![]() ![]() What does ATC stand for in GM transfer case? Both trucks had one DTC stored: B2725 (active transfer case mode switch malfunction). Selecting “F1” on the menu got us where we needed to be. These two trucks have 19 possible DTCs, including those for input, motor, encoder and even VIN codes. On the 2000 GM truck, the complaint was no four-wheel drive, and the 4WD light in the IPC (instrument panel cluster) came on at times. Since both trucks have mode switch trouble codes, it seems logical to start there. Before we look at the other truck, it might be useful to see what GM’s ESI website (information says about B2725, to get a better understanding of the system’s design characteristics. 02-04-21-004 indicates a known problem with this switch assembly. Select OK from the confirmation message.Īfter all, General Motors TSB No.A progress indicator displays while the program loads. Wait for the “Press Up Arrow to run Snap-on System Restore” message to display, then Press the Up Arrow button.SOLUS PRO provides a depth of trouble codes, data parameters, bi-directional tests and legendary Fast-Track Troubleshooter repair strategies. The SOLUS PRO Scanner from Snap-on Diagnostics gives its users a competitive edge in the always evolving automotive repair industry. The button can be pressed for a few moments to reset the unit.The reset button is located on the opposite side of the main board from the CompactFlash card (Figure B, #1). ![]()
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