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Hummer engine repair questions and answers

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  • sergioa57
    sergioa57 - 2004 Hummer H2 - Engine - 4/1/2014
    Display says battery not charging
    Changed battery(new one) & replaced alternator and still!
     
    0 answer
  • thelastindian
    thelastindian - 2006 Hummer H3 - Engine - 10/15/2013
    Stall's warm or cold, can be restarted, but must wait a min. or so to try.
    no CK engine codes
     
    0 answer
  • thelastindian
    thelastindian - 2006 Hummer H3 - Engine - 10/15/2013
    Stall's warm or cold, can be restarted, but must wait a min. or so to try.
    no CK engine codes
     
    0 answer
  • weco100
    weco100 - 2007 Hummer H3 - Engine - 9/16/2013
    Engine periodically cranks but won't start. Maybe 15 minutes later stats fine. Happens once or twice a week.
    Seems to be worse when it sits overnight.
     
    • spyder369king
      9/16/2013 spyder369king
      having same issue with my H3, I had a leak in my sunroof...the sunroof drains were clogged, causing my carpets to be saoked, evidentally the water ran into the electrical causing something to short out ( thats what the mechanic says anyways....) but my car starts in 11 to 13 minutes everytime....makes no sense...something else must be wrong
  • jenjen74960
    jenjen74960 - 2009 Hummer H3T - Engine - 9/11/2013
    What would cause the AC to freeze up?
    air has been blowing colder than normal even with the AC off.
     
    • wbrockstar
      9/11/2013 wbrockstar
      Running the ac on max ac versus runnin it on panel ac,will cause it to freeze up but only when youve got the fan speed on the 1st or 2nd level.I.E.dont push the button on max ac and then keep the fan on low,or else it freezes up.A faulty dryer can allow excess moisture to build up,causing it to freeze up.Make sure the ac condensor ( the part that resembles a radiator and mounts in front of it ) is free and clear of all debris.Remove it and clean with compressed air or light water pressure from hose pipe nozzle,if it is caked up with leaves,dirt,bugs,etc.Its job is to convert the freon which leaves the compressor in a high pressure vapor state into a warm high pressure liquid state before next bein sent to the evaporator core,in housing under your dash.If condensor is dirty and not allowing airflow to pass through it,the freon might not be converting from vapor to liquid state,causing improper system function.The clutch cycling pressure switch,mounted on dryer,controls evaporator core pressure to prevent evaporator icing and blocked air flow.I would check this first since its the easiest part to gain access to.Good luck
    • John's Auto Repair
      9/11/2013 John's Auto Repair
      Sounds like the compressor is not cycling off when the low side pressure gets below
      a certain amount. I believe your system uses a pressure cycling switch.
  • Gerry
    Gerry - 2007 Hummer H3 - Engine - 9/10/2013
    Where do I find the fuel line vent sensor on my hummer h-3
    I have a fuel line sensor vent code coming up. Chipmunks got into the air breather compartment . They built a nest in the air breather box and covered the air filter. I fixed that then a vent line sensor comes up as well. I found a small rubber wire cover or sensor ...
     
    • bear.1216
      9/10/2013 bear.1216
      Check the vacuum diagram under the hood and trace all the hoses that attach to the EVAP vapor canister. The sensor is either attached to vapor canister or fuel tank. Check all evaporative emmisions hoses for leaks. Also check gas cap and canister purge solenoid. What is the actual code you are getting.
  • EDWINCASTILLO713
    EDWINCASTILLO713 - 2006 Hummer H3 - Engine - 6/27/2013
    AM GETTING MY COILS WET WT ANTYFREZE
     
    0 answer
  • sergioa57
    sergioa57 - 2004 Hummer H2 - Engine - 4/30/2013
    Cranks but doesn't turn over!
    Same problem once before, problem was ignition coil. Replaced one fixed problem. but now same symptoms, so checked all coils and couldn't find bad one.
     
    0 answer
  • bearcats3
    bearcats3 - 2007 Hummer H3 - Engine - 3/25/2013
    Where is the starter located
     
    0 answer
  • acres14
    acres14 - 2006 Hummer H3 - Engine - 3/23/2013
    How to replace pcv system
     
    • Jimm
      3/23/2013 Jimm
      The PCV (positive crankcase ventilation) system consists of; the PCV valve, the valve seal, the valve connect hose and tubing, the PCV filter. You can simply replace each or all these items, depending on the condition.
      Here are several possible on-line auto parts sources; www.autopartswarehouse.com, www.1aauto.com, www.rockauto.com.
  • claudio
    claudio - 2006 Hummer H3 - Engine - 1/22/2013
    Have a Honda civic ex 04 not getting any heat blowing cold air what can I check for
    no heat just cold air
     
    0 answer
  • taylor
    taylor - 2006 Hummer H2 - Engine - 12/23/2012
    I turn on my car and the engine won't start. The lights and radio turns on and the whine light is on, what's the issue?
    I just put in a subwoofer and the guys at the shop had to jump the car, before that, the car has never needed to be jumped. That was just 6 days ago.
     
    • ENGINEBUILDER
      12/23/2012 ENGINEBUILDER
      Possable constant power draw from new sub wolfer system, Have load check done on battery. Some of these systems draw alot of power and this could be draining battery. I have seen people install a redundant battery to boost avalable CCA .(cold cranking amps). Disconecect fuses from sub system to verifiy after jump starting.
  • 1detroit1
    1detroit1 - 2007 Hummer H3 - Engine - 11/20/2012
    RPM falls to 3-4 hundreds when braking.
    When I apply the brakes to slow down or stop my Tach shows the RPM's go down to below 500 and it feels like it wants to stall. The other day it did stall out while braking to enter a parking lot. Anyone have any idea's what the problem could be? I've had a BG fuel ...
     
    0 answer
  • corey adams
    corey adams - 2007 Hummer H3 - Engine - 9/16/2012
    The car will shut off while driving starts no problem . And restarts no problems
    What could be going on
     
    • HouseCallAuto
      9/16/2012 HouseCallAuto
      Plug in a code reader and see if any fault codes are stored. if no codes are there, tell us that. The check engine light does not have to ne illuminated to have stored codes.
  • zephyrzoeeric
    zephyrzoeeric - 2006 Hummer H3 - Engine - 9/12/2012
    Does start right away
    I turn on the key and the delays before running
     
    0 answer
 
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