Two problems related to engine clicking and tapping noises have been reported for the 2001 Chevrolet Silverado. The most recently reported issues are listed below.
The consumer states that there is a clattering noise during acceleration/pinging, up inclines and under load weight. And found excessive valve clattering on acceleration and decarbonized the valves, but were unable to resolve the problem. (the vehicle was released with the knowledge that the pinging still occured) the consumer is giving Chevrolet the oppurtunity to resolve the problem in a timely manner, and if these problems are not repairable, then he is expecting a refund of the purchase price with interest.
After only having this new truck for 2 days the transmission was taken out of it due to a ticking noise in the engine. The mechanic was advised by gm to take out the transmission and replace a flywheel. After 2 weeks of waiting for a part I picked up my truck. The next day the noise was back. I have had 2 gm reps listen to the noise. The secound rep told me that it was "entrained gasses" and that there was nothing they could do about it. I did not purchase this truck making the noise and do not want it anymore after the transmission has been taken out.