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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 101 (Automatic Transmission - 8L90 (M5U) - Description And Operation) >> Description and Operation >> Manual Mode Description and Operation >> Manual Mode Shifting Operation

Manual Mode Shifting Operation

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
  1. With the engine running, place the shift lever in Manual (M) position. The letter M of PRNDM display will illuminate to indicate Manual Mode. A number will be illuminated next to the letter M to indicate the current gear selected.
  2. Momentary pressing the Transmission Manual Shift Switch - plus (+) will command the transmission to the next higher gear. The current number indicated on the PRNDM display will change to a number to indicate the gear that the vehicle operator has selected, and if conditions are appropriate, commands the Transmission Control Module to upshift to that gear.
  3. Momentary pressing the Transmission Manual Shift Switch - minus (-) will command the transmission to the next lower gear. The current number indicated on the PRNDM display will change to a number to indicate the gear that the vehicle operator has selected, and if conditions are appropriate, commands the Transmission Control Module to downshift to that gear.
  4. To exit Manual Mode, place the shift lever in Drive (D) position.
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