Sounds like a bad earth connection around the rear light cluster.
in the steering colume you must pull stering wheel to get to it
the clicking sound is the blinker. when you signal to turn with your blinker the light flashes and makes a clicking sound.
Yes, But it won't look right. 1988 is when chevy redesigned the body / changed it.
Yes, They will bolt right up.
yes
your right Chevy is the best truck known to man
Yes, It will bolt right up.
There is something not right with the engine.
Who said it won't ? It will fit right in there with NO problems
Only depends on the engines. If they're the same engine then ya they'll bolt right up.
Right hand
It should be behind the right front turnsignal.