P1503 GMC Possible Causes
- Faulty Theft Deterrent System
- Theft Deterrent System program
First diagnose P1503 GMC code
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.
Cost of diagnosing the P1503 GMC code
Labor: 1.0The cost of diagnosing the P1503 GMC code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
P1503 GMC Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1503 GMC MeaningWith the engine cranking, the Powertrain Control Module (PCM) received a frequency code that did not match the code it received from the theft deterrent module.
P1503 GMC More InformationNeed more information on how to fix the P1503 GMC code?
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