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GM Genuine Parts 12135037 Multi-Function Diode

4.6 4.6 out of 5 stars 183 ratings
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Amazon's Choice in Automotive Replacement Alternator Diode Trios by GM Parts

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Purchase options and add-ons

  • Designed, engineered, tested, and warranted for GM vehicles.Fit Type: Vehicle Specific
  • Precise fit for ease of installation
  • For proper installation, locate your nearest GM dealer, independent service center, or body shop
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From the manufacturer

More parts to explore
Wire Product Image

GM Genuine Parts and ACDelco Wires and Cables

GM Genuine Parts Original Equipment and premium ACDelco Gold (Professional) aftermarket wire and cable products include high-quality spark plug wire sets, coil on plug boots, battery cables, pigtail/trailer connectors, lamp sockets, sensors, relays, and wiring harnesses all recommended by GM.

Wiring Harness Product Image

Wiring Harness Product Image

Wiring Plug Boot Product Image

Wire Sets Product Image

Pigtail Connectors

GM Genuine Parts Pigtail Connectors are ready to be spliced into vehicle harnesses. Their color-coded wires allow for easy installation and have protective coverings to help provide lasting durability. GM Genuine Parts offers an interactive catalog to help you find the right pigtail connectors for your vehicle.

Vapor Canister Vent Solenoid Harnesses

GM Genuine Parts Vapor Canister Vent Solenoid Harnesses connect the ventcontrol valve solenoid to the vehicle’s electrical system to help the system operate properly. Durable outer coverings help protect against tough conditions and moisture. Wires are also color coded for easy installation.

Coil on Plug Boots

ACDelco Gold (Professional) Coil on Plug Boots are made of a flexible, heat-resistant outer cover over a conductive spring that delivers the spark from the coil to the spark plug.

Ignition Wire Sets

Premium aftermarket ACDelco Ignition Wire Sets are engineered with full fiberglass braid and a silicone insulation. All ACDelco Spark Plug Wire sets features a carbon latex reactive layer that acts as a second protection to stainless windings.

Maintenance Tips and FAQ

  • Before purchasing and installing a socket assembly, make sure it’s the correct size and fit for your vehicle.
  • Are all bulb sockets the same? No. Some sockets have more contacts than others, depending on their function.
  • Is there a reason there’s grease in my old socket? Yes. It’s dielectric grease, which is designed to keep water out to protect the contacts from corrosion.
  • Does the ABS wheel-speed sensor harness need to be replaced when the sensor is replaced? No. The harness only needs to be replaced if it’s worn or cracked, or if the wire insulation is damaged.
  • Is an illuminated ABS light a possible sign of a malfunctioning wire harness? Yes. Your vehicle’s ABS light may illuminate for several reasons, and one potential cause is a malfunctioning wire harness.
  • Do all vehicles have ignition coil wires? No. Whether your vehicle has an ignition coil wire depends on the type of ignition system in your vehicle.
  • Are all ignition coil wires the same? No. Ignition coil wires come in different lengths with different boots at the ends.
  • Is the vapor canister vent solenoid harness weather-resistant? Yes. The harness helps protect the wires and pin connections from the elements.
  • Can a vent solenoid stick? Yes. A vent solenoid can stick open or closed, which may cause the Check Engine light to illuminate.

Product Description

Maintain your Chevrolet, Buick, GMC, or Cadillac vehicle with a Genuine GM Parts Multi Purpose Inline Diode. Only Genuine GM Parts are tested to meet GM Original Equipment standards and are designed specifically to fit your vehicle. WARNING: Cancer and Reproductive Harm

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GM Genuine Parts 12135037 Multi-Function Diode

GM Genuine Parts 12135037 Multi-Function Diode


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What's in the box

  • Multi Purpose Inline Diode
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    Customer reviews

    4.6 out of 5 stars
    4.6 out of 5
    183 global ratings
    Worked great with my 2013 toyota tundra agm battery
    5 Stars
    Worked great with my 2013 toyota tundra agm battery
    I had replaced my battery with a agm battery and was getting lower than desired voltage with it. I filed down the sides of this to fit perfectly where my alt-s fuse was. Started with no errors. If you do get an error it's because it is directional specific.
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    Reviewed in the United States on May 28, 2024
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    AJ
    5.0 out of 5 stars Worked great with my 2013 toyota tundra agm battery
    Reviewed in the United States on May 28, 2024
    I had replaced my battery with a agm battery and was getting lower than desired voltage with it. I filed down the sides of this to fit perfectly where my alt-s fuse was. Started with no errors. If you do get an error it's because it is directional specific.
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    Reviewed in the United States on March 28, 2024
    Reviewed in the United States on March 21, 2024
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    5.0 out of 5 stars FJ Cruiser AGM voltage booster
    Reviewed in the United States on December 3, 2023
    Did just what I needed it to. 13.8V increased to 14.5V to properly charge my NAPA 9834R AGM battery. Some trimming required. I used the wire wheel on a bench grinder to whittle away the excess.
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    One person found this helpful
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    Reviewed in the United States on March 2, 2024
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    Reviewed in the United States on November 30, 2023
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