Certain vehicles have a condition where the transmission control module (TCM) could drain the battery if the battery has previously been disconnected/reconnected.
This bulletin applies to 2021 Buick Envision vehicles. Certain vehicles have a condition where the transmission control module (TCM) could drain the battery if the battery has previously been disconnected/reconnected. The correction requires programming the TCM.
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety ofspecialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.
