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2005 GMC Sierra 2500 HD SLE 6.6L Hesitation, MIL Lamp on
Posted to GM Driveability on 8/1/2009 7 Replies

This truck came in with complaint of low power on acceleration and heavy black smoke. I connected the Tech 2 and retrieved codes P0101, P0299, P0401, and P0404. I inspected the air intake system for any leaks or loose clamps. Took truck for a drive and had ver...

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car Vehicle Data

2005 GMC Sierra 2500 HD SLE

VIN 1GTHK23255
Engine6.6 L / 8 cyl / DIESEL
Trans5-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsHesitation, MIL Lamp On
OccursOn Accel

Trouble Codes

P0101Mass Airflow Sensor Range/Performance
P0299Turbocharger Underboost Problem
P0401EGR System Insufficient Flow Detected
P0404EGR Control Circuit Range/Performance
Message Closed

car Vehicle Data

2005 GMC Sierra 2500 HD SLE

VIN 1GTHK23255
Engine6.6 L / 8 cyl / DIESEL
Trans5-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsHesitation, MIL Lamp On
OccursOn Accel

Trouble Codes

P0101Mass Airflow Sensor Range/Performance
P0299Turbocharger Underboost Problem
P0401EGR System Insufficient Flow Detected
P0404EGR Control Circuit Range/Performance