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08 GMC Yukon won't start

deptmgr57deptmgr57 Posts: 2
edited June 2014 in GMC

my 08 Yukon has 92000 miles, recently its been having a problem starting. its not the battery or alternator. I had it towed to dealer said it didnt code for anything, towed it to another dealer and the problem happened there, so the dealer said they believed it to be fuel pump. I got the quote, but asked them to check the anti theft module, because of this forum, i had seen several post about the anti-theft malfunction causing truck not to start. Advisor said didnt believe it to be problem. I drove it home. day later I'm stuck again. Left truck, came back to get it about 8 hours later, it started. Same thing happened the next day, finally it wouldnt start again. so I had it towed again. Dealer says after several days, its the fuel pump for sure. Had them do the fuel pump 900 bucks, went to pick up truck, wont start......Dealer said give them a few more days. please help if anyone has had this issue.


  • steverstever Posts: 52,462

    Any luck at the dealer's?

    Try skimming this discussion for ideas too:

    GMC Yukon Start Stall Idle Problems

  • raddad18raddad18 Posts: 2

    I am experiencing this exact same problem with my 2007 GMC Yukon XLT. My vehichle has 135,00 miles but has now left me stranded twice.

    The first time this happened I was 400 miles from home and had to stay overnight. When I put the key in the ignition, it turns but makes no sound. All the electronics in the car work perfectly fine (radio, windows, AC, etc.) but the engine will not turn over at all. I tried to jump-start the vehicle and had a tow truck come out and try to start it. Nothing. I towed the Yukon to a local (non-dealer because the closes one was 60+ miles away) repair shop that was closed at the time. When they called me the next morning I was informed the vehicle started right up and they couldn't identify a problem. Alternator, battery, etc. all tested fine. I drove it home and everything has functioned perfectly for several weeks. Last night I tried to start the vehicle and it is dead again. Exact same symptoms.

    Did you find a solution? Any suggestions?

  • deptmgr57deptmgr57 Posts: 2
    The dealer kept my vehicle for 10 days. Tried everything they could. Dropped fuel pump, put in a new one. Same problem. Finally he called me said, he got gm techs on the phone and they said that the fuel injection module went bad causing fuel pump to malfuction. He replaced the fuel injection module and the truck is running and starting just fine. 998 bucks total, plus 11 days without vehicle, although they gave me a free loaner. I've had my truck back for 3 weeks issue free. I hope this helps
  • steverstever Posts: 52,462

    @deptmgr57, ouch. :'(

    Sounds like they've fixed it "right" at least.

  • raddad18raddad18 Posts: 2

    "He replaced the fuel injection module and the truck is running and starting just fine. 998 bucks total". I am not mechanical at all. Would a faulty fuel injection module keep the engine from turning over at all? My vehicle makes no sound what so ever when I turn the key in the ignition. Also, once it fails, is there any reason why it would start working again the next day like there was nothing wrong? Just trying to make sure I don't spend $998 unless I absolutely have to. Thanks for your feedback - you give me hope there is a solution.

  • costycosty Posts: 1
    Hello,I've this 2004 gmc yucon and it won't start,Swich the ignition on and nothing happens no lights no gouges,nothing. Plus the starter won't turn. Been checking all fuses,the battery is brand-new. So can anybody help me please?

  • Iamdeltaapt41Iamdeltaapt41 Greenwood MSPosts: 1
    I got a 2010 GMC Yukon SLT and I’m having problems with it cranking sometimes. It will not crank sometimes but if I let it sit overnight the next morning it will crank up like nothings wrong. I’ve had the truck towed twice to the dealership and every time they tell they can’t figure the problem. I took it to the shop last week and they said it’s the fuel pump modulator and when I got it out the shop and it did the exact same thing. I took it back to the shop and now they saying the truck is starting fine. I’ve had this truck do this about 5 times since I’ve had it and I’m really trying to get this problem solved is there anyone out here who has had this problem. Can u give me some advice on what it is?

  • thecardoc3thecardoc3 Posts: 5,089
    Advice on what it is? No can't do that. It needs to be tested and have someone prove what it is. Anything else is just a guess. If you want guesses, I could guess that it is the starter itself, I could guess that it's a wiring issue, or a loss of communication between modules and quite a few other possiblities. All of which were correct on a different car at some time so like I said as far as just being able to tell you what is wrong, no I can't/won't do that.

    But what I can do is explain how to test and prove what it is. Do you have a voltmeter? Can you access schematics? What about a scan tool, or has anyone pulled codes and documented what they found for you?

    In the meantime, can you tell me if anything else doesn't work when the problem occurs? Things like the power windows, wipers, lights. It would really be helpful to have every module scanned for codes and document what modules responded and what codes they had in memory. Then when it happens attempt to communicate with all of the modules while it wont start and see if some of them are missing.

    If you have a regular shop one of the tricks that I would often do is have the customer ready to call me the moment the car acts up and as long as they were close enough I would go to the car and start testing before it got moved. When it is a random failure it takes patience and a good game plan to solve the problem.
  • Yankees8Yankees8 Posts: 1
    edited August 17
    So my 2007 Yukon only will start when it’s cold. I’ve replaced the battery, the battery cables, new starter, and new modules. Still same thing. The starter will click but won’t turn over. I can jump the battery and it’ll start right up or ii wake up drive to my shop across town turn the truck off and try to restart it will only have a little starter click no turn over. If let sit a bit it will start right up. Someone please help I’m going crazy lol
  • thecardoc3thecardoc3 Posts: 5,089
    What is the battery voltage when the condition is present without attempting to crank the engine?
    What is the battery voltage when the condition is present while attempting to crank the engine?
    What voltage do you measure from the battery positive post to the positive cable connection of the starter when the problem is occurring?
    What voltage do you measure from the battery negative post to the body of the starter when the problem is occurring?
    What voltage do you measure from the positive cable connection of the starter to the solenoid output terminal when attempting to start the engine while the problem is occurring?
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