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Old 08-08-2015, 12:58 AM   #1
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Default '99 Yukon randomly stalls

'99 Yukon stalling randomly.. No loss of power turns off just like ya shut the key off.. Any ideas anyone??

Have replaced
Mass air flow
Throttle position
Idle air control
Crankshaft position
Ignition control
Ecm/pcm
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Old 08-08-2015, 09:55 AM   #2
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Any clue on hold old the fuel pump is?
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Old 08-08-2015, 09:57 AM   #3
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Not 100% but was supposed to have been replaced just before I purchased the truck also never acts like she is starving for fuel..
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Old 08-15-2015, 01:19 PM   #4
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Replaced the fuel filter on the Yukon lately?
Probably best to get some psi readings with a fuel pressure gauge attached to rails.
Would like to see if there are any stored OBD2 codes as well.
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Old 08-15-2015, 01:27 PM   #5
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Just replaced that also... No obd codes... Got it fixed yesterday tho!!! Went ahead and dropped the tank and replaced the fuel pump and thats what it was... Should have done that alot sooner but was supposed to have a new pump in it well it did but no filter on the bottom. So I presume sediment was getting in and clogging the pump..
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Old 08-15-2015, 02:08 PM   #6
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Thanks for posting back. Good to hear with the new pump all is well!
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