The AM/FM radio in my 2003 CTS faded to just

Remove the radio and have it repaired by one of the many online repair businesses, average cost about $250.

the operator guide in the glove box , covers time set.
all radios do that.
and if not normal, the antenna is broken or fell off the rear of radio.

if got static switch to FM ,
many AM stations, broadcase to am and fm same content.
so use FM. its static free. (by design) but does fade sooner.
you can in fact hear AM station 12,000 miles away it night
called super stations, 50,000 watt stations. ive done this many time.

did you try another car, in same spot , and same station?
are you in under ground parking?

The antenna plugs in to the back of th radio. it could have came loose and fallen out. When you pull the radio and if the anteena is secure in it, then you have lost the receiver in the radio, very rare, Replace the radio at this ppoint.

maybe antenna is dislodged from the connector.

check antenna cable connections at radio & antenna.suspect power antenna if equipped.

Something to do with the reception or antena system..
Or the tuner in the radio is failing..

Rate well ;o)

replace the attenna if that does not work the radio is the problem

try a signal booster from Canadian tire

the cause of this is a defective is due to one of the following:
1. Antenna is defective or Antenna coax lead to radio shield ground
2. Antenna ground is dirty or corroded
3. Poor radio chassis ground.

speaker wires loose or faulty check connections;possable speaker plug behind radio loose.adrian