2006 GMC Envoy P0455 EVAP Large Leak

2006 GMC Envoy

GMC Envoy On the 2006 GMC Envoy, the P0455 is a very general code that simply states there is a large leak in the EVAP (emissions control/recovery) System. First place to start here is with the fuel cap. Check the underside of the fuel cap for any cracks or signs of defects that may keep the cap from sealing correctly. If there are any doubts about the inspection of the cap, replace it. Keep in mind, you will need a cap that meets OE Specs. Those “universal” or “locking” fuel caps…

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2002 GMC Envoy Ambient Temp Sensor

2002 GMC Envoy

GMC Envoy On the 2002 GMC Envoy, when the outside temp display is not working, this is most commonly due to a problem with the Ambient Air Temp sensor. The air temperature sensors are a 2 wire negative temperature co-efficient thermistor. As the air temperature surrounding the sensor increases, the sensor resistance decreases. The sensor signal voltage decreases as the resistance decreases. The sensor operates within a temperature range between -40°C (-40°F) to 101°C (215°F) . You can find the sensor under the hood mounted to the radiator fan shroud.…

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