Wondering if this thread is still active? I have 187k on my 2005 Suburban, I'd love to say it's going strong but I've got a code: P0894. Which is for Transmission Component Slipping. To me just driving around town the vehicle seems fine occasionally it will shift hard. I've tried clearing the code and running some Lucas Fluid in the tranny, but it didn't help as the code came back. I've been researching this and it seems that in theory it could be as simple as a 30 dollar solenoid or as expensive as a rebuild (more or less). Most of the people who replaced the solenoids, changed fluid and filter..etc ended up getting a rebuild as that did not fix the issue. Transmission shop wants $650.00 to change out $30.00 part. So I'm considering a local rebuild for $1650.00. Anyone else run into this problem or have any advise?