Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1848 (WIRING SYSTEMS AND POWER MANAGEMENT - SPLICE PACK CONNECTOR END VIEWS)SPLICE PACK CONNECTOR END VIEWSJX221

2006 Chevrolet Suburban C2500, 6.0 U

Splice Pack Connector End Views: JX221

2006 Chevrolet Suburban C2500, 6.0 USECTION JX221

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: JX221

Courtesy of GENERAL MOTORS CORP.

JX221

Pin	Wire	Circuit	Function
A	0.35 D-GN	5060	Low Speed GMLAN Serial Data
B	0.35 D-GN	5060	Low Speed GMLAN Serial Data
B	0.35 D-GN	5060	Low Speed GMLAN Serial Data (HP2)
C	0.35 D-GN	5060	Low Speed GMLAN Serial Data (EXP or Y91 with UE1)
D	0.35 D-GN	5060	Low Speed GMLAN Serial Data
E	0.35 D-GN	5060	Low Speed GMLAN Serial Data
E	0.35 D-GN	5060	Low Speed GMLAN Serial Data (HP2)
F	0.35 D-GN	5060	Low Speed GMLAN Serial Data (AN3, DL3 or HP2)
G	0.35 D-GN	5060	Low Speed GMLAN Serial Data
H	0.35 D-GN	5060	Low Speed GMLAN Serial Data (AN3, DL3 or HP2)
J	0.35 D-GN	5060	Low Speed GMLAN Serial Data
K	0.35 D-GN	5060	Low Speed GMLAN Serial Data (Y91)
K	0.35 D-GN	5060	Low Speed GMLAN Serial Data (Y91 or U2K)
L	0.35 D-GN	5060	Low Speed GMLAN Serial Data
M	0.35 D-GN	5060	Low Speed GMLAN Serial Data

Connector Part Information

Harness: Instrument Panel
OEM: 15305291
Service:15305291
Description: 12-Way F Metri-Pack 280 Splice Saver SGL (BK)

Terminal Part Information

Terminal/Tray: 12110844/4
Core/Insulation Crimp: E/C
Release Tool/Test Probe: 15315247/J-35616-4A (PU)

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.