Question about 1995 GMC Suburban

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1995 GMC 2500 4x4 wont shift into 3rd or overdrive most of the times

The transmission is a 4L 80E and we have tried everything it normal wont shift out of 2nd gear

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  • Anonymous Mar 12, 2014

    put in new transmission and it still will not shift up out of 2nd gear

  • Anonymous Mar 16, 2014

    some times transmission wont shift gears stays on 3rd gear speedometer wont wor the shifter lights on dash and rpm needle wont work and the check engine light comes on,changed 2 solenoids and filter

  • Anonymous Mar 19, 2014

    will not shift

  • Anonymous Mar 24, 2014

    only has 120K also has intermittent problem with the dash cluster, could this be related? It is my sons auto and he is not able to pay a lot for repair

  • Anonymous Mar 26, 2014

    transmission gear not shifting

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I have the same truck and I had the same issue where one day I was heading to the dump and my truck wouldn't shift out of second gear. So I had to head home and I took the tranny cover off and checked it out and nothing looked bad but what I found out was there are 5 shift silinods and I changed 1&2,3&4 and it worked.so before you go replacing your tranny try those first.

Posted on Jul 26, 2015

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I have heard that the ignition switch can be faulty and not let the full voltage thru to the electricaly controlled 4l60e trans.i have the same problem with my 95 1/2 t. i rigged a switched wire from the fuse block via a relay to the proper wire on the trans....ask a trany tech and they will know what im talking about,,,good luck

Posted on Oct 30, 2008

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1 Answer

P0218 p0730 p0742


It's normal that won't shift into 3rd and overdrive because you have transmission code it's a default mode
P0730 Incorrect Gear Ratio
P0742 Torque Converter Clutch Circuit Stuck On
P0218 Transmission Over Temperature Condition
you need to solve those codes first

hope it helps

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