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2012 GMC HD2500 Duramax 4WD
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Discussion Starter #1
PO 606, tried to look it up here; said invalid number. Any help? Will double check tomorrow. No power loss, but headed out on a long trip next week and concerned-
 

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2012 GMC HD2500 Duramax 4WD
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Discussion Starter #3
Tried that first; after your reply, I tried it again in the DTC tool in the sticky- same result? Any idea what it means? A go to the stealer item?
 

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LBZ LLY Engine with Rough Idle, Poor Performance, Black/White Exhaust Smoke, MIL/SES Light On and One or More of the Following DTCs P003A, P060B, P0230, P0403, P0401, P0606, P2146, P2149, P2152, P2155 #06-06-04-066 - (12/19/2006)



Models: 2006-2007 Chevrolet Express, Kodiak C4500/C5500 Series, Silverado Classic

2006-2007 GMC Savana, Sierra Classic, TopKick C4500/C5500 Series

with 6.6L Duramax ™ Diesel Engine (VINs D, 2 -- RPOs LBZ, LLY)




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Condition
Some customers may comment on an illumination of the MIL/SES with one or more of the following symptoms:

• Rough Idle

• Poor Performance

• Black/White Exhaust Smoke

Upon further investigation, the technician may find one or more of the following DTCs stored in the ECM:

• P003A: Turbocharger Boost Control Position Not Learned

• P060B: Control Module Analog To Digital Performance

• P0230: Fuel Pump Relay Control Circuit

• P0403: EGR Solenoid Control Circuit

• P0401: Exhaust Gas Recirculation Flow Is Insufficient

• P0606: Control Module Internal Performance

• P2146, P2149, P2152, P2155: Injector Positive Voltage Control Circuit Group 1-4

Cause
This condition may be caused by a calibration issue.

Correction
Important: If the calibration update was for DTC P0403, then follow the service procedure in this bulletin to ensure that the P0403 code has been eliminated.

If routine diagnosis using SI does not reveal any obvious cause for the DTCs setting, then reprogram the ECM.

Reprogram the ECM with the latest calibrations if the above concern is encountered. An updated ECM calibration is now available to address this concern. This calibration, or any that follow, is designed to address this concern.
 

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2012 GMC HD2500 Duramax 4WD
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Discussion Starter #5
Appreciate the reply, guess I better take it in, in the morning. Didn't notice any problems other than engine light coming on. Will pull hypertech out today. Thanks, Shep
 

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shepcal;1570735; said:
Tried that first; after your reply, I tried it again in the DTC tool in the sticky- same result? Any idea what it means? A go to the stealer item?
Just for future reference, DTCs are a letter followed by 4 numbers. You should have entered "p-zero-six-zero-six".
 

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2012 GMC HD2500 Duramax 4WD
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Discussion Starter #7
Appreciate the replys, but now seem to have another problem. Went to pull Hypertech program out and it says I must remove codes first. If I do that, how will dealership know what the problem is? Headed out on a trip next Thursday, so don't beleive removing the codes, pulling the program and driving it till it codes again, then take it in, is an option. Any ideas?
 
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