2024 Chevrolet Blazer RS, 4WDFACTORY OEM SERVICE PROCEDURE

Circuit/System Verification

NOTE:
  • DTC P15F7 is an informational DTC.
  • Diagnose all other K20 Engine Control Module DTCs prior to DTC P15F7.
  1. Verify there are no other K20 Engine Control Module or communication DTCs set.
    • Go to next step: If a DTC is not set 
  2. Complete the diagnosis by looking for an intermittent serial data circuit fault. Refer to Scan Tool Does Not Communicate with High Speed GMLAN Device .
    • If an intermittent serial data circuit fault is found 

      Repair as necessary.

    • Go to next step: If an intermittent serial circuit fault is not found 
  3. Clear DTCs and operate the vehicle in the conditions that the customer experienced.
  4. Verify DTC P15F7 does not set.
    • If the DTC sets 

      Replace the appropriate component: K182 Parking Assist Control Module

    • Go to next step: If the DTC does not set 
  5. All OK.
Factory Service Tools

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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.

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