04BlackGmc

iTrader: (18)

mine truck does this sometimes too. When i have the cutout closed i can hear it alot bettter.

TravisH

iTrader: (1)

to me it sounds like there are a crapload of pebbles in my motor....

Timothy Russell

The rattle you hear is detonation caused probably by A: too hot a plug. B: too large of plug gap. C: the advance curve causing the plug to fire too soon.D: clogged fuel filter. E: any combo or all of the above. When I first bought my truck, it didn't make this noise. But after I changed plugs & wires, it started doing it. So, I'm gonna change the plugs and make sure I put in a set of factory heat range plugs with oem gap setting and change the fuel filter, then see if that cures it. If not, have to get the computer reprogged.?

Khaos.

iTrader: (3)

If he didn't fix it after 13 years, I'd say he'll never end up fixing it

Mark Johnson

iTrader: (1)

I don't have any rattling, tapping at the upper rpms- but I do get a ringing. Would a better damper really help..........