05 Trailblazer whining sound

09-27-2011, 05:42 AM
I have a 2005 2wd trailblazer with about 100k miles. When the car first starts for the day it has a loud whining sound for about 30 seconds. Sounds like it is coming from transmission. After the 30 seconds all is good. It has been getting progressively worse. Almost sounds like a jet engine. The sound will sputter and few times and stop. Please help. Its not the clutch fan or belts. It definetly from the back side of the motor.

09-27-2011, 06:42 PM
Tough to tell from here, no? Someone has to listen to this onsite for any meaningful advice. A partially clogged fuel filter could do this or as you say could be in the trns.

Tech II
09-28-2011, 09:52 AM
Use a mechanic's stethescope to pinpoint?

04-04-2012, 10:14 AM
I overhauled the tranny and it was in the torque converter or the gear clusters. oh well its fixed $1500 later

04-06-2012, 04:52 PM
I currently have the same thing, same car, less miles. Its the secondary air injection pump. Valve is also bad. Comes with a check engine idot light. Pump is located directy under drivers sead next to the frame rail of the car. Part of emission contol system.

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