Chevy Avalanche Repair Problems Answered

2004 Chevrolet Avalanche. Warning lights: transmission hot.
2004 Chevy avalanche having trouble going into overdrive local mechanic claims that it might need an overhaul on transmission.

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How Things Work

Air Conditioning System Operation

The A/C system provides the following features:

Cooled or dehumidified air for the comfort of the occupants
Power ventilation
Windshield defrosting
Side window defrosting

During most operating conditions, outside air enters the vehicle in the following manners:

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Common Engine Codes

Code P0171 Fuel Trim Error

The powertrain control module (PCM) controls the air/fuel metering system in order to provide the best possible combination of driveability, fuel economy and emission control. Fuel delivery is controlled differently during Open and Closed Loop. During Open Loop, the PCM determines fuel delivery based on sensor signals, without oxygen sensor (O2S) input.

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