Question about 2007 GMC Yukon Denali
When you turn the key to the run position, you should be able to hear
the fuel pump cycle. Fuel pressure should be 60-66 psi with the key on engine off, or about
56 psi at idle.
You need to get the codes read with a code reader. Any garage has these, they will charge you a diagnostic free (autozone) or you can buy your own for $80 at any auto parts shop. It could be one of many things, you need to know what the codes are.
Sounds like the truck needs some attention. Maybe cap, rotor, wires, air filter, fuel filter, plugs. Keep in mind that making noise does not meen the pump is pumping. Those are very picky about presure, less than 55 lbs and they wont run.
You did say it is pumping so it also could be electrical but I would check the pump presure first. When is the last time the fuel filter was changed. These will also cause a no start if they restrict the flow enough.
Ended up being a Crankshaft Position Sensor. Not saying that's it, but if its easy to get to maybe check it with a resistance tester, if it falls apart inside the coil could still be ok but re-positioned so it doesnt work. I got burnt by this once and it wont happen again. If it reads open however you can be fairly sure it is bad. Sometimes in the long run it is cheaper to find a good mechanic with a scope to see what signal is missing and let them fix it.
The Vortec 350's are excellent engines. Intake gaskets, injection system and fuel pumps are problematic in these trucks.
Posted on May 27, 2010
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get to try the service completely Free afterwhich it costs $6 per call and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Feb 11, 2017 | 2002 GMC Yukon
Sep 27, 2012 | 2000 GMC Yukon Denali
Jul 29, 2012 | GMC Yukon Cars & Trucks
Jan 28, 2012 | 2001 GMC Yukon XL
Sep 22, 2011 | 1996 GMC Yukon
Mar 04, 2011 | 1997 GMC Yukon
May 09, 2010 | 2001 GMC Yukon XL
Jan 15, 2010 | 2001 GMC Yukon XL
Nov 30, 2009 | 1999 GMC Yukon
52 people viewed this question
Usually answered in minutes!