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GMC Master
3,854 Answers
- Posted on Nov 19, 2009
Re: 4L 60E - 2001 k1500 will not shift into 3-4. Oil is...
- No 3rd or 4th gear: “3-4” clutches are worn out. R&R. The car is safe to drive (in 2) until you can get it fixed.
- Trans shifts into gear harshly, car feels sluggish off the line, No
1st, 4th or TCC lockup available, Manual 2nd, 3rd and Reverse are only
available gears, CEL is on: Transmission is either in limp-home mode or
has lost electrical power. If there are lots of error codes in the PCM,
check the under hood fuse that powers the transmission, and if it pops
again, look for a short in that circuit like an O2 sensor harness
touching exhaust. Otherwise, check PCM codes for a particular fault in
the transmission causing the PCM to put it in limp-home mode.
- No 1st or 4th available; trans shifts 2nd to 3rd by itself in D or OD
and locks the converter : Shift A solenoid failed. Easy fix in the pan.
Or a wiring problem from PCM to trans.. or PCM.
Check to see if your transmission is in the limp mode, which would only give you 2nd, 3rd and reverse gears. No 1st or 4th gear.
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