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6.5L GM Diesel Glow Plug Harness Extension Assembly

6.5L GM Diesel Glow Plug Harness Extension Assembly

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Glow Plug Extension Harness Connector for 1992 - 2002 6.5L GM Turbodiesel

Most GMC/Chevrolet vehicles equipped with the 6.5L GM turbodiesel feature two of these glow plug harness extensions on the passenger side beneath the turbocharger. They are incorporated into the glow plug harness to increase the serviceability of the cylinder 4 and 6 glow plugs because there are heat shields attached to the exhaust manifold at these cylinders. This part of the glow plug harness is typically replaced with the glow plugs since the connectors tend to deteriorate. Please note that this item is sold individually and (2) are required per vehicle.

Need the harness side of this connector? Mates with RT-250801, fusible link glow plug harness connector


  • Made in the USA with primarily domestic materials
  • No cutting, no splicing; direct replacement part
  • OEM quality guaranteed - produced from OEM connectors and Military spec, aircraft grade wire
  • High temperature wire sleeve
  • Replaces GM 15320904, Dorman 645519, and Alliant Power AP0067


1992 - 1999 Chevrolet/GMC C2500/C3500 & K2500/K3500
1992 - 1998 Chevrolet/GMC C1500 & K1500
1992 - 2002 Chevrolet/GMC C3500HD
1994 - 1999 Chevrolet C2500 & K2500 Suburban
1995 - 1999 Chevrolet C1500 & K1500 Suburban
1995 - 1997 Chevrolet Tahoe
1995 - 1997 GMC Yukon
1996 - 1998 Chevrolet Express 2500/3500
1996 - 1998 GMC Savana 2500/3500

For standard replacement glow plug connectors, see: 6.5L diesel fusible link glow plug connector pigtails


Manufacturer: REID TEKK
Part Number(s): RT-250701
Interchange/Alt Part Numbers: GM 15320904
Alliant Power AP0067
Dorman 645519
Origin: USA
 Warranty: 1 yr UL mileage
Shipping Weight: 4 oz