the hex to put the new calculation, just need to figure out the new calculation say 3500 hours = 4 digit hex.


683548

[jomberykaso]

post your file or a picture of file you read and i will tell you how to

[adksigns]

Here is my bin file, if you need the miles and hours I will have to re mount the chip and get those for you. Just le me know.

[jomberykaso]

when you ask for help here you always must post exact mileage and hours

[adksigns]

I will get that to you asap

[adksigns]

Odometer = 177231
Hourmeter = 6741.1 HR

[jomberykaso]

put new mileage you want and i will put the correct hours according to new mileage

[adksigns]

146000 Miles

[jomberykaso]

146000 Miles

Now press THANKS button located in the left lower part of this post.

683580

[adksigns]

Now press THANKS button located in the left lower part of this post.

683580

JomberyKaso, thank you for showing me the way...i've been searching for a while and I will pay it forward one day for others.

[Shosta3]

If anyone wants to program touch controls or get rid of the service brake booster issue all you need is SPS and a vin of a truck or suv that has steering controls.

I flash a lot of clusters with the correct cal for the vin to remedy the Hydoboost error. Takes about 30 secs in or out of the truck just need sps and pass thru.

I recently purchased a 2005 that has had a cluster replacement. My truck came with the uk3 rpo, but the replacement ipc was not flashed for dic. I was attempting to flash with tis2000, but was recieving error 000004. I tried to find some info on this error but it seems like GM is pretty tight lipped on the codes. I did see that aftermarket radios can prevent flashing of certain modules. So after removing mine I was able to flash all of 1024 bytes and then no more was written. So now that the cluster is dead and tis is unable to communicate with the module, can the ipc be reflashed, or sent to a shop to have just to the operating chip replaced as the eeprom should still have all of the correct information?

[clusters]

Unfortunately, it is a brick unless you can change the processor. But it will have to be flashed again lol

[Shosta3]

Figured as much. I dont have a spare cluster to scavenge a processor from. Is there a forum member or service that does that type of repair? Most I've seen only want to do steppers/ lights.

[clusters]

That is the problem, sourcing a replacement.

Best bet may be finding a replacement cluster, any 2005, 6, 7 (classic or GMC) should work fine. The only difference in a 2006-7 is the shifter is LEDs not VFD.

The 2004 down won't work properly, you will have a persistent battery light.

[xGmanx]

I think you guys know those clusters well inside out maybe u can take a minute and read my issue here ->>>
https://www.digital-kaos.co.uk/forums/showthread.php/904737-2007-Avalanche-odometer-correction?p=4148057#post4148057

[patrickmk3]

Hummer H2 in TS will calculate the hours properly for all 2003-2006 GMT800 trucks.

Unless it's over a certain number of hrs, then there is another location to correct.

hi could you help me out pleas.
i have a cluster with 445313 km .
but hours are not stored in line 0050
could you tell me the other position you mention in your post pleas.

greetings patrick

[patrickmk3]

anybody that can help me out ?