Standard Ignition S-1721 Tail Light Socket

Brand Standard Ignition S-1721
Connector Gender Male
Contents Includes Butt Splices
Terminal Gender Female
Terminal Type Blade Terminal
Fits Pontiac, Buick, Chevrolet, GMC, and Oldsmobile · 34 vehicles

OE direct replacement. Designed to fix common failure issues when original equipment fails.

High-grade materials. Built for strong conductivity and reliable electrical connections.

Blade terminal design. A practical socket solution for electrical repair jobs.

Cross-references Dorman - TECHoice 645-607, MTC/Ronak 1100 and Premium Guard PT1219 for the same application. See all 8.

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Tail Light Socket for OE-Style Repair

Standard Ignition S-1721 is a tail light socket built for electrical repair work where a damaged connector or worn terminal can cause lighting faults. It uses high-grade materials to support strong conductivity and secure blade-terminal contact for dependable rear lamp operation.

Compatible With 2002-2007 Chevrolet Trailblazer, 2002-2006 Chevrolet Trailblazer EXT, 2004-2007 Buick Rainier, 2002-2005 GMC Envoy, 2002-2005 GMC Envoy XL, 2004-2005 GMC Envoy XUV, 2004-2006 Chevrolet SSR, 2002-2004 Oldsmobile Bravada, and 2006-2008 Pontiac Grand Prix applications.

Key Features

  • Tail light socket for electrical socket repair and replacement
  • Male connector with one connector interface
  • Female blade terminals for secure electrical contact
  • Two-wire design for rear lighting circuits
  • Includes butt splices for wiring repair
  • Built with materials selected to support conductivity and connection quality

Detailed Description

Standard Ignition S-1721 is engineered for technicians replacing a failed tail lamp socket on vehicles such as the Chevrolet Trailblazer, GMC Envoy, Buick Rainier, and Pontiac Grand Prix. The socket is designed around a male connector layout with female blade terminals, making it a practical choice when the original socket shows heat damage, corrosion, looseness, or intermittent contact. This part cross-references Dorman - TECHoice 645-607 for the same application.

Standard Ignition’s electrical pigtails and sockets are developed for repair jobs where original equipment connectors fail from age, vibration, or moisture intrusion. S-1721 follows that repair-focused approach with a two-wire configuration and included butt splices to support a clean harness repair.

Common Repair Uses

  • Restores tail light function after socket corrosion
  • Fixes intermittent rear lamp operation caused by poor terminal contact
  • Addresses melted or heat-damaged socket housings
  • Repairs broken or loose wiring at the tail lamp connector
  • Corrects lighting faults on rear lamp circuits in GM and Pontiac applications

Installation Notes and Tips

Verify connector style, terminal layout, and vehicle application before installation. Match the existing tail light wiring and inspect the lamp housing for heat damage or moisture before installing the new socket. Use proper splice technique and confirm a solid terminal fit to help prevent repeat electrical issues.

Quality Assurance

Standard Ignition supports this socket with decades of electrical component development focused on technician repair needs. The brand uses high-grade materials and application-driven design to help deliver consistent conductivity and reliable connections in service repairs.

This part fits 34 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2008PontiacGrand PrixN/A—
2007BuickRainierN/A—
2007ChevroletTrailblazerN/A—
2007PontiacGrand PrixN/A—
2006BuickRainierN/A—
2006ChevroletSSRN/A—
2006ChevroletTrailblazerN/A—
2006ChevroletTrailblazer EXTN/A—
2006PontiacGrand PrixN/A—
2005BuickRainierN/A—
2005ChevroletSSRN/A—
2005ChevroletTrailblazerN/A—
2005ChevroletTrailblazer EXTN/A—
2005GMCEnvoyN/A—
2005GMCEnvoy XLN/A—
2005GMCEnvoy XUVN/A—
2004BuickRainierN/A—
2004ChevroletSSRN/A—
2004ChevroletTrailblazerN/A—
2004ChevroletTrailblazer EXTN/A—
2004GMCEnvoyN/A—
2004GMCEnvoy XLN/A—
2004GMCEnvoy XUVN/A—
2004OldsmobileBravadaN/A—
2003ChevroletTrailblazerN/A—
2003ChevroletTrailblazer EXTN/A—
2003GMCEnvoyN/A—
2003GMCEnvoy XLN/A—
2003OldsmobileBravadaN/A—
2002ChevroletTrailblazerN/A—
2002ChevroletTrailblazer EXTN/A—
2002GMCEnvoyN/A—
2002GMCEnvoy XLN/A—
2002OldsmobileBravadaN/A—
Directly replaces or cross-references 8 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Dorman - TECHoice — 645-607MTC/Ronak — 1100Premium Guard — PT12191P173257-551315306358EC1218PTA1824