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C5 Finding and Fixing a "Tweet"

R

rwkay57

Guest
Sometimes I can hear a high-pitched "tweeting" kind of noise in the cabin of my c5 Coupe. It seems to be coming from in front of the driver.
The sound is a little more pronounced when the car is cold, but is sometimes heard even when fully warmed up. The sound is not usually heard during idle, NEVER when I stop the car to have a listen under the hood. The sound seems to be intensified by vibration when car in motion. Sometimes it goes away for a week, sometimes its heard every day for a week.

I've ruled out serpentine belt and heater/ac fan.

I'd be grateful for any advice. The "tweet" drives me nuts!!

Thanks,
RWKay57
 

B/STOCK

Well-known member
Joined
Oct 24, 2001
Messages
187
Location
RI USA
Corvette
2000 Magnetic Red Vert & 2015 DSOM Coupe Z51-3LT
Have the same noise in my 00. I can't find it the source either. Sounds like a altenator bearing. Doubt if thats the problem but its a good way to explain the sound. I am sure someone can answer this better than me. Good luck Michael
 

c4c5specialist

Technical Advisor
Joined
May 29, 2001
Messages
3,682
Location
New Haven, Ct. USA
Corvette
Nope, but someday.
HI there,
On the 98, there was a bulletin issued for a distorted dust shield on the idler pulley.
The noise would mostly happen when cold.
I would have your corvette tech research the issue.
Besttoyou, c4c5:hb
 

99WhiteC5Coupe

Well-known member
Joined
Jan 19, 2002
Messages
293
Location
Cincinnati, Ohio, USA
Corvette
1999 White Coupe
rwkay57,

My 1999 C5 coupe had the same noise. The dealer replaced the idler pulley with a revised/updated part as referenced by c4c5specialist. The new idler pulley stopped the squeaking noise.

Have your dealer refer to TSB #99-06-01-007. The revised idler pulley part number is 12564401.

Good luck.

99 White C5 Coupe
 

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