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Painless Performance

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

Vehicle Specific fits 20 models
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Part# L240316
You Save $50.96
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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
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Wiring Harness, Painless Performance, 64-88 GM, 21-Circuit
Painless Performance Wiring Harness, Painless Performance, 64-88 GM, 21-Circuit