2003 Chevrolet Monte Carlo LSFACTORY OEM SERVICE PROCEDURE

Verifying Reprogramming

NOTE: Vehicles will require that Crankshaft Variation Learn or Theft Deterrent Relearn procedures be performed after programming. See CKP SYSTEM VARIATION LEARN PROCEDUREΒ  and PROGRAMMING THEFT DETERRENT SYSTEM COMPONENTSΒ  .

Verify the PCM programming was successful using the following procedure:

  1. Turn ignition switch to OFF position for 30 seconds.
  2. Start the engine.
  3. If the vehicle does not start or starts but runs rough, repeat the SPS procedure.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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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.

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