I have a 2000 Silverado 4WD. When I am driving there is a metallic chattering when I have my foot on the gas?

Question

What could it be? When I let off the gas the noise stops.

Answer 1

check the heat shields around the exhaust pipes converter and the should around the exhaust under the hood they can become loose over time

Answer 2

I'm going to tell you something VERY funny. I have a Minivan that was doing the same thing. When I accelerated, it would make a ringing or chattery sound, and when I took my foot off the pedal it stopped. GUESS WHAT IT WAS? There was a stupid metal shroud around the catalytic converter that had popped loose just enough to vibrate against the tailpipe whenever the van accelerated! It was as simple as just bending the metal back away from the pipe! I hope your problem is as simple! Good luck!

Answer 3

Most likely it is valve clatter from too low an octane gasoline. As a test let the tank get low - nearly empty - then put 2 gallons of 97 octane in the tank and drive it a couple of miles - the valve clatter should go away. If not then there is another problem which you should have checked out.

Answer 4

your engine is pinging/knocking due to premature ignition in the cylinder. pinging/knocking happens when the fuel in the cylinder explodes before piston rises all the way up. this blows a small hole in the head of the piston and, if left unchecked, will eventually destroy your engine.
this can be caused by many things. if it's a 2000 i would generally rule out carbon build up if you have kept up with regular oil changes and tune ups. dirty oil and bad spark plugs can cause pinging. fuel injector problems can also cause pinging. a very common cause is using the wrong octane gas. high perfomance engines are often designed to run on high octane fuel. octane numbers refer to the ability of the fuel to not fire prematurely, thus causing the pinging you are hearing.
check your owners manual are the gas guage in your vehicle. iit should say what octane fuel is recommended. if it recommends 92 and you're using 87 that could be the cause.
if it's not the fuel then i would take it to the shop right away as you can destroy the engine rather quickly if you leave the problem unchecked.

Answer 5

The Engine may be Pinging due to a number of factors, most
likely the need for better fuel or possible carbon build up from use of Improper fuels

Answer 6

i own a shop and you need to check the u-joints in it,this could be what your hearing,also a bad wheel bearing will do this since it is an accelerating problem ,it would be something that's under a strain when giving it gas but check all the wheel bearings and the u-joints ,if it not them at least you can rule them out,good luck with it hope this helps.

Answer 7

i like do it yourselfers. You people supply me rather some solid paintings on the dealership. All i will say is shop up the forged paintings. We savor your loss of understanding what your doing. My wager is to procure 2 clowns who have no concept what they're doing, the two get a similar 2 clowns to undo what they did or tow it to the dealership or restoration save & have them restoration it

Answer 8

Sometimes the fuel injection causes a chatter like the valves rattling- make sure the grade of fuel you use is high enough to run right.

Answer 9

sounds like the cover on the Cadillac converter or heat shield on your exhaust could be loose or rotted. check them out to be sure.hope this helps.

Answer 10

detonation, you are going to have to use a higher octane gas in it or take it to the shop and have the timing checked.