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1999 GMC Yukon SLT 5.7L Excessive Emissions, Poor Idle Quality, MIL Lamp on
Posted to GM Driveability on 11/14/2015 28 Replies

has anybody got any ideas for us we changed the head gasket and we have this 5 7 miss and it doesn't appear to be electrical and the vacuum seams tight. looking for help/ideas would be appreciated. It is running O K on bank 1 and bank two is running very rich....

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  Related Documents & Media  1999 GMC Yukon SLT

 
Message Closed w/FIX

car Vehicle Data

1999 GMC Yukon SLT

VIN 1GKEK13R8X
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Poor Idle Quality, MIL Lamp On

Trouble Codes

P0155Heated Oxygen Sensor (Bank 2 Sensor 1) Heater Circuit Malfunction
P0300Multiple Misfire Detected
Message Closed w/FIX

car Vehicle Data

1999 GMC Yukon SLT

VIN 1GKEK13R8X
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsExcessive Emissions, Poor Idle Quality, MIL Lamp On

Trouble Codes

P0155Heated Oxygen Sensor (Bank 2 Sensor 1) Heater Circuit Malfunction
P0300Multiple Misfire Detected