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Section 152 (Automatic Transaxle - 4T65- E - DTC P0752 To DTC P1822)
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DTC P1820 (3.8L)
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Notes
DTC P1820 (3.8L): Notes
WARNING:
This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Transmission Internal Mode Switch (IMS) Schematic
Courtesy of GENERAL MOTORS CORP.