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1-17 of 17 Results
  1. General Discussion
    To make a long story short I changed my starter for a new one. The old one brackets broke off and the starte fell out cuz it was missing one bolt already and too much strain on just the other and snapped the bracket. Everything was working fine before that so I decided to just get a new starter...
  2. Maintenance
    I have an 2009 GMC Sierra extended cab long bed. It’s completely stock bought it recently at 197000 and it’s only at 199k. I bought it and the first week ran like a beast. It was quick compared to my old gasser. Then I started noticing lack of power and low mpg. Then the efr code popped up and...
  3. General Discussion
    Hello I’m in need of answers I have a 2008 LMM with a 5 stage trans and efi live when I put the tune into a higher mode and get on the gas the trans won’t shift until I let off but when I’m in the low stage and do the same it shifts perfectly Does anybody know what the problem could be
  4. General Discussion
    So ima try this again thought a shop found the problem but wasnt it. 08 lmm exhuast deleted, efilive tune, lift pump, after driving down the interstate for 10 minutes or so on a hot day when you exit off and come to a stop truck starts bucking and sounds like its knocking if you let it do its...
  5. Wheels & Tires
    Aftermarket fuel 17” wheel cracked on my 08 Lmm and I’m trying to figure out what to get to replace these wheels, thought about going to some newer stock wheels but the tires I have on my wheels now are fairly new. Any ideas? And also I haven’t even looked into it but would the bolt patterns...
  6. General Discussion
    I have an 08 LMM with 290k miles on it. Truck will not idle long without throwing P0087 low fuel rail pressure code and truck smoke’s at idle and on acceleration. Truck has had all new Injectors installed, new glow plugs, egr cooler, fuel lines from filter housing to CP3, new fuel filter...
  7. General Discussion
    Just got done replacing my fuel injectors in my 2009 GMC duramax, I haven't found much info on this job so I thought id start a thread if anyone needs tips. I can post basic steps upon request, but I wanted to recommend a few things that I learned as I went. Cleanliness is key, wash, blow air...
  8. 07.5-10 LMM Duramax Powertrain
    What to see if anyone can help. Transmission fluid is grey. Still has some red in it. I'm having problems with torque converter I can see and verified with scanner when it gets warm torque converter stops working. Doesn't lock up Also Temps seems hot. When towing I see 210/230 normally Is that...
  9. 911 Problems Forum
    Overheating while towing. Should say doesn't over heat with no weight. I could be wrong but seems like engine over heats then transmission with it. Full synthetic oil and transmission change 10k miles ago. Temps are 250 degrees Now how this started was by big o tire and mechanic shop. I brought...
  10. 2007.5 + (GMT 900) Non Powertrain New Body Style
    I’m selling my LB7 and buying an LMM I’m just curious if there is anything I should know about before I buy one! Also would a FASS 165 be okay with just a straight pipe, efi live, and intake for the time being? Later down when I’d be doing an egr delete, bigger turbo etc just my thoughts I’m not...
  11. 07.5-10 LMM Duramax Powertrain
    Long story short. Truck has gobs of power unloaded and during take off. But when towing once she shifts up and gets past 2k she runs out of gas. Like she's starving for fuel. I have pedal pegged to floor and only at 2k rpms. Also smells rich buy sounds like it's running lean hear pinging like...
  12. 911 Problems Forum
    I went out to start the truck today and no start no crank power locks no longer works remote start doesn’t work dash lights come on but security light stays on after all other go off and says service 4wd service trailer brake system service air bag just service everything both batteries are in...
  13. General Discussion
    So I’ve got efi live for my 09 lmm and I want to use it. It’s got a delete tune so I can rid my dpf. I’d like to complete delete my egr with a new up pipe and intake tube. My question is can I run with the egr unplugged until I can afford to get the egr delete stuff I mentioned prior and not...
  14. 2007.5 + (GMT 900) Non Powertrain New Body Style
    Like the post says I’m new to diesel pickups, got my CDL 2 years ago and started driving semis, got bitten by the bug and now I’m looking to get my first diesel for daily driving/light towing purposes, and a little fun now and then. I’ve been looking at a 2010 LMM Duramax w/ 164k miles, stock as...
  15. General Discussion
    New truck to me. Every 400 miles I go through the regen process but the white smoke is only visible when I'm stopped in traffic and seems to be coming from under the passenger floor area somewhere (presumably from the dpf). This only occurs when I'm in regen, other than that no smoke ever from...
  16. 07.5-10 LMM Duramax Powertrain
    A couple weeks ago I went to take off in my 2009 lmm and realized I had no forward gears and it shifted very hard into reverse so I thought it was a tcm sure enough after getting a new one it shifts smoothly into reverse and backs up fine but still has no forward gears when I put it into drive...
  17. Aftermarket Mods.
    So I’m new to the diesel mechanics I’m no Mechanic myself but as far as bolt up parts go I’m pretty confident I don’t want a race truck just Some more power and for it to souls good I have a stock 09 lmm that just hit 100k truck is very sound and well maintained when it comes to power with our...
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