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99 Tahoe starter problem

This is a discussion on 99 Tahoe starter problem within the Technical / Maintenance forums, part of the General Discussion category; I have a 1999 Tahoe 5.7 2wd last week i went to turn it on and sounded like it was ...

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    99 Tahoe starter problem


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    I have a 1999 Tahoe 5.7 2wd last week i went to turn it on and sounded like it was a diesel, loud engine noise, turned it off and back on and noise went away. So couple days ago i tried turning it on and it wouldnt crank sounded like a bad starter. I looked under the truck and see one of the starter bolts laying on the floor broken. Bought a new starter for the truck put it on with shims, truck still wont start and keeps breaking and bending the bolts. Replaced starter again thinking it was defective, now it just cranks but wont start. Im stumped!!!

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    Registered User bwood's Avatar
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    Re: 99 Tahoe starter problem

    It sounds like the crankshaft sensor. This is common and if you keep trying to start it, you could break the end/nose of the starter off or crack the block at the starter bolt holes. I believe there is a GM TSB on it. The sensor is located in the bottom pass side of the timing cover. The is also a relearn proceedure that you may or may not have to do after replacing it. Here is a sticky post from this forum that covers it I believe:

    http://www.fullsizechevy.com/forums/...t-relearn.html
    1998 GMC Sierra SLE 1/2 ton 2WD 305 Vortec
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    Re: 99 Tahoe starter problem

    Sounds more being like an ignition problem, back fire. Also checking flying wheel for missing teeth.
    Last edited by JZ57_CN; 01-01-2009 at 12:28 AM.

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    Registered User bwood's Avatar
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    Re: 99 Tahoe starter problem

    Here is a post from another forum:

    try this
    Subject: No/Hard/Slow Start, Backfire/Kickback (Replace Crankshaft Position Sensor) #00-06-04-014 - (03/28/2000)



    Models: 1999-2000 Cadillac Escalade

    1995-2000 Chevrolet and GMC S/T Models

    1996-2000 Chevrolet and GMC C/K, M/L , G, P Models

    1996-2000 Oldsmobile Bravada

    with 4.3 L, 5.0 L, 5.7 L or 7.4 L Engine (VINs W, X, M, R, J -- RPOs L35, LF6, L30, L31, L29)




    --------------------------------------------------------------------------------

    Condition
    Some customers may comment on one or more of the following conditions:

    Backfire during crank/start

    "Kickback" during crank/start

    "No" start

    "Slow" or "hard" start/crank

    "Grinding" or unusual noises during crank/start

    Cracked or broken engine block at the starter boss

    Broken starter drive housing

    Broken starter ring gear on flywheel

    Any combination of the above

    Cause
    A condition may exist that allows the crankshaft position sensor to command up to 50 extra degrees of spark advance during engine cranking only. This in turn exposes the engine to higher than normal cylinder pressures which may result in an inoperative condition to the starter drive housing, the engine flywheel starter ring gear, or the engine block at the outside edge of the starter boss.

    Correction
    Inspect for a stored powertrain DTC code P0338. This DTC will NOT illuminate the "Service Engine Soon" light. If this code is stored, the Crankshaft Position Sensor, P/N 10456607, MUST be replaced and the remaining components inspected for damage (engine block at the starter boss, the starter drive housing, and the engine flywheel starter ring gear).

    Notice: When DTC code P0338 is set, failure to replace the Crankshaft Position Sensor could result in repeated inoperative conditions of the starter or flywheel.

    Important: Some flywheel wear is normal; broken or missing teeth and/or cracks, are not normal.

    Parts Information
    Parts are currently available from GMSPO.

    Warranty Information
    For vehicles repaired under warranty, use:

    Labor Code
    Description
    Labor Time

    J4355
    Sensor, Crankshaft Position - Replace
    Use Published Labor Time
    1998 GMC Sierra SLE 1/2 ton 2WD 305 Vortec
    -Gibson Stainless Cat Back Swept Side
    -255/70 BFG Radial T/A on SS 15's



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    Re: 99 Tahoe starter problem

    Thanks BWOOD will be changing this sensor Sat. morning. Hope it isnt too difficult to get to.

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    Re: 99 Tahoe starter problem

    It is easy, there might be a little oil come out of the hole. Just be prepared to catch it. Make sure the new sensor comes with an oring. It is held in with a bracket that is made to the sensor and bolts to the timing cover.

    Here is the proceedure from the Chilton Manual:

    Disconnect neg terminal on batt
    Unplug electrical connector at Crankshaft PS
    Remove retaining bolt and remove the sensor

    Install sensor with new oring-lube oring w/ clean oil
    Install retaining bolt-be careful not to over tighten
    Attach electrical connector
    Attach neg terminal on batt

    Good Luck
    1998 GMC Sierra SLE 1/2 ton 2WD 305 Vortec
    -Gibson Stainless Cat Back Swept Side
    -255/70 BFG Radial T/A on SS 15's



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    Re: 99 Tahoe starter problem

    Just replaced it and nothing. Sounds like something is grinding when i crank it inside engine.

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    Re: 99 Tahoe starter problem

    maybe its the fly wheel like JZ57_CN said...
    02 GMC Sierra ECSB - Billet grille, and thats it
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    Registered User bwood's Avatar
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    Re: 99 Tahoe starter problem

    Have you checked to see if you have any stored trouble codes?
    1998 GMC Sierra SLE 1/2 ton 2WD 305 Vortec
    -Gibson Stainless Cat Back Swept Side
    -255/70 BFG Radial T/A on SS 15's



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    Re: 99 Tahoe starter problem

    did you ever figure this out?

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