Question about 2002 GMC Yukon Denali

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I replaced starter and now it's turning but not firing. Checked all fuses. Replaced crank sensor. still not firing. What's next?

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Did you pull a coil an check for spark before replacing the crank sensor ? Does it have fuel pressure ? Are there any lights lit on the SECURITY ? No Start Diagnostic Basics EricTheCarGuy

Posted on May 20, 2015


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6ya staff

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Posted on Jan 02, 2017



  • 460 Answers

SOURCE: checked the ecm fuses and all the wiring for

im thinking the timing belt or chain went south..there is a way to check pull the spark plugs and have someone crank the motor while you use a compression test guage. buy 1 at a parts store their fairly inexpensive.. good luck.

Posted on Nov 09, 2009


Clint Smock

  • 4669 Answers

SOURCE: I have a 99 gmc seirra , we have replaced the

You need to hook a fuel pressure gauge to it. It has to have 55 psi or it won't run. Have you checked for spark at one of the plug wires. I'm guessing low fuel pressure, fuel pump.

Posted on Jul 22, 2010


  • 18 Answers

SOURCE: 2000 GMC Jimmy 4.3L CSEFI won't crank. Fuel

no low fuel pressure won't cause a no crank condition check for blown ignition fuse

Posted on Oct 06, 2010


  • 10 Answers

SOURCE: cant get no fire/replaced distributor

if i understand u correctly u replaced the distributor and cap if so i would start with making sure my pick up coil was installed correctlyand or replace it.i also would look at the possibility of it being a powertrain control module or neutral safety switch if this vehicle is equipt with one. hope ive been helpful

Posted on May 15, 2011

Chris Radabaugh

  • 131 Answers

SOURCE: 99 gmc jimmy wont crank..replaced

Try the light test.
1. Turn the lights on. The head lights should burn brightly.
2. Wiggle the battery cables and see if the brightness of the light changes.
If it does, then check the cables for looseness and tighten as needed.
If it doesn't, then go to step 3.
3. Turn the key to the start position and observe the lights.
Do they continue to burn brightly with no change.
Do they dim down considerably but, remain lit.
Do they go out completely.
If the lights do nothing and continue to burn brightly, then the problem is between the ignition switch and the starter. Check any fuse that has "IGN" in its description. If the fuses are OK, then you could have a bad ignition switch or a bad starter solenoid. Usually when a solenoid goes bad, you hear some kind of noise like a clicking sound. If you hear nothing at all, then check engine and body grounds before doing any thing else.
If the lights dim down but remain on, then the most likely cause is something mechanical like a bad starter or a blown head gasket. If you remove the starter yourself, then you can take it to a parts store and have it tested. There is usually no charge for this service . If the starter checks out OK, then remove the spark plugs and try to start the engine. (disable the ignition system by disconnecting power to the ignition module). If fluid comes out of one or more of the cylinders, then a blown head gasket is indicated.
If the lights go out completely, then the most likely cause is bad battery cables or bad starter solenoid if the battery is new. The cables can be checked with a set of jumper cables. The solenoid can be checked by placing a jumper lead between the large and small terminals of the solenoid and see if the starter works. If it does, then see if you can locate a fusible link in the wiring harness and repair as needed. If you need any additional information, then post a comment and I will get back to you as soon as I can. I hope this information is helpful and thank you for trying

Posted on Jul 01, 2011

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