End of shift engine clatter

[Diesel Crat]

I'm sure this has been discussed somewhere. if there's a link please redirect me. Thanks.

My 02 GMC engine clatter gets a much louder and rattle sounding close to the end of a shift under mild to heavy acceleration.

Brothers 01 Chevy does it too but he said it got better as more miles were put on. He's over 80K.
I'm at 32K.

[Dawg]

It most likely the pilot injection shuting off, which is normal. I'm not an expert, but the pilot injection gives a small squirt of fuel before the actual combustion which helps keep our trucks quiet. It can only do this so fast, so once a certain RPM/load is reached it shuts off and you get the normal diesel sound. Someone else will be able to do a much better job of explaining, but I think I hit the basics.

[Modified]

See Pilot Injection info below:
http://forum.thedieselpage.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=7;t=004864