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Hey I was looking around the site, gm parts and couldnt find the exact part, I thought i did but it turned out to be wrong. does any one know the part name or number?

hey does any on know thename or number of the part that is needed to fix the problem, and also a how to take apart the dash would be nice thanks

Hey,

My CEL turned on just recently and the car is pulsating, reving. Not sure if it is because of the cold or what but I think its the O2 sensor.
Any thoughts.

Edit: Just today the Light went off after 3 days, maybe the cold i do not know. Any suggestions