Circuit designation are labeled on each wire, Available in universal or Chevy designation to custom fit your application, Includes wiring harnesses, all connectors, brackets, flashers, and zip ties, Kit has 21 total circuits and includes 12 fuses w/ horn relay and maxi fuse, Each wire is printed with the circuit identification as well as using GM color codes for easy installation Painless Wiring 10101 GM 21 Circuit Harness Sku # 91064029-CHEV Mfr. Part # 10101 Condition New Brand Painless Wiring Sold Each Details
This 21 circuit kit is our most widely used customizable chassis harness. You\'ll find that it\'s easily adaptable to almost any vehicle. We offer two versions, one with a preterminated GM column mounted ignition switch connector (10101 CHEV) and one without (10102 UNIV). Included with this harness are the following parts; a GM engineered fuse block & Painless mounting bracket; GM turn signal connectors; pre wired plugs for the headlights & dimmer switch; and each wire is printed with the circuit identification as well as using GM color codes for easy installation.
- Number of Circuits: 21 Circuit - 12 Fuses w/ Horn Relay and Maxi Fuse
- Harness Length: Universal
- Fuse Type: Blade
- Firewall Passthrough: Grommet
- Color Code Based: GM
- Circuit Designations: Printed on wire
Connectors Included (10101 CHEV): GM Steering Column Turn Switch and Ignition Switch, Dimmer Switch, Two Headlight Pigtails, 10SI & 12 SI Alternator, HEI Power and Tach and 20 Extra 56 Series Terminals for use with any Factory GM 56 Series Connector such as Headlight Switch, Wiper Switch or A/C Switch/Blower Motor.
Connectors Included (10102 UNIV): GM Steering Column Turn Switch, Two Headlight Pigtails, 10SI & 12 SI Alternator, Dimmer Switch
Choose from the Universal Harness or the GM Harness (Chevy) for use with GM column-mounted ignition switch.
This harness includes circuits for:
- A/C and Heat
- Accessory / Cigarette Lighter
- Backup Lights
- Brake Lights
- Charging
- Dome Light
- Electric Choke
- Emergency Flashers
- Fan Relay Activation Power
- Fused Power Source
- Headlights
- Horn (Relay)
- Ignition Coil
- Instrument Panel Lighting and Gauges*
- Park Lights
- Radio/Clock (Constant and Switched)
- Starting
- Tail Lights
- Third Brake Light
- Turn Signals
- Wipers
* Including Wires For:
Fuel Gauge
Oil Gauge
Tachometer
Temperature Gauge
Voltmeter
This harness includes circuits for:
- A/C and Heat
- Accessory / Cigarette Lighter
- Backup Lights
- Brake Lights
- Charging
- Dome Light
- Electric Choke
- Emergency Flashers
- Fan Relay Activation Power
- Fused Power Source
- Headlights
- Horn (Relay)
- Ignition Coil
- Instrument Panel Lighting and Gauges*
- Park Lights
- Radio/Clock (Constant and Switched)
- Starting
- Tail Lights
- Third Brake Light
- Turn Signals
- Wipers
* Including Wires For:
Fuel Gauge
Oil Gauge
Tachometer
Temperature Gauge
Voltmeter
Specs Number of Circuits 21 Fuse Block Included Yes Compatible with GM Column Yes Ignition Key Location Column Fuse Style ATO/ATC Harness Length Extra-Long Sold in Quantity Each MFG. Part # 10101 Notes Includes wiring harnesses, all connectors, brackets, flashers, and zip ties. GTIN Code 749823101012 Reviews I will definitely use there products in the future. Rated by Jake on April 27, 2026
Summary: Comes with clear instructions and I bought the one with the gm column connectors and they plugged right in
Yes, I recommend this product.
Quality product Rated by Captian on February 08, 2026
Summary: Googled it
Yes, I recommend this product.
Best wiring kit I've ever seen Rated by Rob S on December 24, 2025
Summary: So simple and complete for virtually any application
Yes, I recommend this product.
wire harness Rated by fast Jack on November 11, 2025
Summary: The best wire harness.Painless comes with a big book explaining everything.Well worth the extra money.Painless is in usa customer service is top notch.
Yes, I recommend this product.
Nice Rated by Hummer on November 09, 2025
Summary: Nice harness.Well marked an well made
Yes, I recommend this product.
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