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- Chevrolet Silverado GMT800, GMT900, and K2XX 4WD General Information and Maintenace Schedule
Important information to help you understand your Silverado.
"service 4-wheel drive"
#21
CF Junior Member
Okay, I ended up taking it to the shop and letting them install a new encoder motor. That got it out of 4WD. It switches back and forth between 2wd and 4wd high, but I cannot get it to go into 4wd low. The shop says it is a problem with the transfer case, but as much as I paid to have the encoder motor replaced, I really want to make sure its the transfer case and not the encoder motor. Does anyone have any ideas on this? Thanks.
#22
Same thing happened to my 2005 Silverado 1500. The service 4WD warning came on in the dash and it wouldn't shift into anything but 2H. Read your thread, followed the instructions to turn ignition to the 'On' position, waited until all the lights stopped blinking and then started the engine as normal. BAM! Fixed the 4WD issue (as well as the remote keyless unlock) - weird. Until last Sunday. The Service 4WD warning came back on and I re-tried the aforementioned procedure with the ignition switch. No luck. Back to where I was before with a strange twist: now it stays in Auto 4WD and won't switch from that. I also cleaned and replaced the ground wires a while back and that fixed it for a while. Broke again.
Does anyone have a better answer than replacing the transfer case motor? I can't help but think this whole thing is electrical. Maybe I'll replace the Transfer Case Control Module next...
Does anyone have a better answer than replacing the transfer case motor? I can't help but think this whole thing is electrical. Maybe I'll replace the Transfer Case Control Module next...
#23
CF Junior Member
Same thing happened to my 2005 Silverado 1500. The service 4WD warning came on in the dash and it wouldn't shift into anything but 2H. Read your thread, followed the instructions to turn ignition to the 'On' position, waited until all the lights stopped blinking and then started the engine as normal. BAM! Fixed the 4WD issue (as well as the remote keyless unlock) - weird. Until last Sunday. The Service 4WD warning came back on and I re-tried the aforementioned procedure with the ignition switch. No luck. Back to where I was before with a strange twist: now it stays in Auto 4WD and won't switch from that. I also cleaned and replaced the ground wires a while back and that fixed it for a while. Broke again.
Does anyone have a better answer than replacing the transfer case motor? I can't help but think this whole thing is electrical. Maybe I'll replace the Transfer Case Control Module next...
Does anyone have a better answer than replacing the transfer case motor? I can't help but think this whole thing is electrical. Maybe I'll replace the Transfer Case Control Module next...
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MWR (June 12th, 2022)
#25
Update
Yes. Ordered the new shift motor through Amazon (cheapest place to get it) and installed it myself. Worked perfectly. I chose to leave the drive shaft in place, which was a mistake. Would have been infinitely easier to remove the shaft to have access to the upper bolt. Spent more time than necessary, but its DONE!