HI there,
Yes, this bulletin has been out for a while. There are also 14 calibration updates to address knock concerns also, including a decarbonization process.
Besttoyou, c4c5
you are awesome! mine has had that noise every since i got the car and no dealer could tell me what it was. i'm taking the car in to the dealer asap to have them take care of this.
i'm not too impressed with chevy dealers. this is the fourth or fifth problem i've had that a dealer couldn't answer that i have figured out on this site.
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