Had truck scaned will not engage code came up ( not sure on code number think it was 323 or 363 not sure). Replaced encoder motor,4wd control module,tranfer case, dash switch, tested wiring harrness,actuator motor,all in working order. What have I over looked?
2000 GMC truck service 4wd light on, stuck in four wheel drive. on 2000 GMC Sierra 1500
by dgpoitras in Ellington, CT on November 12, 2011
ANSWER by mastertech6371 , November 12, 2011
my guess is the acuator which is a very common failure. there is a updated one available from gm. Roy