High Pitched whine at cold start up. lasts about 30-45 seconds. Not affected by engine speed. After engine warmed up does not re-occur unless engine cools off say half hour or so. Seems to be located on front driver side. Did find info about replacement of the air emissions pump on a chev that seems to most look like it, but have not confirmed that it is characterized by a high pitched whine at startup as indicated above.
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2001 Cadillac DeVille Question: how to test emissions air pump and replace
Answer #1pushrod February 18, 2013, 00:16Master
Most likely drive belt//tensioner or driven componet, have your mechanic remove the belt to see if that makes it stop, may need to let him/her keep it a while.
Answer #2Greg's Orange Auto (15188 Answers) , Orange, CA - (714) 361-9386globalhelper February 18, 2013, 09:34Master
agree with wetry