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  1. TX_GMT425

    1999 Suburban 4x4, 4L60E, no shifting after sitting/jump start

    Last update - I used some contact cleaner and a small file and brush and now everything but the burned-out backlight bulb on the right half of the switch is working - I'm pretty happy with that. Going to check for metal debris in the trans pan and change the filter this weekend when I change...
  2. TX_GMT425

    1999 Suburban 4x4, 4L60E, no shifting after sitting/jump start

    Correct, the truck didn't move, but the output shaft was spinning inside the transmission even though the truck was stationary. So when you moved the shifter to Park, the output shaft was spinning as if the truck was moving (but with the T-case in Neutral, it wasn't moving), and that left the...
  3. TX_GMT425

    1999 Suburban 4x4, 4L60E, no shifting after sitting/jump start

    SUCCESS!!! I feel really stupid, but at least it's working and it didn't cost me any more money! It was in Neutral on the transfer case! I still have some diag to do (I think the switch is failing or has a bad connection) but after messing with the 4WD switch, the left side backlighting came...
  4. TX_GMT425

    1999 Suburban 4x4, 4L60E, no shifting after sitting/jump start

    Sorry - trying to type about something I'm weak on while I was on the phone with my doctor - having knee surgery next week so I've been moving slowly trying to diag this. What happens is when you start the truck in Park, you can shift out into all of the other gears and the PRNDL indicates...
  5. TX_GMT425

    1999 Suburban 4x4, 4L60E, no shifting after sitting/jump start

    Thanks guys I'll check those - I flat towed it with the engine running and my father in law said the speedo was working but I'll check the VSS - after the spike the speedo was pegged at 100mph but during the tow it dropped and started reading. I'll try the fuse and report back. After my...
  6. TX_GMT425

    1999 Suburban 4x4, 4L60E, no shifting after sitting/jump start

    Hi everybody, first time long time (forum lurker). I've been a member for years and have gotten lot of help from this forum, so I'm hoping you guys can help me out with a strange one. I'll try to keep it brief but include the full story. After being my daily for about seven years, I put the...

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