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.
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HOMESERVICE MANUALSGMC2003SONOMA 2D PICKUP, 4.3 X, AUTOMATICREPAIR AND DIAGNOSISGENERAL INFORMATIONCOMPUTER RELEARN PROCEDURESENGINE CONTROL MODULE OR POWERTRAIN CONTROL MODULESERVICE PROGRAMMING SYSTEM PASS-THRU PROCEDURENOTES
2003 GMC Sonoma 2D Pickup, 4.3 X, Automatic
Service Programming System Pass-Thru Procedure: Notes
2003 GMC Sonoma 2D Pickup, 4.3 X, AutomaticSECTION Notes
NOTE:
The Techline Information System (TIS) supports service programming with the Tech 2™ scan tool only.
Pass-Thru programming allows the scan tool to remain connected to the terminal and to the vehicle throughout the programming process. The vehicle must be in close proximity to the terminal while using Pass-Thru.
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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.