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Thread: 2004 yukon awd- 5.3 i have no oil pressure- new comer to this! need help!

  1. #1
    Join Date
    Jan 2013
    Posts
    4

    2004 yukon awd- 5.3 i have no oil pressure- new comer to this! need help!

    first off, i just would like to say, i so wish i would of seen this site a few moths ago, its an amazing place to me as i a am a gm lover, always been-

    i will be giveing you a full description about the whole thing, almost the same as other threads, but a little different:

    i have bought a 2004 yukon in sc last year with 199k in mint, state condition throughout,for 3100 cash, the reason was the guy had no oil pressure, it would start to tap at start up, and then fade away in less then 10 seconds, or after driving it, well, since 1 and 1/2 years, drove like a dream, if im at a stop, it would go down to zero, and at full throttle go up to 43 percent, and a charm bell that got me so mad, never got used to it yet!

    last month, i drove to fill it up, left the station, and as i was driving, the suv started to tap, and tap, at full throttle, and the noise never went away! added oil, still the same, the oil pressure also remained the same, as day 1 i bought it? at this point im at 221k miles, drove it home at 5 miles an hour, parked it, and got a new oil pump installed, after the install, started the truck up, and same issue! tap, and tap, oil presure remains the same, slight smoke from tail pipe, paid 475 dollars for all installed with labor, new oil, and all gaskets, had it professionally installed.

    now! im kicking myself, should of bought a used motor for 400 more installed! what am i doing wrong? sending unit? oil lines?

    the mechanic gave gas, let it warm up, and slowly reved up the motor to 3,4,5k RPMS, and the oil pressure guage still reads low to 7 percent, and revs up to 45 percent at the most, and still tapping like heck! WHATS HAPPENING?

    ANY HELP WOULD BE GREAT! AS WE DO LOVE OUR YUKON, AND DONT WANT TO SPEND MORE NOW,
    THANK YOU GUYS SO MUCH,
    JOHN G,

  2. #2
    Join Date
    Mar 2012
    Location
    Colorado springs
    Posts
    115
    What type of oil are you using? Might be able to get something thicker might help. Personally, I'd start saving for a 6.0L

  3. #3
    Join Date
    Jan 2012
    Location
    DFW, TEXAS
    Posts
    596
    at 199k it had no oil pressure; you put 20k miles on an engine with no oil pressure. I would call GM and thank them!either rebuild or swap it. the damage is already done. if you dont wanna spend more.... sell it.

  4. #4
    Join Date
    Aug 2007
    Location
    Honeywood, Ontario
    Posts
    7,112
    Your engine is now a boat anchor. Thank you and please try again.
    2006 Silverado
    Little Black Bitch

  5. #5
    Join Date
    Jan 2012
    Location
    Anacoco, La
    Posts
    433
    I'm gonna say ur gauge is telling u stories, ur hearing the norm lifter tap that we all hear on those motors, ur smoke is prob cause its wore out ur u have a PVC issue. But I agree I'd be looking at a u-pull it for a new heart for ur ride.

  6. #6
    Join Date
    Jan 2013
    Posts
    4
    well, i agree with you guys, but yea, i had bad oil in there for the past 10k miles, there is no knock, but it does have a tap, like rockers banging with no oil in there, tomorrow my mechanic will be doing a new sending unit, should of tried that first! but i will let you guys know of the out come on that!
    the mechanic did also say the oil looked clean, but dirty, no metal shavings, but if the sending unit fails?
    i will be installing a new motor next week,
    but if you guys went threw the same issue? if you can please let me know, before i buy a newer motor,
    thanks again,
    john
    houston tx,

  7. #7
    Join Date
    Jan 2013
    Posts
    4
    thanks frenchy,
    will do!

  8. #8
    Just get unit first try that another hard to take intake off and buy the speacial socket for and there y'all go.

  9. #9
    Join Date
    Apr 2011
    Location
    Texas
    Posts
    296
    Take it to a GM service dept and have the cluster swept.
    I replace 2 to 3 cluster in the 03-07 classic gmt800s a week.
    Your cluster could be lieing to you.
    If the cluster check out good then you have trash inside your oiling lines somewhere
    2006 Silverado aka (Bad Bitch)
    K&N CAI, Diablo Predator, muffler delete, and a vette servo. 14.7x @ 93 mph (sold)

    1998 SS Camaro aka (Silver Bullet)
    LS6 intake, ported TB, LTs, ORY, cut out, and a pantie dropping tune by Nelson. 12.6 @ 110 mph 327 hp 347 tq

    2011 ecsb silverado aka (silver sleeper)
    forged 6.2 and a small snail

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