2000 z71 high idle !! driving me nuts !!
 

hey guys i need help! normally my truck idles at 700 rpm but it gets stuck idling at about 1200 rpm aproaching a stop light requires harder breaking as the truck feels like its pushing you ! if i turn truck off wait a few seconds and restart it will idle normal.it used to happen once a week now happens every day. i have been to my local chev dealer 4 times now with this problem first time they updated my computer $ 80... didnt work second time they cleaned throttle body $50.... didnt work third time they cleaned an air sensor $ freebie wow how generous..... didnt work fourth time they replaced air sensor $280.........didnt work ! im going back to chev on monday to raise hell but iam wondering if anyone else has had this problem or any suggestions thanxs mike.

RE: 2000 z71 high idle !! driving me nuts !!
 

I have an 00Z/71. I had a similar issue and it changed after I changed to a GMS MAF. I would also lend my direction to the throttle cable and seeing if there is anything putting any limitation on it. I know that you could have a MAF issue but do not buy a new one. I also would look towards your cam sensor, an easy replace. If you turn out to have a MAF problem, LMK here and I will sell you another from my 99C5-Z28/SS-00/Z71, they are all the same. They have no more than 100 miles on each and I will sell one to you as a member here for $50 with a refund if it doesn't help. They are shinning new and I take Papal, with over 2000 auctions on EBay since 1997. Free shipping to any Silverado member. Stop letting them take your money and get a SUN DiagNst on your truck. It could turn out to be an single O2 Sensor.
FIRST - do a search on Google using Boolean commands ->
2000 AND silverado AND tsb AND idle AND problems
GL
Greek

RE: 2000 z71 high idle !! driving me nuts !!
 

i had a pretty sticky throttlebody, seemed like i was cleaning it every three months untel i got the throttle body spaceron it. there was alot of carbon build up inside the intake, that might be some of your problem.

RE: 2000 z71 high idle !! driving me nuts !!
 

Check the idle air control motor. It's on the side of the throttle body. It opens and lets more air pass through the throttle body when the engine is cold ( fast idle ) then closes when it warms up. It might also be caused bya vacuum leak.