Change distributor. this year model is easy. there's only one way to put distributor in/only goes in as long as you note position of rotor and set it back in with rotor pointing the same direction , no timing adjustment on it, it's controlled electronically.
SOURCE: 2003 yukon xl 5.3l flexfuel all plugs lean on passenger side
P0131 - Heated Oxygen Sensor (HO2S) Circuit Low Voltage
P1133 - Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 1 Sensor 1
Bank 1 Sensor 1
P0300 - Engine Misfire Detected
I would check for vacuum leaks, maybe intake or brake booster
SOURCE: 2002 gmc yukon, rich fuel code, low fuel pressure @40
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.
SOURCE: Engine died while driving, cranks but won't start.
not all scanners a created equal. You need to check for trouble codes...............but it must be fixec by now.
SOURCE: I have 96 gmc 350 vortec. missing really bad. Ive
ou need to check compression on all the cly. do you know which cly is dead?
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