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Question
rngr746
My vehicle is an 07 Sierra Classic with the 4.3L and 56,000+ miles. I developed a noticeable static problem on the FM band only of my after market
Pioneer AM/FM/ CD player some time back. WhenI fianlly got it into the shop it was discoverd that my alternator was going out and that I had a
poor ground for my computer. The alternator has been replaced and the ground repaired. I still have a static on the FM band ,and
again, none on the AM band. I was told the radio needs to be replaced. Also, I have ancedotal information that the truck has an FM amplifier that
may or may not be the problem. Can anyone provide me with information on where this amp is located and can it be tested to check if it is good or
needs replacing?
It is the sound of my plugs firing, rapid stacatto in nature with the frequency rising with engine rpm's. Additionally the plug wires were changed
in April at 53,100 miles. The new plug wires are Taylor 8mm Pro Series. The mechanic and his assistant that did the work had both never heard of
or experienced the problem I described. At the time the alternator was diagnosed as going bad it was putting out 15 volts. This 15 volt output with
a bad ground led them to believe the problem was somewhere else besides the plug wires.
Can you suggest a solution?
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