Breecher_7
01-30-2008, 09:18 PM
SERVICE - CHEVROLET AND GMC DEALERS
Subject: Information on Identifying Non-GM Calibration Usages for LMM Duramax Diesel Engines
Message #: VSS20081381
Corporate Bulletin Number 08-06-04-006 is currently available in SI.
Information on Identifying Non-GM Calibration Usages for LMM Duramax® Diesel Engine
Models: 2007–2008 Chevrolet Express, Kodiak, Silverado
2007–2008 GMC Savana, Sierra, TopKick
with 6.6L Duramax® Diesel Engine (VIN 6 — RPO LMM)
Power-Up Kit Detection
For 2007–2008 applications, an Engine Control Module (ECM) algorithm was implemented that records the engine calibration part number and Calibration Verification Number (CVN) for the last flash programming events. The ECM only records the engine calibration part number because it contains the parameters for increasing torque and fueling rates.
Customers may have re-programmed the ECM with a non-GM released calibration. Power-Up Kit calibrations change fueling and timing parameters and may contribute to the following vehicle symptoms:
• Poor Performance
• Black Smoke (This symptom is not valid for the 6.6L (LMM) diesel equipped with the diesel particulate filter (DPF). The DPF will trap black smoke
unless the DPF is cracked, melted or has been removed from the exhaust system.)
• Knocking Noise
• May Cause Engine Damage
Dealerships should remind their customers that engine concerns due to non-GM calibrations (Power-Up Kit) will not be covered under the GM warranty.
If a customer vehicle comes in to your dealership with possible symptoms from a Power-Up Kit, the dealership technician may now read the last engine calibration part numbers and CVN history using a Tech 2 ®.
The dealership technician would input each ECM calibration part number into the SPS/TIS2WEB CVN database to confirm the CVN history information. Refer to Tech♦2 path table in this bulletin to verify ECM calibration.
Tech♦2 Powertrain Output Controls Path Table for NON-GM ECM Calibration
1. Build the vehicle with the Tech 2.
2. Select F0: Engine Control Module.
3. Select F5: Module Identification Information.
4. Select F1: Programming History.
5. Turn Ignition On and Engine Off. Press ENTER Key to Continue.
6. Record the Calibration I.D. Numbers and Verification Numbers from the Tech 2 Programming History Screen.
7. From SPS/TIS2WEB, record the Calibration Part Number into the CVN Database. Get CVN.
• If the CVN does not match the CVN database, an unauthorized engine calibration part was flash programmed into the ECM.
• If the CVN matches the CVN database, we can assume a Power-Up Kit that flash programs engine calibrations was not used.
________________________________________
Message #: VSS20081381
Date Released: 01/29/2008
Recommended Distribution: Service Manager; Warranty Administrator
Dealership Contact: Powertrain Brand Quality
Subject: Information on Identifying Non-GM Calibration Usages for LMM Duramax Diesel Engines
Message #: VSS20081381
Corporate Bulletin Number 08-06-04-006 is currently available in SI.
Information on Identifying Non-GM Calibration Usages for LMM Duramax® Diesel Engine
Models: 2007–2008 Chevrolet Express, Kodiak, Silverado
2007–2008 GMC Savana, Sierra, TopKick
with 6.6L Duramax® Diesel Engine (VIN 6 — RPO LMM)
Power-Up Kit Detection
For 2007–2008 applications, an Engine Control Module (ECM) algorithm was implemented that records the engine calibration part number and Calibration Verification Number (CVN) for the last flash programming events. The ECM only records the engine calibration part number because it contains the parameters for increasing torque and fueling rates.
Customers may have re-programmed the ECM with a non-GM released calibration. Power-Up Kit calibrations change fueling and timing parameters and may contribute to the following vehicle symptoms:
• Poor Performance
• Black Smoke (This symptom is not valid for the 6.6L (LMM) diesel equipped with the diesel particulate filter (DPF). The DPF will trap black smoke
unless the DPF is cracked, melted or has been removed from the exhaust system.)
• Knocking Noise
• May Cause Engine Damage
Dealerships should remind their customers that engine concerns due to non-GM calibrations (Power-Up Kit) will not be covered under the GM warranty.
If a customer vehicle comes in to your dealership with possible symptoms from a Power-Up Kit, the dealership technician may now read the last engine calibration part numbers and CVN history using a Tech 2 ®.
The dealership technician would input each ECM calibration part number into the SPS/TIS2WEB CVN database to confirm the CVN history information. Refer to Tech♦2 path table in this bulletin to verify ECM calibration.
Tech♦2 Powertrain Output Controls Path Table for NON-GM ECM Calibration
1. Build the vehicle with the Tech 2.
2. Select F0: Engine Control Module.
3. Select F5: Module Identification Information.
4. Select F1: Programming History.
5. Turn Ignition On and Engine Off. Press ENTER Key to Continue.
6. Record the Calibration I.D. Numbers and Verification Numbers from the Tech 2 Programming History Screen.
7. From SPS/TIS2WEB, record the Calibration Part Number into the CVN Database. Get CVN.
• If the CVN does not match the CVN database, an unauthorized engine calibration part was flash programmed into the ECM.
• If the CVN matches the CVN database, we can assume a Power-Up Kit that flash programs engine calibrations was not used.
________________________________________
Message #: VSS20081381
Date Released: 01/29/2008
Recommended Distribution: Service Manager; Warranty Administrator
Dealership Contact: Powertrain Brand Quality