blazer making a clinking noise

99 blazer when driving makes a clincking sound through radio thought it was flasher but i was wrong after i replaced it any one have any ideas thanks

Does the noise seem to increase in speed as the motor speeds up?

[yes it does

You might check the ends of the coil wire and sparkplug wires...look for some white powdery residues and burnt, charred ends.

[i will do that thanks for you time