Question about GMC Sierra 2500HD

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1996 gmc sierra diesel pick up hard start in the morning

Won't start on a morning

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 15 Answers

SOURCE: 1996 GMC Sierra 1500 XC 4x4 5.7 Hard To Start

It is probably the fuel pump. If I remember the number correctly, this fuel system needs about 50 lbs to open a valve.
Until this valve opens, no fuel gets to the fuel nozzels.

Posted on Apr 30, 2010

  • 89 Answers

SOURCE: 1989 gmc sierra 6.2 liter diesel hard start when hot

hi, i have seen this problem ten years ago twice, but i was dumbfounded by the answer. all details aside, I replaced the ecm, and never had the problem again with both of them. this repair was a recommended repair by the local truck depot in my town, they stated the ecm got hot along with the truck and it lost the injector sensor signal. now, don't take this solution and run with it, i haven't repaired a 6.2 diesel in ten years and i maybe off track completely. but at least maybe you could ask around your town or maybe a large truck facility about this. of course, you should take to a shop to have diagnosed. hope i could help.

Posted on Jun 07, 2010

  • 202 Answers

SOURCE: I have a 1996 GMC Sierra C1500. I'm totaly new to

A bad fuel pump will not keep the engine from turning over. I would first test your battery and make sure your connections are clean. If that check out I would check your starter and starter relay.

Posted on May 12, 2011

  • 447 Answers

SOURCE: 1999 gmc sierra 2500 6 liter ran out of gas now won't start

If you are at or near the 100,000 mile mark then your fuel pump may have failed. If you remove the fuel filler cap and listen carefully at the filler neck while someone turns the ignition key to "run" [don't actually crank the engine] you should be able to hear the fuel pump buzz for about a second and a half as the key is turned On. If you don't hear the pump buzz then odds are your pump is dead. Your pump may have actually failed making it appear as though you ran out of fuel. Not to uncommon. Hope this helps and good luck!

Posted on Nov 03, 2011

tayjoejoe
  • 2182 Answers

SOURCE: my security light stays on & won't let my 99 gmc 6.5 diesel sierra start any solutions

Yes, the system is called Passlock, and malfunctions regularly. Go to this link for an explanation of how it works, plus some tricks and tips on how to reset it, or bypass it.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

Posted on Mar 27, 2012

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Ran out of diesel now vehicle won't start


This is not unusual on a diesel. What happens is there is air in the system. If this vehicle has an electric fuel pump loosen line where fuel enters injection pump then turn ignition key to the on position and watch for fuel to appear and then quickly tighten line before turning off key. Then try to start. If does not have electric fuel pump will need a second person. One will loosen line and watch while other cranks vehicle until you get fuel and tighten line before the other person releases ignition switch unless vehicle starts first. If that doesn't do the job do this where line hooks onto each injector. Probably will not have to do this to all injectors but could run rough until all the air gets out of everything. I have farmed with diesel tractor for 25 years and dad I drove the gm vehicles with the 5.7. You normally don't start a diesel without bleeding the air out of the lines although some will self bleed most won't. Hope this does the trick.

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My security light stays on & won't let my 99 gmc 6.5 diesel sierra start any solutions


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1 Answer

I have a 1996 GMC Sierra C1500. I'm totaly new to


A bad fuel pump will not keep the engine from turning over. I would first test your battery and make sure your connections are clean. If that check out I would check your starter and starter relay.

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1 Answer

1996 gmc runs full throttle when started


Check your throttle linkage at the throttle body if it is a gas engine see if it is stuck wide open. if it is a diesel check cable at injection pump.

Feb 05, 2011 | 1996 GMC Sierra

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