Wondering if could be a vac-leak not a sensor?

where can i seize a vac hose digram 88-94 c2500

could a vac-leak cause a rich condition too, and could effect
a faulty o2 sensor code blink code 33 and 45

How do i replace the drivers side...



Answers:    Correct the vacuum filter at the map sensor and it may correct itself.If you have the plastic vacuum lines check completely closely for cracks.Also check wiring at map sensor.Delete codes by disconnecting the battery-operated for a couple of minutes.

What should ido ?


If you have a vacuum ooze, the O2 sensor should pick it up and richen the mixture. But there is a contain and it can only budge so far.

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