The cluster reprogram was for '04 only. The reprogram procedure required what is called a VCI number from Techline. They won't be able to generate one for an '05 since it doesn't apply.
I did one accidentally and they gave me a VCI number for an '03 CTS clock losing time issue and it fried the cluster in the V I was working on!
Here is the VIN break:
Quote:
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Built Prior to VIN Breakpoint 40181396
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Anything after that, no good.
There is a PI out for '05, I'll copy it here, not sure if this is what will fix your issue.
Quote:
Subject: Engine Oil Temperature Reads High Or Improper Display Of Warning Message - keywords DIC display gauge IPC #PIC4508A - (10/30/2007)
Models: 2004- 2005 Cadillac CTS-V
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This PI was superseded to update model years. Please discard PIC4508.
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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Some customers may comment the engine oil temperature rises very quickly and remains high when they are not driving on long hills or performing aggressive maneuvers. In some cases the Oil Temperature Warning Message is displayed.
Recommendation/Instructions:
If the Engine Oil Temperature Indicator is always on, follow Engine Oil Temperature Indicator Always On (5.7L) Document ID# 1541697. If the oil temperature seems to rise quickly and remain high, install a redundant ground for the Engine Oil Level/ Temperature Sensor to the Instrument Panel Cluster ground G200 using the following instructions:
Splice a new length of .35 AWG wire into circuit 1550 (BK) near the Engine Oil Level/ Temperature using procedures in Splicing Copper Wire Using Splice Clips Document ID# 303646.
Run the wire under the Engine Harness protective sheath following the harness over to, and through the Wiring Harness Pass-through Grommet into the passenger compartment on the driver side.
Attach the end of the redundant ground wire to G200 behind the left kick pad using suitable eyelet terminal.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
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