GM FWD Transmission ID Charts
On the rear of the trans there should be a metal tag affixed to the case that looks like this:
Click a year below to view the information. You must have Adobe Acrobat Reader to view.
4T60-E
1991
1992
1993
1994
1995
1996
1997-99
4T65-E
1997
1998
1999
2000
2001
2002
2003
2004
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