1. My 98 Blazer has a ticking sound that sounds just like the blinker is on (but it's not). Sometimes it goes real fast. Usually quits for awhile and comes back for no apparent reason(s). I had the auto shop at my school replace some "box" where the sound comes from. It was down by the floor on the passenger side. No help. They didn't know what else to do.


2. Sometimes it sounds as if water is gushing around behind the dash.

Any advice on either?

 

could be your ac clutch, and your heater core.......make sure there is no air in the system, and top up the res.

 

my guess is that you have water in your coolant system, or are low on coolant.

 

LOL... Sure is water in there. Coolant too! haha.

I had to pick. It was too funny.

Anyway, I agree that you probably have AIR in the cooling system that is causing the noise you are experiencing. The gurgling, not the ticking...

 

I was low on coolant...got that under control i believe...now as far as the ticking goes???? I know someone that says they know of another blazer that does the same thing...so, i'm wondering if it's common?

 

Check the cruise control cable on the engine. Make sure that the vacuum line from the PCV valve in the driver's side valve cover isn't resting on the cruise cable. If it is, then you may be hearing the PCV valve operating...

 

ha ha, pick on the idiot. just tryin to help. maybe he should check the air in his tires.

 

That Fast Intermittent Ticking Sound you are Hearing is usually the first sign of a bad MULTIFUNCTION SWITCH.....