Question about Chevrolet Tahoe

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Replacing transfer case actuator and need to know how to get the transfer case to neutral manually because the old actuator has been taken off already or how to get the motor assembly to match with the transfer case.

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  • INXbabe May 22, 2011

    Once the installation is complete how do we get it back in 2 wd? Got it lowered and started but the light is just flashing and won't go into 2 wd.



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There are few procedures, which will help you to shift the transfer case to neutral manually. Click the link below and go through the instructions:--- --------- This should help.Thanks.Helpmech.

Posted on May 22, 2011

  • raj somaiya May 22, 2011

    sometimes you will have to try to push buttons few times to get it shifted.
    Try 5-10 times button push from 4H to 4L to 4A to 2W till it finally shifted out of neutral. But if its not getting to 2wd then can be possible that motor not fitted exactly.The gear is getting stuck somewhere.
    put the transmission in neutral and listen for the Transfer case encoder motor to work when you push the button on the dash for 4wd hi then to 2wd. If you do not hear it working, inspect the wire harness at the encoder motor to make sure its not damaged while fitting.
    If the light keeps flashing after this then disconnect the battery for 30 minutes for a TCCM reset, just make sure you turn off your radio first.
    Still not working, if possible that need to replace the Transfer Case Control Module (TCCM) (Part Number: 12577412 ).---------
    this should help.thanks.Helpmech.



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Transfcase motor not shifting

Have you had it check for DTC's - diagnostic trouble codes . frustrating because you don't know what your doing. Rookies ! I'd tell you have to test but you don't have tool or knowledge .
What transfer case does your tahoe have ?
Do you know what DTC'S are ? Your vehicle 4X4 can set a bunch .

DTC B0770
DTC B0775
DTC B0780
DTC B0785
DTC B0790
DTC B2725
DTC C0300
DTC C0305
DTC C0306
DTC C0321
DTC C0326
DTC C0327
DTC C0359
DTC C0374
DTC C0378
DTC C0379
DTC C0550
DTC C0558

DTC B0775 Four Wheel Drive High Range (4HI) Indicator Circuit Malfunction

DTC B0780 Four Wheel Drive Low Range (4LO) Indicator Circuit Malfunction
DTC B0785 Two Wheel Drive High Range (2HI) Indicator Circuit Malfunction
DTC B0790 Transfer Case Neutral Indicator Circuit Malfunction

DTC B2725 ATC Mode Switch Circuit Malfunction

DTC C0300 Rear Speed Sensor Malfunction
DTC C0305 Front Speed Sensor Malfunction
Just show a few DTC'S and for everyone of these DTC'S is a diagnostic flow chart . Do you know what that is ? It's fustrating and hard to fix something when you don't have a clue as to what your doing . Do you know how to do basic automotive electrical testing ?

This would sound about what the problem could be , but with out testing id be guessing just like you .

DTC C0306 05: Motor A or B Circuit Short to Battery or Open
DTC C0306 02: Motor A or B Circuit Short to Ground
DTC C0321 01: Transfer Case Lock Short to Battery
DTC C0321 06: Transfer Case Lock Short to Ground or Open

Do yourself a favor and save some aggravation an take it to a qualified repair shop . You do know a computer controls the 4X4 system ? transfer case shift control module .

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