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  • 2014 GMC Sierra 1500 SLE 5.3L Ecotec3 V8
    2014 GMC Sierra 1500 SLE 5.3L Ecotec3 V8 - 2014 GMC Sierra 1500 - Engine - 5/21/2015
    I would like to know what are the likely outcomes of the following scenario, I will go into as much detail as possible.
    Drove into a puddle, usually hard bottom, 3' deep max. Unknown cause changed the bottom into soft clay (frost came out?) and sunk until the water was up to the middle of the headlights. After an hour and a half of trenching and damming water, exhaust pipe surfaces, ...
     
    0 answer
  • 2014 GMC Sierra 1500 SLE 5.3L Ecotec3 V8
    2014 GMC Sierra 1500 SLE 5.3L Ecotec3 V8 - 2014 GMC Sierra 1500 - Engine - 5/21/2015
    I would like to know what are the likely outcomes of the following scenario, I will go into as much detail as possible.
    Drove into a puddle, usually hard bottom, 3' deep max. Unknown cause changed the bottom into soft clay (frost came out?) and sunk until the water was up to the middle of the headlights. After an hour and a half of trenching and damming water, exhaust pipe surfaces, ...
     
    0 answer
  • 2014 GMC Sierra 1500 SLE 5.3L Ecotec3 V8
    2014 GMC Sierra 1500 SLE 5.3L Ecotec3 V8 - 2014 GMC Sierra 1500 - Engine - 5/21/2015
    I would like to know what are the likely outcomes of the following scenario, I will go into as much detail as possible.
    Drove into a puddle, usually hard bottom, 3' deep max. Unknown cause changed the bottom into soft clay (frost came out?) and sunk until the water was up to the middle of the headlights. After an hour and a half of trenching and damming water, exhaust pipe surfaces, ...
     
    0 answer
  • jimeburns
    jimeburns - 1999 GMC Savana 3500 - Engine - 5/16/2015
    No spark from coil, new coil, 12v at coil and icm.
    I have no spark from coil. New coil, tested icm, replaced crank post. sensor, new fuel pump, new fuel pump relay, tried new wires, no blown fuses last I checked. Cranks, gets fuel, have 12v at coil and icm.
     
    • Michael Butler
      5/16/2015 Michael Butler
      On alot of Chevy, GMC, (gm products) the oil pressure switch won't let the car start if the oil pressure is low
      Michael Butler
      5/17/2015 jimeburns
      I will check the oil, there is no puddle under the van where I parked it last year though.
    • Michael Butler
      5/16/2015 Michael Butler
      How did you test for spark, and does the engine sound like it's trying to start????
      Michael Butler
      5/17/2015 jimeburns
      I held the end of the coil wire about a quarter inch from a known good ground
    • Michael Butler
      5/16/2015 Michael Butler
      Did you try to replace the rotor, if the coil has 12v but it doesn't fire the plug then the rotor would have to contact the distributor points to send power to the plugs as it spins
      Michael Butler
      5/17/2015 jimeburns
      I have no spark coming from the coil so I did not see any reason to check the cap. Thank you again for the suggestions
  • jimeburns
    jimeburns - 1999 GMC Savana 3500 - Engine - 5/16/2015
    No spark from coil, new coil, 12v at coil and icm.
    I have no spark from coil. New coil, tested icm, replaced crank post. sensor, new fuel pump, new fuel pump relay, tried new wires, no blown fuses last I checked. Cranks, gets fuel, have 12v at coil and icm. I used my test light on the signal lead on and it flashes ...
     
    0 answer
  • Hal
    Hal - 1980 GMC C3500 - Engine - 5/5/2015
    I actually have a 1966 chevy half ton with a 383 stroker engine with aluminum heads that overheated
    the engine overheated badly to the point where the valves were clamoring like it had cheap gas going up hill, I was on the freeway and made to a gas station. I realized there wasn't a drop of water in the radiator, I forgot about the aluminum heads and put water ...
     
    0 answer
  • Cplouie
    Cplouie - 2009 GMC Acadia - Engine - 5/4/2015
    How long should the cylinder ignition coils last
    I have had 4 of 6 fail in 75,000 miles. 3 in the last 11,000 miles. Is this normal. I have never had to replace one in any other car I have owned and 66% failure seans very high.
     
    0 answer
  • lvinson
    lvinson - 1998 GMC Safari - Engine - 4/24/2015
    My car won't start. When I turn the key it does nothing. Could it be the starter.
    I've checked the battery terminals, made sure that the battery had a full charge, tried jumping it, and nothing. It makes no noises or nothing. Could it be the starter or is it something else?
     
    • CVO
      4/24/2015 CVO
      Try this tip.

      First, check the battery and starter cables for their tightness or free of corrosion and physical damaged.

      See this Starting system simplified diagram. Have a help from an assistant to crank the engine, use a 12 volt light tester or a digital voltmeter, apply it to the starter control circuit.
      If there is light or 12 volts and the starter isn't cranking, then the starter is the culprit. Have the starter to bench test for free at the local auto parts stores.
      If there isn't no light or no volts, then the ignition switch is the culprit.
      Check the starter relay and position the Automatic transmission shifter in neutral.

      http://www.samarins.com/glossary/starter.html

      Note: a 3/4 charge battery is 12.50 volts
      A discharge battery is 11.75 volts.
      A battery under a cranking load and it is reading less than 7 volts,it will be a recycled battery.
  • John dawson
    John dawson - 2003 GMC Savana 3500 - Engine - 4/22/2015
    Where is the oil pump located on this vehicle?
    No oil pressure. Manual gauges installed and no pressure. Dash gauge no pressure. Oil warning lights on dash on. Vehicle in driveway.
     
  • Troy
    Troy - 2010 GMC Sierra 1500 - Engine - 4/22/2015
    I think my alternator went out!
    I was driving and out of nowhere my battery light came on and the display said to service vehicle charging system. I was able to get home but once I did I noticed my volts to my battery were dropping rapidly. I think it is the alternator due to it not staying ...
     
    • jdl
      4/22/2015 jdl
      I'd use a digital multimeter to verify. Everything off, place meter leads across battery posts, the generic spec for a full charge is around 12.6 volts. Start the vehicle, take second reading across battery posts, Second reading should be higher than the first if system is charging. You can also test at the alternator bat terminal.

      Could be issue with alternator wiring--alternator--battery. Some of the national brand auto stores will check battery and charging system. Battery cables ok?

      I haven't looked to see if any charging system trouble codes for this vehicle?
      jdl
      4/22/2015 jdl
      Just to add, my info was for non-hybrid.
  • Marcus
    Marcus - 1990 GMC C1500 - Engine - 4/15/2015
    Truck runs fine in park dies in gear
    Changed tps sensor and electrical Solinoid. Truck wount throw a code. Truck remains on as long as a little pressure is kept on the gas but if I let off the gas and come to a complete stop it dies and it always starts right back up.
     
    • GT500Knights
      4/15/2015 GT500Knights
      Sounds like it might be an issue with the torque converter clutch. Some vehicles have issues with the TCC getting stuck and staying locked into the engage position. A torque converter is supposed to fuckin as a fluid coupler. In park and drive while at a stop it should allow you to idle forward without stalling....this is a built in function of the torque converter. The clutch is built in to allow better gas savings and torque transfer at highway speeds...it typically will engage at above 40 mpg cruise. If this clutch is stuck engaged it will cause the car to die. Much like in a manual transmission if you let off the clutch at idle with no throttle the car will die.
  • jbuss31B
    jbuss31B - 2011 GMC Terrain - Engine - 4/14/2015
    Why wont my terrain turn over or start
    i turn the key on and everything turns on in the car and works fine but when i try to start it it does nothing. not even a click from the starter. the car only has 95k miles and is very well taken care of and has never had any problems except for a head and tail ...
     
    0 answer
  • Melissa
    Melissa - 1999 GMC Yukon - Engine - 4/12/2015
    Why won't my Yukon start?
    The problem began with the alternator. We bought a new one after having it tested and it was bad. We also bought a new battery because it was also badly drained due to the alternator draining it. We replaced both parts and now my Yukon will not start... When I put ...
     
    0 answer
  • Melissa
    Melissa - 1999 GMC Yukon - Engine - 4/12/2015
    Why won't my Yukon start?
    The problem began with the alternator. We bought a new one after having it tested and it was bad. We also bought a new battery because it was also badly drained due to the alternator draining it. We replaced both parts and now my Yukon will not start... When I put ...
     
    0 answer
  • mike1976
    mike1976 - 1999 GMC K3500 - Engine - 4/12/2015
    Truck sometimes has a very hard time starting.
    Truck has hard time starting sometimes. Truck will finally start after 20 minutes or more holding gas pedal to floor, compressing and decompressing. Fuel pump was replaced last year. It has this problem sometimes, when it doesn't do this it starts right up.
     
    • stan18
      4/12/2015 stan18
      Try turning the key on and off for 3 seconds a few times before attempting to start. The pressure may not be holding at the fuel pump causing there to be no fuel available for starting especially after sitting for some time. There is no need to press the pedal or hold it down. The fuel pump will add fuel each time you turn the switch on and off, without trying to start the engine. About three or four turns of the switch first, then try to start the engine. I have one that used to take three turns on and off and now takes four after sitting overnight. Hope this helps.