2003 denali wont start
Asked by Denali2003 Sep 28, 2016 at 01:47 AM about the 2003 GMC Yukon Denali AWD
Question type: Maintenance & Repair
I have a 2003 yukon denali that wont start and
when you turn the key to turn it on you can hear a
click on the passengers side and the starter was
tested good.
4 Answers
Not starting or not doing anything when u try to start it. If nothing, check battery cables for corrosion and to make sure they are tight
Similar happen to my Yukon and it was a defective fuel pump Relay $8 and Guala ready for work. Located nex to the engine in driver upper side. Good lock .
Check your ground wire to the pcm located on the valve cover post, rear of engine, passenger side. It will break off or be corroded real bad. Disconnect it from that point, i just ripped mine off, and crimp an extension wire to it,,and reground it to the firewall where the engine ground strap is. This fixed my electrical problems on my 2003 yukon. Theres also 2 ground wires located under driver side door, under side chassis, behind running boards, check those for corrosion too. Also, one more ground wire, front bumper drivers side, behind bumper on chassis there are 2 ground wires located there, i removed them,,and reground them to groundpoint inside engine bay with other ground wire from pcm. This WILL fix your problems, and while you are at it, upgrade your factory ground wires for altenator and battery becsuse they are crap.
