Attention: Concerning COVID-19 update
  • As seen on
    Scroll to Top

    Painless Performance

    Wiring Harness, Painless Performance, 64-88 GM, 21-Circuit

    Vehicle Specific fits 20 models
    0 Reviews
    Part# L240316
    You Save $50.96
    FREE Shipping!
    Low Stock
    Only a few left for immediate delivery

    Wiring Harness, Painless Performance, 64-88 GM, 21-Circuit

    Bring your electrical system up-to-date with one of these new harnesses from Painless Wiring. Aftermarket accessories can put heavy loads on factory wiring and possibly cause harm. These new harnesses use the highest quality thermal crossed-linked (TXL) polyethylene wire rated up to 275 degrees—that's twice the load of standard wire! Depending on application and accessories, choose between 12-circuit or 18-circuit versions.


    • NOTE1: Part# L240316 and L240317 minor bulkhead modifications may be required. NOTE2: These high-performance items are not eligible for any further discounts or promotional pricing.
    WARNING: This product can expose you to chemicals including lead, sulfur, nickel, chromium, vanadium, titanium, polyvinyl chloride, and 4,4’-methylenebis (2-chloroaniline), which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to

    Vehicle Fitment

    Make & Model Year Range Application Details
    Buick Grand National 82 21-circuit Classic
    Buick Grand National 84-87 21-circuit Classic
    Buick Regal 78-87 21-circuit Classic
    Buick Riviera 63-76 21-circuit Classic
    Buick Skylark 64-72 21-circuit Classic
    Buick T-Type 83-87 21-circuit Classic
    Chevrolet Chevelle 64-77 21-circuit Classic
    Chevrolet Corvair 60-69 21-circuit Classic
    Chevrolet Corvair 95 FC 61-65 21-circuit Classic
    Chevrolet El Camino 64-88 21-circuit Classic
    Chevrolet Malibu 78-83 21-circuit Classic
    Chevrolet Monte Carlo 70-74 21-Circuit Classic
    Chevrolet Monte Carlo 78-88 21-Circuit Classic
    Oldsmobile Cutlass 61-77 21-circuit Classic
    Pontiac Bonneville 55-77 21-circuit Classic
    Pontiac Catalina 55-77 21-circuit Classic
    Pontiac Grand Prix 62-77 21-circuit Classic
    Pontiac GTO 61-74 21-circuit
    Pontiac LeMans 61-74 21-circuit
    Pontiac Tempest 61-74 21-circuit
    • Have a Question? Chat with an Expert or Call 1‑800‑243‑8355
      Mon-Fri 7:30am-5pm | Sat 10am-3pm PT Experts are currently offline
    • Low Prices. Price Match Guarantee
    • Car Part Experts. We know car parts
    • Guaranteed Fitment. 100% factory accurate
    • Superior Selection. Largest selection of in-stock parts

    Reviews (0)

    Wiring Harness, Painless Performance, 64-88 GM, 21-Circuit
    Painless Performance Wiring Harness, Painless Performance, 64-88 GM, 21-Circuit