2003 GMC YUKON DENALI XL HAS NEW BATTERY, ALTERNATOR, AND STARTER. EVERYTHING LIGHTS UP BRIGHT IN VEHICLE, BUT IT DOESN'T MAKE NO CRANKING SOUND WHEN TURNINGTHE IGNITION SWITCH ON
What Else Could It Be?
Battery cables/connections all good?Note the starter motor diagram. I see three fuses, also, the neutral switch. Use a test light and check voltage at fuses, one fuse is hot all the time. The crank fuse goes hot with key in the crank position. The other fuse goes hot with key on. Two voltage circuits at starter motor, one comes from battery hot all the time. The other circuit goes hot when starter relay is energized. Starter motor should ground through engine block. Can you unplug starter relay and do some testing at the relay? Any testing, make sure transmission is in park or neutral and parking brake is set. Vehicle can't move.
