Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

Sign in to follow this  

4L80E holds 1st gear too long

Recommended Posts

I just bought a 2001 Suburban 2500 2WD with the 8.1L and the 4L80e.  She came from an impound auction and the PO had the steering column hotwired and busted.  She had the check engine light on with 4 codes for the transmission.  One of them was p1860 and I forget the rest.  When driving in D she starts off fine in first gear, but holds it to about 4k rpm or until you just lightly ease off the gas.  She also hesitates just slightly engaging into reverse.  So I read that a faulty ignition switch could trigger those trans codes, so I replaced the column and put a new ignition switch in.  The check engine light is gone, but she still does the same thing holding first.  All other gears are fine and she shifts through the other gears no problem, still hesitates engaging reverse though.  I changed the trans fluid and filter, still same exact thing.  

I just bought a transmission pressure tester and will check that.  If anyone has any suggestions on what to look for I would appreciate it. 


Share this post

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.