Last post on Jan 15, 2013 at 11:27 AM
You are in the Chevrolet Silverado & GMC Sierra
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Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Silverado 2500, Truck
#12 of 14 Re: Noise at start up [rayt2]
Jan 14, 2013 (5:50 pm)
Ok with all this information I've been givin let me start by saying the problem the whole time was bad cat's....when they finally pluged up anough that truck gave a po420 code noise is gone dealer replacing cat's as I type hope it is fixed for good this time....hope this helps others out with their trucks
#13 of 14 Re: Noise at start up [chevy_sucks1]
Jan 15, 2013 (11:27 am)
It's great to hear that they've found the cause, chevy_sucks1! Let us know how everything is running after the repairs!
Sarah, GM Customer Service