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 MANUALSGMC2011YUKON BASE, 5.3 0, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTIGNITION SWITCH/STEERING LOCKWIRING SYSTEMS AND POWER MANAGEMENT - DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC INFORMATION AND PROCEDURESPOWER MODE MISMATCHCOMPONENT TESTING
2011 GMC Yukon Base, 5.3 0, RWD
Component Testing
2011 GMC Yukon Base, 5.3 0, RWDSECTION Component Testing
Ignition Switch
- Ignition OFF, disconnect the harness connector at the ignition switch.
- Verify the resistance between the terminals listed below match for each ignition switch position.
- If not the specified value, replace the ignition switch.
Resistance Test
| Ignition Switch Position | Terminals 2 and 4 | Terminals 3 and 4 | Terminals 4 and 5 | Terminals 4 and 6 | Terminals 5 and 6 |
|---|---|---|---|---|---|
| Off Key Out | Infinite | Infinite | Infinite | Infinite | Infinite |
| Off Key IN | Infinite | Infinite | < 5.0 Ξ© | Infinite | Infinite |
| Accessory | Infinite | < 5.0 Ξ© | Infinite | Infinite | Infinite |
| Run | < 5.0 Ξ© | < 5.0 Ξ© | Infinite | Infinite | < 5.0 Ξ© |
| Start | < 5.0 Ξ© | Infinite | Infinite | Infinite | 1275-1325 Ξ© |
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.