how often should the transmission fluid be replaced
on 2008 Pontiac Grand Prix

how often should i replace transmission fluid

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1 answer
Gm used a fluid called Dex III. Gm recommends changing it around 100000. Most other vehicles it is recommended to change it every 30000. here is an article that explains more in depth.
http://autos.yahoo.com/maintain/repairqa/transmission/ques123_0.html