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2007/2008 Silverado and Sierra Active Fuel Management Problems

106 messages,  Last post on Sep 01, 2009 at 9:04 PM

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What is this discussion about? GMC Sierra 1500, Chevrolet Silverado 1500, Fuel System, Truck

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#1 of 106 2007/2008 Sierra Active Fuel Management Problems by cadillac5 Oct 17, 2007 (4:08 pm)
There is a problem with the active fuel management systems on ALL 2007-2008 Sierras that have the 5.3L or 6.0. The 4.8L model does not have active fuel management. For the old timers out there, it is the same issue as the Cadillac V8-6-4 engine. Make no mistake, If your vehicle has active fuel management, you have a problem! GM is aware and do not have a fix for this issue. Replies to this message: 1offroader (Oct 17, 2007 5:56 pm) anythingbuttoy (Oct 19, 2007 2:44 pm) santaman58 (Nov 26, 2007 12:45 pm) natesms (Jan 18, 2008 9:28 am) 1offroader (Jan 20, 2008 4:03 pm) and 1 more... canw (Jan 21, 2008 8:28 am) and 12 more... tafid (Dec 20, 2007 4:17 pm) 1offroader (Dec 26, 2007 8:36 pm) tafid (Jan 01, 2008 9:03 am) and 3 more...
#2 of 106 Re: 2007/2008 Sierra Active Fuel Management Problems [cadillac5] by 1offroader Oct 17, 2007 (5:56 pm)
Replying to: cadillac5 (Oct 17, 2007 4:08 pm) What is the problem, exactly? You need to be a little more specific. I have 11,000 miles on my 6.0L Silverado and the only problem so far has been excellent fuel mileage and seamless operation.   It IS NOT the same system as the old 8-6-4 Cadillac. They are COMPLETELY DIFFERENT in design and operation.   Get your facts straight, then post when you have something more to say.   1offroader
#3 of 106 Re: 2007/2008 Sierra Active Fuel Management Problems [cadillac5] by anythingbuttoy Oct 19, 2007 (2:44 pm)
Replying to: cadillac5 (Oct 17, 2007 4:08 pm) I have a problem? Thanks!!! I'll rush right down to my dealer right away and tell them: "Hey, I have a problem with my AFM", he'll say: "What's the problem"? I'll say: "I have no idea, but some dude on Edmunds.com said everyone with AFM has a problem with their AFM".   Whew, glad I found this thread, cuz till now, my 6.0 has been running flawlessly.
#4 of 106 AFM by lionclawz Oct 19, 2007 (3:08 pm)
My 07 Has NO PROBLEMS. Which comes back to the accuser to provide viable proof instead of mindless jargon.   I cant help but think back to the writing style which is similar to one I haven't seen till now.   Time to get back to reading issues that are reality based from Chevy owners.
#5 of 106 LOL!! Troll.... by obyone Oct 19, 2007 (3:11 pm)
Attributing intent to trolls is a very difficult issue since by its very nature to call someone a troll is to already assume an intent, that they are posting only to cause problems. So once a person is called a troll they have already been categorized by the speaker as someone with a certain intention.
#6 of 106 AFM by teamimpact Nov 11, 2007 (12:23 pm)
My 2007 Vortec Max has only one problem It Runs Great and my wife thinks I love my truck more than her
#7 of 106 6.0 MPG by asylum575 Nov 19, 2007 (3:07 pm)
What kind of fuel economy do you get with a 6.0 with active fuel management Replies to this message: 12ozcurls (Nov 19, 2007 8:29 pm)
#8 of 106 Re: 6.0 MPG [asylum575] by 12ozcurls Nov 19, 2007 (8:29 pm)
Replying to: asylum575 (Nov 19, 2007 3:07 pm) yeah i second that..whats everyone gettin in terms of milage..
#9 of 106 Re: 2007/2008 Sierra Active Fuel Management Problems [cadillac5] by santaman58 Nov 26, 2007 (12:45 pm)
Replying to: cadillac5 (Oct 17, 2007 4:08 pm) Hey I'll stand right there with you and agree with there being a problem. My 2007 New Body Silverado 6.0 liter with max trailering has been running like crap since day one. Thought it would break in and the issues would go away...not! Its been to dealer and they told me it needs more time to have the fuel cells trimmed because it is a "smart" truck...I HAVE 3000 MILES NOW and it still runs like crap. It stutters and tugs going up hills and doesnt know when to shift. Plus it has a distinctive rough idle. It has a subtle noticeable pop when AFM kicks in and it sucks to drive it. It is going back to dealer again soon but they are saying that it might take 5000-7000 miles before the brain learns my driving habits. HEY!!!!!!!!!!!!!!! I shoudlnt have to wait for that long to have a truck run correctly! THERE ARE PROBLEMS OUT THERE WITH THESE TRUCKS CAUSE I HAVE ONE ONE OF THEM! If I drive in third gear and AFM doesnt kick in then the problem is gone...rough idle still exist though....so I say that the AFM is the culprit. GM needs to address this issue and notify dealers how to correct it. I will continue to take mine back til its fixed or lemon lawed! When you spend this kind of money you should receive a solid good running vehicle! 2 dealers are now telling me that there is nothing they can do! BULLCRAP! I have owned many chevys and this is the worst running one I have ever had! For those of you who are lucky to have a good running one, realize there are many of us out there that have bad ones! as the forums will show! Replies to this message: natesms (Jan 18, 2008 9:28 am) 1offroader (Jan 20, 2008 4:03 pm) natesms (Jan 21, 2008 6:33 am) canw (Jan 21, 2008 8:28 am) 1offroader (Jan 21, 2008 9:32 am) and 3 more... ponch1 (Jan 21, 2008 10:07 am) and 1 more... gmax6 (Apr 23, 2008 5:39 pm) and 5 more...
#10 of 106 fuel gauge and engine hot error by akflyer Dec 18, 2007 (8:47 pm)
Just purchased 2008 Z71 Siverado 1500 5.3L 3300 miles both sensor causing engine hot error and fuel sensor back ordered, problem seems to be wide spead and cold related accordin to local dealer in Anchorage

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