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2000 Silverado 1500 5.3L spark plug gap 0.040 or 0.060?

This is a discussion on 2000 Silverado 1500 5.3L spark plug gap 0.040 or 0.060? within the Technical / Maintenance forums, part of the General Discussion category; I bought ACDelco plugs that were supposedly pregaped. I didn't have my manual with me when I changed the plugs, ...

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    2000 Silverado 1500 5.3L spark plug gap 0.040 or 0.060?


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    I bought ACDelco plugs that were supposedly pregaped. I didn't have my manual with me when I changed the plugs, I did notice that the ones that I removed were gapped at 0.060 and the new ones were 0.040? Even though I asked at the parts store several times if they were really pre-gaped, they were wrong, right? Today I called the same dealer and talked the service department and they said the plugs should they should be gapped at 0.060 but yesterday at the same dealer the parts department told me that the gap should 0.040. Anyone know why there is this discrepancy
    Thanks
    Eric

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    Re: 2000 Silverado 1500 5.3L spark plug gap 0.040 or 0.060?

    GM came out with a TSB indicating that the new plugs are pre-gapped at .040 and not to regap them. Attempting to change the gap can damage the tip.
    2002 GMC Sierra 4.8 RCLB 4x4 - Blackbear Tune

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    Re: 2000 Silverado 1500 5.3L spark plug gap 0.040 or 0.060?

    there use to be a sticker on the fan shroud....with specs for spark gap an proper fan belt routing...check there...

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    Re: 2000 Silverado 1500 5.3L spark plug gap 0.040 or 0.060?

    Document ID# 1396703


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


    Subject: Information on New Spark Plugs and Gapping #03-06-04-060 - (10/24/2003)



    Models: 2004 Buick Ranier

    2002-2004 Cadillac Escalade, Escalade EXT

    2003-2004 Cadillac Escalade ESV

    2004 Cadillac CTS-V

    1997-2004 Chevrolet Corvette

    1998-2002 Chevrolet Camaro

    1999-2004 Chevrolet Silverado

    2000-2004 Chevrolet Suburban, Tahoe

    2002-2004 Chevrolet Avalanche

    2003-2004 Chevrolet Express, TrailBlazer

    1999-2004 GMC Sierra

    2000-2004 GMC Yukon, Yukon XL

    2001-2004 GMC Yukon Denali, Yukon XL Denali

    2002-2004 GMC Sierra Denali

    2003-2004 GMC Envoy XL

    1998-2002 Pontiac Firebird

    2004 Pontiac GTO

    2003-2004 Hummer H2

    with 4.8L, 5.3L, 5.7L or 6.0L V-8 Engine (VINs V, P, T, Z, G, S, N, U -- RPOs LR4, LM4, LM7, L59, LS1, LS6, LQ9, LQ4)




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

    A new spark plug has been released for use in the above vehicles. The new spark plug has an Iridium tip instead of the current Platinum tip. Due to the different tip design, the gap of the spark plug has also changed. The new spark plug, P/N 12571164 with AC Delco P/N 41-985, is gapped to 1.01mm (0.040 inches) when the spark plug is made. The spark plug gap is set during manufacturing and should not be changed or damage to the spark plug may result. Any new spark plug found to not be properly gapped should not be used.



    GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
    WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


    Copyright General Motors Corporation. All Rights Reserved
    05 GMC Sierra, Ext Cab, 5.3

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    Re: 2000 Silverado 1500 5.3L spark plug gap 0.040 or 0.060?

    2000 LS Silverado 5.3L V-8 Automatic

    100K miles, Flex-a-Lite fans, K&N CAI, Magnaflow Muffler, Big 3

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    Old Geezers know stuff... dlstewart01's Avatar
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    Re: 2000 Silverado 1500 5.3L spark plug gap 0.040 or 0.060?

    Quote Originally Posted by Jewell View Post
    The GM bulletin supersedes the sticker..... Unless you use the old type platnum plugs.
    Last edited by dlstewart01; 01-28-2010 at 10:13 AM.
    05 GMC Sierra, Ext Cab, 5.3

    "Never argue with an idiot. They will bring you down to their level and beat you with experience."

    3/5 Cav, C Troop, Blacks Knights, Vietnam, 1969

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    Re: 2000 Silverado 1500 5.3L spark plug gap 0.040 or 0.060?

    dlstewart01... I am always thankful for your replies as they are always full of up to date and informative technical bulletins.

    That being said, you wouldn't happen to know when GM might be releasing a TSB or recall to own up for the shotty metal brake lines they plumbed our trucks with? Toyota owns up to sticking accelerators, so GM ought to take responsibility for failing brakes. Somehow I don't think this will ever happen so I won't hold my breath.
    Last edited by Tweaks; 01-28-2010 at 10:50 AM.
    00 RCSB Z71/JBA cat-back/Z71 Tahoe valance/EBC slotted&drilled rotors with SS lines & SS braided hoses/Edelbrock headers/BB tune/6000k HID low beam & fog lamps/Auto-headlight disable mod(nice)/Vette servo/LT1 E-fans/LED gauge cluster/Titan 18" wheels/Rollpan/Belltech rear sway bar/2-4 drop

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    Old Geezers know stuff... dlstewart01's Avatar
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    Re: 2000 Silverado 1500 5.3L spark plug gap 0.040 or 0.060?

    Quote Originally Posted by Tweaks View Post
    dlstewart01... I am always thankful for your replies as they are always full of up to date and informative technical bulletins.

    That being said, you wouldn't happen to know when GM might be releasing a TSB or recall to own up for the shotty metal brake lines they plumbed our trucks with? Toyota owns up to sticking accelerators, so GM ought to take responsibility for failing brakes. Somehow I don't think this will ever happen so I won't hold my breath.
    I did work in a GM dealership in 04 and 05. I am retired now but still have a few contacts. I have heard nothing on this but will ask.

    I try to post supporting evidence with my answers. I hate to post just opinion. The Internet is full of opinions. Speaking of....

    I'm not sure that Toyota has owned up to any thing. they are still playing the blame game. I don't believe they know what the problem is yet...

    Have a good one.
    Last edited by dlstewart01; 01-28-2010 at 11:20 AM.
    05 GMC Sierra, Ext Cab, 5.3

    "Never argue with an idiot. They will bring you down to their level and beat you with experience."

    3/5 Cav, C Troop, Blacks Knights, Vietnam, 1969

 

 

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