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Why does my 05 Trailblazer sound like a jet engine in the transmission area when started for 45 seconds even if the engine is turned back off?
Wiki User
∙ 12y ago
Its not the torque converter. It's the electric air pump found on the inside frame rail on the driver's side roughly below the driver's seat. This air pump is the EGR system for these vehicles. What you are hearing is normal.
1.) Get the Torque converter checked.
2.) Possibly a problem with the fan clutch. Trailblazers have had a long history of the fan clutch failing on when heating up, and causes the fan to always stay on. Eventually, you may get a check engine light with the code referring to a fan clutch over speed.
It can be replaced by the DIYer, but requires some specialized tools to remove it.
Wiki User
∙ 12y ago
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