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.
1998 Chevrolet Pickup K3500, 4D Pickup, 6.5 F, StandardFACTORY OEM SERVICE PROCEDURE
Data Link Communication System DTCS
DATA LINK COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| U1016 | LOSS OF COMMUNICATIONS WITH PCM/VCM |
| U1026 | LOSS OF TRANSFER CASE SHIFT CONTROL (ATC) MODULE CLASS 2 COMMUNICATION |
| U1041 | LOSS OF EBCM COMMUNICATION |
| U1192 OR U1193 | LOSS OF EVO/PASSLOCK™ OR VEHICLE IMMOBILIZER MODULE (VIM) CLASS 2 COMMUNICATION |
| U1255 | SERIAL DATA LINE MALFUNCTION |
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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