mablutman

New guy here,

just bougt a 05 silverado Z71 crew cab with 36K on it a month ago. Now, when coming to a stop, the tranny downshifts then seems to upshift and back down. the engines revs up to 1000RPM and then back to 800 and back to 1000 then back down. its pretty weird. any ideas

Also, 4wd service light came on tonight. ive only used the 4wd once to pull a very small tree stump out, Any common problems or simple solutions? cant change to 4wd anymore, switches dont work. I did justdrive through a large puddle (flooded street).
thanks in advance....

mablutman

ok, transmission is ok, i took it over to my friends shop and they checked it all out.

4wd is still not working. he couldnt pull any codes. it actually worked one time and he thought it was just a glitch, but the service 4wd came back on and now its pretty much never gone away. i did notice tonight while driving the red light next to the N (eutral) writing is now on and the light on the 2wd is off.... It has to be something electrical, relay, computer?

thanks