It's getting too close to duck season to have a broke 4wd...... Last December the "service 4wd" light came on with the truck being at about 198,000 miles. If you shut the key off and restarted, it would reset and go away. The 4wd still worked. It kept coming back and I did a little research on the issue via Youtube. I managed to get through the season and had plans to fix it in Feb/March. I finally swapped out the transfer case encoder motor and thought I was good... Nope, issue kept coming back... Took it to a guy with a Snap On code reader and he thought it was the encoder motor again.. So I replaced it again... Same issue, So I replaced the push button in the dash... Same issue, So I replaced the Transfer Case Control Module behind the dash.... I had another place(Autozone) read the code and it indicated a bad transfer case control module so I replaced that for the second time... Went ahead and swapped out the front axle accuator as I had nothing else to replace... I had also already cleaned the grounds on the frame just behind the left front wheel.... Issue went away....... Temporarily. I was on my third encoder motor by this time.. Getting ready for a Florida trip and I put the truck in 4low to get it up on four ramps to change the transmission fluid and filter and the transfer case fluid.... I roll off the ramps only to find the truck is now stuck in 4 low.... I had a guy come over to fool with it. He has a lot more experience then I do with 4wd issues... No luck. He recommends I take it to a mechanic in town who he likes. I do... He asks for a new encoder motor(#4) I bring it to him... He can't fix it; thinks the transfer case shift fork is bent... Recommends I have him replace the transfer case.. I ask if he can rebuild mine as I have taken pretty good care of it to include the fresh fluid.. He doesn't want to do that. I call around several places until one tells me that they will rebuild mine.... (This is July) I drive the truck(in 4 low ) to the new shop and park it and walk in the office to hand over the keys for the T Case Rebuild. The mechanic at the counter claims he has been there three years and never seen a T Case rebuilt.... Not being fond of lies, I walk out in search of a new mech shop... Parts store recommends a trans shop... I walk in and another guy claims he has a T case to fit my truck... Offers to sell it cheap... I drive truck to his shop... Turns out the T Case he has does not fit... He thinks it is an electrical issue and I agree..... I leave the truck with him for three weeks and it never gets touched.. I retrieve truck after three weeks, drive it to a buddies garage(in 4 low) and order a rebuilt t Case for $1100. I replace T Case myself but discover that the old case turns and shifts very smoothly.... Basically just like the newly rebuilt one... I put the new one in, hook everything up and push the button..... Nothing, it attempts to shift to 2wd after shifting to 4low... No dice, no change, same issue. Rebuilt T Case $1100 Transfer Case Encoder Motor $275 or so (Swapped 5 times from two parts shops) Total $550 Transfer Case Control Module $350(Swapped out twice) Pushbutton in dash $100. Front accuator $125 One mech paid for an honest attempt $100 A couple more quarts of Transfer Case Fluid $24 (Why go cheap even if the old fluid is fresh?) Finally(in August) drove truck 15 miles(in 4low) to a mech who has been good in the past. Called him in June but no answer or return call) He thinks it is a short but has not found an answer yet....He has only managed to get it to shift one time. Today I had to borrow a buddies truck/trailer to cut trees that I started on in April and to pull one boat to a welder and tow the other to my storage building to load the duck boat blinds.... Chevy.... Like a ROCK!