Service VME - 6.6 LB7 Diesel Engine - P0102 , P0103 , P0236 Smoke Hesitation, Whistle , Hiss - kw acceleration drive DTC GMT560 GMT800 GMT4500 GMT5500idle low performance turbocharger whine
| Subject: | Service VME - 6.6 LB7 Diesel Engine - P0102, P0103, P0236, Smoke Hesitation Whistle or hiss noise |
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When servicing the vehicle with the VIN you entered, the following diagnosis might be helpful if the vehicle exhibits the described symptoms.
SERVICE VME
This is a service VME going out for all 2001 through 2004 Chevrolet Silverado, GMC Sierra 2500 HD, 3500 trucks with LB7 Duramax diesel engines, as well as 2003 to 2004 Chevrolet, GMC 4500 and 5500 trucks with LB7 diesel engines. This message is in regard to Duramax turbocharger noises or possibly a performance or a fuel economy complaint. Excessive turbocharger or whine noise could possibly be caused by a leak in the turbocharger system. The source of the leak can be identified by using the charge air cooler system pressure testing tool, tool number J46091. The noise will most likely be coming from one of the CAC system hose connections. The suspect hose connection should be removed to complete a visual inspection of the pipe or CAC inlet. If no damage or flaw is detected, reinstall with special attention to the clamp placement in tightening procedure. Note: the charge air cooler itself can be the source of noise and should be checked by following the pressure decay test instructions with J46091 tool. Any of these issues can cause a noise or performance or fuel economy complaint and may not set a DTC.
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Please follow this diagnosis 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. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance. This diagnostic approach was developed for the vehicle with the VIN you entered and should not be automatically be used for other vehicles with similar symptoms.
Models:
((2001 through 2004 Chevrolet Silverado) and (GMC Sierra 2500 HD and 3500 trucks with the LB7 diesel) and (2003, 2004 GMC C4500 and 5500 trucks with LB7 diesel) )
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