Make sure that the starter solenoid is being activated and getting power to the starter. All battery connections and starter motor connection must be squeaky clean since any resistance in a 12 volt system may have a serious impact on power flow to device. Ignore the radio, heater etc during startup - the car is designed to turn them off when you turn the key to start so all power goes to the starter motor only.
SOURCE: Timing 97 yukon
distributor has to be installed correctly and then timing set with scan tool
SOURCE: 2006 yukon wont start. Replaced battery and
check the lead wire to s terminal on the starter, it should have voltage with the key on start
SOURCE: 97 GMC yukon 5.7 vortex
There is a fuel rail on top of motor it runs form 1 injector to another.at the middel or end of the fuel rail there is a fuel pressure test valve. it looks just like a air tire valve.with a black cap too. remove cap and hook up a fuel pressure tester. most big part stores will let you use one for a deposit.you'll get back when you return tool or you can buy one 20.00 about.after you hook it up you should have 35 to 47 psi with key on.if no psi or low psi 20 or lower pump is bad.also there should be no leak down of psi.if you need to replace pump thier in the fuel tank ,someyukons had a axcess panel under carpet in back cargo area. good luck B.HARRIS A.S.E. cirtified
SOURCE: 2001 GMC Sonoma. SLS
Tilt the steering wheel down all the way and see if it starts, if it does then there is a main power wire loose in the steering columb. Thats all which comes to my mind at this time.
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