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Why would my 2003 trailblazer idles rough when heater is turned on?
Wiki User
∙ 16y ago
Probably a dirty throttle body. For a complete cleaning procedure with pictures join our enthusiasts forum at
www.trailvoy.com
It is free and informative!
Wiki User
∙ 16y ago
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You had your cabin air filter changed but still idles rough?
The cabin air filter can not cause a rough idle. It only filters the air for the ac/heater.
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