Question about 2001 GMC Yukon XL
Ok so the other day I am driving and the vehicle stalled. I managed to get it home and started investigating. I have narrowed it down to either a fuel pump or fuel pump wiring. Yesterday I checked the fuel pressure and it was 55 psi prime and 50 psi running both were stable. Gm dealer I called said that is normal. This morning there is no start and no fuel pump activation. My question is is it normal to have normal fuel pressures from a pump that needs to be replaced? I have not checked the wiring to the tank yet but will do so later. Any info or help is very much appreciated. Thanks.
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Posted on Jan 02, 2017
SOURCE: 1999 Yukon cold start problems.
1999 Yukon Start Issue - I have replaced the octopuse, battery, fuel filter, fuel pump, still having problems starting in cold weather, sometimes after a heavy rain.
Posted on Dec 08, 2008
you may have two oxugen sensors on your yukon. if so the oxygen sensor that controls that bank may be bad. from what you mentioned in your complaint, it sounds like it is the oxygen sensor.
Posted on Dec 24, 2008
I see that you had the injectors replaced 20,000 miles ago. I would still check the oil to make sure it is not overfull. The new injectors could be bad. If the oil level is not overfull then get a paper towel and touch the dip stick tip on the paper towel while oil is on the dip stick. If it's only oil it will not spread. If it has diesel in the oil the oil with spread. If this test doesn't show the injectors to be bad then you have three other possibilities. The FICM (fuel injection control module), the fuel pressure regulator, or the injection pump. It's hard to pinpoint what the problem is without running more tests and the only way to run those tests is with the computer the dealership has. Just so you know your injectors are still under warranty until 100,000 miles. Most likely you will have to take it to the dealership to get you truck fixed. I hope this helps you some.
Posted on Jan 05, 2009
had this problem on my neighbors 98 chevy truck with the same engine !!
it turnd out too be the fuel pressure regulator,you have too pull the upper intake too replace it!!
Posted on Jun 06, 2009
SOURCE: 1997 GMC Yukon won't start.
WHEN YOU REPLACED THE FP DID YOU OR THE DEALIERSHIP REPLACE THE FUEL FILTER MAYBE YOUR PROBLEM ....
Posted on Dec 09, 2009
Testimonial: "They did replace the filter but thank you very much for the tip."
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