Question about 2002 GMC Yukon Denali
Posted by Anonymous on
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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Posted on Jan 02, 2017
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
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
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
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 Fixya.com.
Posted on Jul 01, 2011
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