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#7141476 - 02/07/12 06:55 AM
AFM Failure on a new gm 5.3 at 12000 miles!
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Outdoorsman
Registered: 10/08/11
Posts: 180
Loc: Center tx
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Well I bought a new Gmc sierra z71 crew cab about 6 months ago. All was good up until about a month ago, I started noticing a light little tick at idle in the mornings and after driving a ways , letting it sit and then starting it back up. The noise has gradually got worse. The first trip to the dealer they said oh that's normal, second trip" oh that's carbon build up on the pistons". Now this 3rd time around they said "You have AFM system Failure" . Now they say they gotta tear down the engine, install new lifters,solenoids and It may need a new Afm control module. Leave it up to GM to ruin a great engine with some Crappy Active fuel management junk that only improves fuel economy by about 1 mpg. By the way my truck only has 12k miles on it and The dealership has done all the maintenance on it.I'm very dissapointed In My new sierra!!
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#7141499 - 02/07/12 07:10 AM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: Neverenuff]
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Extreme Angler
Registered: 11/02/08
Posts: 1195
Loc: Rockport, Texas
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That sucks. I have a 2010. Hopefully that is an isolated case!
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#7141524 - 02/07/12 07:21 AM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: Neverenuff]
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TFF Celebrity
Registered: 03/28/08
Posts: 6351
Loc: The Graves
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I'm very dissapointed In My new sierra!!
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call it what you will...he is not definitely not anywhere near the top of the list for QB's that I would choose needing a FG or touchdown drive late in the game.
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#7141559 - 02/07/12 07:34 AM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: Neverenuff]
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Extreme Angler
Registered: 11/02/08
Posts: 1195
Loc: Rockport, Texas
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The cab noise is crazy. It's like riding in my old jeep. I would not have bought the darn thing had it not been thousands cheaper than the Ford or Toyota, and it gets better gas mileage than the others as well.
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#7141619 - 02/07/12 07:56 AM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: Neverenuff]
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Outdoorsman
Registered: 07/09/04
Posts: 173
Loc: Texarkana
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I have an 09 GMC that in the shop for misfire on number 4 cyl.After plugs, wires and a coil now the heads are off bad exhaust valve.
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#7141648 - 02/07/12 08:05 AM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: Neverenuff]
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TFF Guru
Registered: 09/06/08
Posts: 25601
Loc: guthrie oklahoma
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hecho en mexico.
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www.aandmbaits.com Our republic cannot survive another four years of Obama. traffic is never bad, unless a cow is on the hwy.
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#7141751 - 02/07/12 08:29 AM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: Neverenuff]
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TFF Guru
Registered: 03/13/08
Posts: 14711
Loc: San Antonio
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my afm 5.3 in my 2007 z71 burnt more oil than i could keep track of. running synthetic and i was still adding a few quarts inbetween oil changes. then the engine started to fail and at 103k (warranty was up at 100k) i limped it on to a ford lot, traded it in and bought a new ford.
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Jeff
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#7141818 - 02/07/12 08:49 AM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: gary purdy]
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TFF Team Angler
Registered: 02/05/07
Posts: 4959
Loc: Bryan, Texas
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Yep I have 2010 Chevy crew that has a lot of cab and road noise. Buddy has a 2011 same truck, same Goodyear 20`s and his is much, much quieter. Whats different. Gov't made. Can't expect to have consistency
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#7141827 - 02/07/12 08:52 AM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: gary purdy]
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TFF Celebrity
Registered: 04/26/02
Posts: 8687
Loc: At the Terrell WalMartz
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Yep I have 2010 Chevy crew that has a lot of cab and road noise. Buddy has a 2011 same truck, same Goodyear 20`s and his is much, much quieter. Whats different. His truck was built before the lunch break, yours was built after the lunch break. 
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#7141834 - 02/07/12 08:54 AM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: roadtrip]
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TFF Team Angler
Registered: 02/05/07
Posts: 4959
Loc: Bryan, Texas
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Yep I have 2010 Chevy crew that has a lot of cab and road noise. Buddy has a 2011 same truck, same Goodyear 20`s and his is much, much quieter. Whats different. His truck was built before the lunch break, yours was built after the lunch break. As horrible as it sounds this could be exactly what happened lol
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#7142033 - 02/07/12 09:42 AM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: Neverenuff]
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TFF Team Angler
Registered: 01/03/06
Posts: 4873
Loc: Irving
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Least you get a rebuild. Now you even have a newer truck.
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#7142044 - 02/07/12 09:44 AM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: BassFever]
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Extreme Angler
Registered: 08/19/09
Posts: 2668
Loc: Justin,Texas
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Least you get a rebuild. Now you even have a newer truck. This makes no sense unless GM extends the warranty.
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#7142084 - 02/07/12 09:55 AM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: Neverenuff]
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TFF Celebrity
Registered: 05/30/02
Posts: 7587
Loc: Dallas, Texas, USA
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Well I bought a new Gmc sierra z71 crew cab about 6 months ago. All was good up until about a month ago, I started noticing a light little tick at idle in the mornings and after driving a ways , letting it sit and then starting it back up. The noise has gradually got worse. The first trip to the dealer they said oh that's normal, second trip" oh that's carbon build up on the pistons". Now this 3rd time around they said "You have AFM system Failure" . Now they say they gotta tear down the engine, install new lifters,solenoids and It may need a new Afm control module. Leave it up to GM to ruin a great engine with some Crappy Active fuel management junk that only improves fuel economy by about 1 mpg. By the way my truck only has 12k miles on it and The dealership has done all the maintenance on it.I'm very dissapointed In My new sierra!! Sorry to hear, I will spare you the Ford/Chevy jokes. It happens to all of them. This is one of my own reasons for going with the 5.0 in my 2011 Ford, I was leery of the new EcoBoost system. Maybe not justified, but I stayed away from it anyway. To make you feel good, I can tell you I just had the turn signal windshield washer switch arm replaced on my 9 month old new Ford. AND, we just had all of the camshaft phasers changed out on our 2007 Lincoln MKX with 37,000 miles.
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Bob 
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#7142658 - 02/07/12 12:18 PM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: Neverenuff]
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Extreme Angler
Registered: 04/20/10
Posts: 2208
Loc: Royse City
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Yeah, I'm as much of a Chevy guy as anyone, but the 2007 and newer Chevrolets all seem pretty bad. I've got a buddy up here at work who bought one and had an oil consumption problem (1 quart of oil consumed roughly every 1000 miles), and the Chevy dealer had him go through test after test after test and finally they agreed that it had a problem, but Chevy was unable to fix it and they were unwilling to give him a new engine. So instead of trying to fight Chevy, he just sold it to some guy without telling him about the oil problem and bought an old Toyota Eclipse that he paid $2500 for (less than 4 truck payments) and has been driving it ever since with 0 problems.
It's easy for me to criticize him for selling it without telling the guy about the oil problem, but he was insanely frustrated with the local dealer and tired of making huge payments on a truck that wouldn't even work right and the dealer wouldn't fix.
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Many men go fishing their entire lives without knowing it is not fish they are after. -Thoreau
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#7143126 - 02/07/12 02:15 PM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: Neverenuff]
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Extreme Angler
Registered: 11/02/07
Posts: 1245
Loc: KRUM, TEXAS
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I worked at a Chevrolet dealer for 14 yrs. I now drive a F150
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#7143158 - 02/07/12 02:28 PM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: J-SPENCER]
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TFF Guru
Registered: 07/02/04
Posts: 13537
Loc: NRH, TX
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I worked at a Chevrolet dealer for 14 yrs. I now drive a F150 That says it all right there!
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#7143171 - 02/07/12 02:33 PM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: buda13]
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TFF Team Angler
Registered: 02/05/07
Posts: 4959
Loc: Bryan, Texas
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I worked at a Chevrolet dealer for 14 yrs. I now drive a F150 That says it all right there! Yep my family owned a chevy dealership from 86-02 and my first truck i purchased myself in 05 was an f150. I firmly believe ford makes a better gas engine for a truck. Now if your wanting a pretty vehicle that isn't going to pull much and have to work. Then chevy/gmc all the way. Great looking trucks  but personally i will not own another chevrolet gas motor
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#7143200 - 02/07/12 02:44 PM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: Neverenuff]
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TFF Team Angler
Registered: 01/29/08
Posts: 3395
Loc: Flower Mound, Texas
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I had a ford and the transmission locked up after 6 months. Had it towed to the dealership where they said nothing was wrong, picked it up and drove it out of the parking lot, and it locked up in the middle of the highway......got the same ole song and dance again from the dealership. Only this time I insisted they keep it and drive it until it happened again, and it did with the Service Manager driving. I fought with that carppy compnay to fixe it EVENTHOUGH IT WAS UNDER WARRANTY!! They finally fixed it, I sold it and will never drive ford again. See how this works......we can go back and forth about car manufactures all day, and yes Toyota, Honda, Nissan, VW, BMW, Mercedes all have problems too. I LOVE MY CHEVY!!
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I play real sports, not try to be the best at exercising. - Kenny Powers.  
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#7143221 - 02/07/12 02:50 PM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: BassHook'em]
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TFF Guru
Registered: 06/12/03
Posts: 10487
Loc: Texas
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You are right, they all have problems. The determining factor for me is, when in doubt, go with the companies that did not take federal bailout money that they never intended to payback. It kind of thins the herd and makes for an easier choice.
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"Racing ... it's life. Everything that comes before or after is just waiting." -Michael Delaney (Steve McQueen in "LeMans")
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#7143227 - 02/07/12 02:52 PM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: Neverenuff]
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TFF Guru
Registered: 01/18/08
Posts: 34806
Loc: TEJAS
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yeah they all have problems but the ford and chebys seem to let a few more limons out on the road. that's a quality control issue
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Mark Levin Show.com "You sleep safe in your beds because rough men stand ready in the night to visit violence on those who would do you harm" George Orwell
GIVE RUSH HIS TEAM!!!
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#7143238 - 02/07/12 02:56 PM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: BassHook'em]
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TFF Celebrity
Registered: 07/17/10
Posts: 6286
Loc: Lubbock, TX
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VW, BMW, Mercedes all have problems too. 'Dese automobiles haff no problems, Discussion of LIES ess verboten, ja. Ze' ZF Dortmund transmizion needs no service. I always liked Fords better, but the Chevys do look good. I think if I were buying one right now though, i'd get an EcoBoost 4x4 Platinum edition.
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 I fish better with a lit cigar; some people fish better with talent. - Nick Lyons
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#7143283 - 02/07/12 03:09 PM
Re: AFM Failure on a new gm 5.3 at 12000 miles!
[Re: Neverenuff]
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TFF Team Angler
Registered: 07/22/09
Posts: 4755
Loc: Roanoke, TX
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The new RAMS do look pretty BA
_________________________
2 Chronicles 7:14 Then if my people who are called by my name will humble themselves and pray and seek my face and turn from their wicked ways, I will hear from heaven and will forgive their sins and restore their land.
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