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  1. Vortec 5300 5.3L V8
    kidfrankiee95: IM HAVING THE SAME ISSUE WITH MY 2010 GMC SIERRA 5.3L TRUCK!! I still don’t know why it wont start. When i try to start its only a Single Click Sound. I try to turn the engine (crank) by hand it won’t turn either way. davester3500 replied: What did you do to the truck before...
  2. EcoTec 5.3L V8
    ive been doing a lot of research on an AFM delete and i keep getting more and more confused. some people say you need parts to do the delete, others say you dont. so my question is, do i need to get parts or can i just tune it out? is there any power difference in doing it as well? i also would...
  3. Vortec 5300 5.3L V8
    I just bought a 2007 Silverado with 5.3 engine. Flowmaster exhaust sound great when she starts up. This can't be 4 cylinders!! Wondering if my engine needs or has this AFM thing I've been reading about?? How can I tell if I need/have this issue? THX
  4. EcoTec 5.3L V8
    I recently purchased a 2014 5.3 sierra with AFM. I bought a range afm plug in delete and it keeps the truck out of v4 as it says it will. My question is are there anymore steps to avoiding the AFM issues? I read that the oil pump should be replaced with a lower pressure pump to reduce blow by...
  5. Vortec 5300 5.3L V8
    Hey guys I’m new here and hoping I can get some solid help from those that have gone before me. I have an 07 Sierra nbs 5.3 and I just had to do a rebuild for the dreaded lifter problem. I went with a full rebuild and head work along with TSP DOD delete kit and stage 2 low lift truck cam; all...
  6. Vortec 5300 5.3L V8
    My 2009 1500 just got diagnosed with a lifter failure on #7 and the estimates I have are discouraging. The engine currently has 175K on it, but the truck has no rust and I still owe another $5K on it. Here's what the shop told me. For replacing all the lifters it's $5,650. This would replace...
  7. EcoTec 5.3L V8
    After doing some research, I am inclined to go ahead with disabling the DFM system, as well as permanently switch off the auto stop/start, which I find to be a nuisance, Have any of you guys/girls done this? I would like to go about it in a way that will not void my warranty. Any input is...
  8. EcoTec 5.3L V8
    Have a 2015 5.3 lifter is broken on #4 cylinder probably because of afm. I do have a diablosport with Lew tunes and afm disabled. After seeing afm delete prices I'm considering just rebuilding the engine getting a full kit with bigger cam. My only concern is how big is too big before it won't...
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