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  1. #1

    Default How long do stock spark plugs last?

    I was told that I don't need to change my spark plugs on my 2000 chevy silverado 1500 until it hits 100,000 miles. It has 89,000 now. It still runs fine, but should I change the plugs or leavem' till 100 grand? Thanks

  2. #2


    Quote Originally Posted by jayfire View Post
    I was told that I don't need to change my spark plugs on my 2000 chevy silverado 1500 until it hits 100,000 miles. It has 89,000 now. It still runs fine, but should I change the plugs or leavem' till 100 grand? Thanks
    Chevy States that the plugs are good 100k,.........With that being said I changed my out at 90,000 Miles along with a new set of wires.......I would said put in some new plugs.....All so the Vortec Engine's run better with the A/C Delco iridium Spark plugs.
    Last edited by 99'HEARTBEAT; 04-06-2010 at 04:31 PM.


    5.3 l 3.73 l G80

  3. #3


    i bought my silverado w/ 20k miles from the dealer. and since then, i never changed the sparkplugs. that being said, my truck now has 155k on the same spark plugs (which i'm guessing is the same one right out of the plant). so 100k should be right around the period of performance.
    2K Bowtie Silverado xCab 5.3L
    7" Fabtech Suspension Lift + 3" Perf Acc. Body Lift
    K&N Air Intake + Edelbrock Shorty Ceramic Headers + Flowmaster Super 10 Series dumped after muffler!
    Bridgestone Dueler 285/75/16 on stock rims
    SSBC Slotted Rotors & Pads
    HID Driving & Fog Lights

    (AR Bajas + ProComp 305/70/16) <-- seasonal set

  4. #4
    Master Mechanic bigdaddy77084's Avatar
    Join Date
    Jan 2010
    Houston, Texas, United States


    100k without regaping or cleaning..what fun is that..The 97 3500 at work burns plugs like crazy 30,000 miles max..
    95 tahoe 2dr 4x4 200,000+ miles

  5. #5


    I changed my plugs as soon as i got my truck, because the previous owner never changed them. They lasted 190,000km, divide that by 1.6 to see how many miles.
    2002 Chevrolet Silverado 1500 z71 1985 Chevrolet Silverado k10 2006 Chevrolet Silverado 2500hd 6.6l LLY Duramax
    6.5" BDS Suspension Lift Edelbrock Carb & Polished Intake Manifold & Valve Covers NAPC Race Transmission & NAPC Built Transfer Case
    EFI Live Comp Cam and Valvetrain Snow Performance Methanol Injection
    35" Toyo Open Country Mud Terrain on 18" Ion Alloy 179's Headman Long Tube Headers and True Dual Exhaust FASS 150gph Titanium Series Pump
    AirAid Cold Air Intake with K&N Dry Filter & AirAid PowerAid Throttle Body Spacer 2" Suspension Lift 33x12.50r15 Tires EFI Live & AFE Stage 2 Intake
    Pacesetter Long Tube Headers with Cats Gone True Dual Exhaust FlowPro 3.73 Gears Yukon Grizzly Locker with Mag-Hytec Cover & Traction Bars
    NGK Iridium Tips & MSD Ignition Plug Wires Baja Spare Tire Holder 33x13.5 Hankook rt03 18" XD Rims
    Innovate LC-1 Wideband o2 Sensor x2 HID's all around LED taillights and 3rd brake light
    BDS Dual Steering Stabilizers Pioneer Double-DIN Touchscreen Navigation with Two 10" Subs under rear seat
    Electric Fan Autometer Pressure, Boost, and Pyro Gauges
    4.56 Gears Airlift Air Bag Suspension

  6. #6
    Master Mechanic Silverado Junkie's Avatar
    Join Date
    Feb 2010
    Lead Hill, Arkansas


    Its true that vortecs run best on AC DELCO plugs. But mines not a vortec and ive always used Bosch Platinum 4's. They work great.
    1995 Silverado,Z71, 3-inch lift,2-inch leveling kit, SkyJacker Suspension, short ram-air intake, throttle body spacer, MSD ignition coil, straight pipes

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