02 yukon died on freeway electric problem or fuel

There is no close to start ,something is missing spark or fuel pressure . If it died on the freeway the fuel pump quit working or something in the ignition system did . The engine spins when you turn the key to the start position ? Crank - no start No Start Diagnostic Basics EricTheCarGuy

I guess you mean engine dies? You need to determine if the issue is fuel or spark. If spark, it will die flat, fuel often will sputter as it dies. If you can hook up fuel pressure gauge so that you can see it while driving this might help. If you think it is spark issue, check coil and ignition module, crank/cam sensor. Is this random or is there some pattern, such as amount of time driven?

My suggestion would be to check it with a mechanical gauge.
You would need to use a Tee fitting to use the sensor to have fuel pressure.
If the mechanical gauge shows steady pressure at idle, it could be a problem in the wiring or the instrument cluster.

Check by the fuel tank


Have someone turn the key on
& listen for fuel pump

Put a pressure gauge on the motor
at fuel rail & check pressure

Pump only runs for 3 sec, if you got no crank signal
or it fails to start

Have to cycle key

Camshaft sensor

vacuum leak? or try the fuel pressure regulator my started stalling then got to where it wouldn't crank. changed the fuel pressure regulator and it ran as if it was brand new

just fixed this problem, change your fuel pump module, fuel sending unit shorts out on fuel level swing arm blue wire... unfortinately you must replace it as unit because of the design, fuel pump and tank guage fuel level sending unit are a one peice item, fuel tank has to come out to change unit, about a $ 700.00 repair too... fuel pump module runs about 350 to 700 $ depending on aftermarket or factory, try to find one with a lifetime warranty even if it is $ 50.00 more worth it..labor is about $ 250 to $ 400 depending on shop labor rate... definate problem though I ahve no doubt, common problem on GM... please rate my help, thanks...

which gauge flickers. When last did u changed your fuel filter I usually changed it every 6 months and they are not very expensive. ONce your fuel filter is dirty eventually some debris will come out of the filter then it will go to your injectors and that is not good.

You need to have the fuel pressure tested while driving and this can be done, and with the gage. I hook up the gage to the fuel valve and put the gauge facing the windshield and wire tie it to the wipers to see if the fuel pump is bad, if the fuel pressure ranges at 30 PSI I would put a load on it to see if the fuel pressure dropped under those conditions you are driving. I would also test the fuel pressure regulator to see if it gave full fuel that means pulling off the hose and making the fuel rail pressure 50 pounds per square inch. If the regulator passed the test then I WOULD SUSPECT THE FUEL PUMP HAS QUIT. A 2002 is old enough to have this happen they wear out so I hope this helps and gives you an ideal of what to fix.

Change the coil pack if your getting No spark.Or the crankshaft sensor.