*EASY FIX!* SERVICE 4WD Chevy Silverado/GMC Sierra

IF THIS VIDEO HELPED YOU SMASH THAT SUBSCRIBE BUTTON! -- UPDATE 3/22/2024 -- 1,000,000 VIEWS! Thank you everyone for the support! — UPDATE 3/12/2018 — Holy crap guys, 36k views! I can’t thank you all enough for the amount of positive feedback on this video! I have a lot more car video ideas in mind to film once the snow melts. I would really appreciate if you guys would subscribe to the channel to stay updated! 😃 Hey guys, so my "SERVICE 4WD" light came on in my 2004 Chevy Silverado the other day and I started to research the issue. A bunch of people in the forums were saying that it was the transfer case motor, front actuator, the selector switch, etc. One guy mentioned that the ground to the frame under the drivers door was bad for him. So, I checked the ground and all looked good. Wire brushed it down and nothing changed. My 4wd would blink but not engage. It would engage into lower gear in 4lo but wouldn't actually go into 4wd. Taking a closer look at the wires, I noticed that there is a small ground wire that was hidden in the tube that got unconnected. Simply put a new connector on it and works like a charm now! I hope this helps you with your 4wd service light issue! This was a simply 5 minute fix!!!