4L80E is always in drive


Asked by 4L80E Aug 11, 2020 at 02:09 PM about the 2001 GMC Sierra 2500HD 2 Dr SL 4WD Standard Cab LB HD

Question type: Maintenance & Repair

4L80e has no reverse.  Will drive in park, neutral, drive, 3, 2 and 1

2 Answers

Replace the reverse servo pin and the adapter. There are video's all over youtube.

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2001 GMC Sierra 2500HD

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