I switched fro 2 hi to 4 hi and the service four wheel drive system light came on , I switched it back to 2 hi but the indicator light stayed on 4 hi?
SOURCE: service 4 wheel drive on info center
2005 z71 Silverado v-8 4X4 not working.
Case History 07 09 13
Problem started with service 4wDrive
message. It would come and go. Got worse as time went on. Then it
got to All switch lights would only come on 3 seconds when key turned
on and again when started for 3 seconds. Then no 4X4 and no lights.
Researched on internet and noted problem was often solver by
replacing control switch due to bad solder joints. Ordered new
switch. Changed out with no change. Replaced old switch.
Went to AutoZone and checked
codes. Had 4 codes B2725, B0790 (both Cleared) and Codes C0327 &
C0040 (Both would not clear)
Next I decided before taking to
the shop to try cleaning the contacts although I thought I was
probably wasting my time. Went to radio shack and bought electronic
contact cleaner spray.($9.98). Pulled 30 amp fuse under hood and
raised vehicle. Disconnected plug on transfer case and sprayed
contacts on both plugs(male & female). Thoroughly dried with
compressed air and plugged back in. Just knew this wasn't going to
fix it. Also sprayed both plugs on both sides of transfer case(Rear)
(2 speed sensors I think). Anyway to make a long story short started
up truck and all was normal:o) Every thing work fine and all lights
and all modes work correctly. Hope you have this easy of fix to cure
your 4X4 problem. [email protected]
SOURCE: i have a 1999 gmc
If you have front end problems like an pitman arm or idle arm needs to be replaced, it may not got into 4 wheel drive. Go to the nearest muffler shop or mechanic to have them lift up your truck to see if something needs to be replaced.
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