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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2025TAHOE COMMERCIAL, 4WDREPAIR AND DIAGNOSISGENERAL INFORMATIONOEM GENERAL INFORMATIONVEHICLE DIAGNOSTIC SCAN TOOL INFORMATION (1 OF 2)SPECIFICATIONSK4 ASSIST STEP CONTROL MODULE: SCAN TOOL INFORMATION
2025 Chevrolet Tahoe Commercial, 4WD
K4 Assist Step Control Module: Scan Tool Information
2025 Chevrolet Tahoe Commercial, 4WDSECTION K4 Assist Step Control Module: Scan Tool Information
Scan Tool Data Parameters
| Parameter | Expected Value | Description |
|---|---|---|
| Operating Conditions: Ignition ON | ||
| Manual Deploy Status | Normal | Scan tool displays Unknown, Off, Extend to Passenger Position - Left and Right, or Extend to Cargo Position - Left and Right. |
| Left Assist Step Motor Current | 0 A | Scan tool displays the current amperage of the left assist step motor. |
| Left Assist Step Position | Retracted Position - Left | Scan tool displays Retracted Position - Left, Extend to Passenger Position - Left, Extend to Cargo Position - Left, or Extend to Service Position - Left. |
| Left Assist Step Position | Count Value | Scan tool displays the current left step position count. |
| Left Assist Step System Status | Retracted Position - Left | Scan tool displays Retracted Position - Left, Extend to Passenger Position - Left, Extend to Cargo Position - Left, or Extend to Service Position - Left. |
| Left Assist Step Learn Status | Yes | Scan tool displays Learned if the left step learn has been completed. |
| Left Front Door Ajar Switch | Inactive | Scan tool displays Inactive if the door is shut, and Active if the door is open. |
| Left Rear Door Ajar Switch | Inactive | Scan tool displays Inactive if the door is shut, and Active if the door is open. |
| Right Assist Step Motor Current | 0 A | Scan tool displays the current amperage of the right assist step motor. |
| Right Assist Step Position | Retracted Position - Right | Scan tool displays Retracted Position - Right, Extend to Passenger Position - Right, Extend to Cargo Position - Right, or Extend to Service Position - Right. |
| Right Assist Step Position | Count Value | Scan tool displays the current right step position count. |
| Right Assist Step System Status | Retracted Position - Right | Scan tool displays Retracted Position - Right, Extend to Passenger Position - Right, Extend to Cargo Position - Right, or Extend to Service Position - Right. |
| Right Assist Step Learn Status | Yes | Scan tool displays Learned if the right step learn has been completed. |
| Right Front Door Ajar Switch | Inactive | Scan tool displays Inactive if the door is shut, and Active if the door is open. |
| Right Rear Door Ajar Switch | Inactive | Scan tool displays Inactive if the door is shut, and Active if the door is open. |
| Headlamp Switch Signal | Off | Scan tool displays Unknown, Off, Auto, Park Lamps, Headlamp. |
| Exterior Lighting | Inactive | Scan tool displays Inactive or Active |
| System Power Mode | Varies | Scan tool displays Off, Accessory, Run, Start Request, or Propulsion Active. |
| Battery Voltage | Varies | Current voltage of battery. |
Scan Tool Output Controls
| Output Control | Description |
|---|---|
| Assist Step Courtesy Lamp | Turns the assist step courtesy lamp ON and OFF. |
| Extend to Passenger Position - Right | Commands the right assist step to the deployed position. |
| Extend to Service Position - Right | Commands the right assist step to the fully extended service position. |
| Retracted Position - Right | Commands the right assist step to the retracted position. |
| Extend to Passenger Position - Left | Commands the Left assist step to the deployed position. |
| Extend to Service Position - Left | Commands the Left assist step to the fully extended service position. |
| Retracted Position - Left | Commands the Left assist step to the retracted position. |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.