1966 GMC L3500
1966 GMC L3500 Spark Plug

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1966 GMC L3500 Spark Plug

1966 GMC L3500 Spark Plug

Your 1966 GMC L3500 might be the best vehicle you’ve ever owned. Or you may just be struggling to keep it highway-approved. No matter the situation, Advance Auto Parts has the Spark Plug product you desperately need.

We currently carry 20 Spark Plug products to choose from for your 1966 GMC L3500, and our inventory prices range from as little as $1.99 up to $6.49.

On top of low prices, Advance Auto Parts offers 5 different trusted brands of Spark Plug products for the 1966 GMC L3500. We only sell parts from trusted brands like Autolite so that you can find quality parts you can count on.

Don’t take our word for it - check out customer ratings and reviews to buy with confidence. We have 315 reviews on our Spark Plug products for the 1966 GMC L3500 from previous customers.

Have parts delivered straight to your home, or find the nearest Advance Auto Parts store to check out our Spark Plug stock in-person!

Spark Plug for Your 1966 GMC L3500

Search through our amazing selection of Spark Plug products for your 1966 GMC L3500 to find exactly what you’re looking for. Compare prices and reviews to choose the best part for you.

  • Conventional Spark Plug

    ACDelco - Conventional Spark Plug (Part No. R44XLS)

    Description
    5.0
    Read 3 review(s)

    from $2.99

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  • Single Platinum Spark Plug

    Autolite - Single Platinum Spark Plug (Part No. AP65)

    Description
    5.0
    Read 3 review(s)

    from $3.79

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  • Single Platinum Spark Plug

    Autolite - Single Platinum Spark Plug (Part No. AP85)

    Description
    5.0
    Read 3 review(s)

    from $3.79

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  • Premium DiamondFIRE Electrode Automotive Spark Plug

    E3 - Premium DiamondFIRE Electrode Automotive Spark Plug (Part No. E3.52)

    Description
    5.0
    Read 3 review(s)

    from $6.49

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  • Copper Resistor Spark Plug

    Autolite - Copper Resistor Spark Plug (Part No. 65)

    Description
    5.0
    Read 3 review(s)

    from $2.89

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  • Platinum Power - Boxed - RN14PMC

    Champion - Platinum Power - Boxed - RN14PMC (Part No. 3405)

    Description
    5.0
    Read 1 review(s)

    from $3.99

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  • Copper Plus Small Engine- Boxed - J6C

    Champion - Copper Plus Small Engine- Boxed - J6C (Part No. 823)

    Description
    5.0
    Read 1 review(s)

    from $2.49

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  • Conventional Spark Plug

    ACDelco - Conventional Spark Plug (Part No. R43S)

    Description
    4.5
    Read 3 review(s)

    from $2.99

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  • Copper Resistor Spark Plug

    Autolite - Copper Resistor Spark Plug (Part No. 85)

    Description
    4.5
    Read 3 review(s)

    from $2.89

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  • Copper Plus- Boxed - RN12YC

    Champion - Copper Plus- Boxed - RN12YC (Part No. 404)

    Description
    4.5
    Read 3 review(s)

    from $2.49

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  • Premium DiamondFIRE Electrode Automotive Spark Plug

    E3 - Premium DiamondFIRE Electrode Automotive Spark Plug (Part No. E3.46)

    Description
    4.0
    Read 3 review(s)

    from $6.49

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  • Spark Plug Non-Foulers - 14mm Gasket Seat Long Reach

    Dorman - Help - Spark Plug Non-Foulers - 14mm Gasket Seat Long Reach (Part No. 42004)

    Description
    1.0
    Read 1 review(s)

    from $5.49

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  • Copper Plus- Boxed - RJ12YC

    Champion - Copper Plus- Boxed - RJ12YC (Part No. 14)

    Description

    from $2.99

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  • Double Platinum Spark Plug

    Autolite - Double Platinum Spark Plug (Part No. APP65)

    Description

    from $5.49

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  • Copper Resistor Spark Plug

    Autolite - Copper Resistor Spark Plug (Part No. 404)

    Description

    from $2.89

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  • Copper Plus- Boxed - RJ6C

    Champion - Copper Plus- Boxed - RJ6C (Part No. 102)

    Description

    from $2.49

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  • Copper Plus- Boxed - J12YC

    Champion - Copper Plus- Boxed - J12YC (Part No. 10)

    Description

    from $2.19

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  • Copper Plus Small Engine- Boxed - RN5C

    Champion - Copper Plus Small Engine- Boxed - RN5C (Part No. 123)

    Description

    from $2.19

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  • Copper Plus- Boxed - N12YC

    Champion - Copper Plus- Boxed - N12YC (Part No. 38)

    Description

    from $1.99

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  • Copper Plus Small Engine- Boxed - N5C

    Champion - Copper Plus Small Engine- Boxed - N5C (Part No. 120)

    Description

    from $1.99

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What are the top-rated 1966 GMC L3500 Spark Plug products?

Top-rated Spark Plug products for your 1966 GMC L3500 based on customer reviews/ratings are:
E3 Premium DiamondFIRE Electrode Automotive Spark Plug
3.8
They seem to be as advertised. I can tell a difference in performance so we'll just have to put more miles on the vehicle to see if there is any impro
E3 Premium DiamondFIRE Electrode Automotive Spark Plug
5
I can't really rate the plugs on performance yet since its been snowing here since I installed them, but the old sled sure starts a lot easier.