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.
2021 GMC Yukon AT4FACTORY OEM SERVICE PROCEDURE
Fastener Specifications
Electric Belt Drive Rack and Pinion Steering Gear
Power Steering Assist Motor
| Callout | Component Name [Component Quantity] | Single Use Fastener/Component | Thread Locking Adhesive Required | Specification | Procedure |
|---|---|---|---|---|---|
| Metric (English) | |||||
| 1 | Steering Gear Bolt [ 6x ] | Yes | - | 28 N.m (21 lb ft) | Power Steering Assist Motor Replacement |
| 2 | Power Steering Assist Motor Seal @ Electric Belt Drive Rack and Pinion Steering Gear | Yes | - | - | Power Steering Assist Motor Replacement |
| 3 | Power Steering Assist Motor Bolt [ 4x ] | Yes | - | 28 N.m (21 lb ft) | Power Steering Assist Motor Replacement |
| 4 | Electric Belt Drive Rack and Pinion Steering Gear Belt | Yes | - | - | Power Steering Assist Motor Replacement |
| 5 | Power Steering Assist Motor Seal @ Power Steering Assist Motor | Yes | - | - | Power Steering Assist Motor Replacement |
Steering Gear Boot
| Callout | Component Name [Component Quantity] | Single Use Fastener/Component | Thread Locking Adhesive Required | Specification | Procedure |
|---|---|---|---|---|---|
| Metric (English) | |||||
| 1 | Steering Gear Boot Inner Clamp | Yes | - | - | Steering Gear Boot Replacement (With RC1) , or Steering Gear Boot Replacement (Without RC1) |
Factory Service Tools
Use the Manual With the Right Hardware
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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.