ticking noise from cabin filter area help

[2001tahoefuentes]

So my bro has a 2001 tahoe ls 5.3 and today we both heard this strange ticking noise coming from the cabin filter area as soon as he puts the key foward it starts and wen he turns the car on its starts ticking faster can sombody help me figure this out

 

[mfdrookie516]

Does it do it with the fan off? Sounds like there may be a leaf or piece of paper/plastic that has been sucked up in to the box and it making contact with the fan. Had that happen to my old truck.

 

[2001tahoefuentes]

No its with the fan off

 

[toeinc]

Sounds like a blend door actuator.

 

[2001tahoefuentes]

I might have to check that cus its annoying lol

---------- Post added at 09:42 PM ---------- Previous post was at 09:35 PM ----------

How do i change it

 

[ashelm]

My '92 Suburban does the same thing and it IS the blend door. Pack a lunch and tear into the duck work under the dash. At the same time I would put in a new heater core while you are there. They don't cost much and for the age you might as well. Scott

 

[2001tahoefuentes]

Is it that much work to change the actuator?