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 MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 83 (BODY CONTROL MODULES)DIAGNOSTIC TESTSDTC U1301: CLASS 2 DATA LINK HIGHCONDITIONS FOR RUNNING DTCS
1998 Chevrolet Suburban K2500, 7.4 J, Part Time
Conditions For Running DTCs
1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Conditions For Running DTCs
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 GMC Savana, 2002 Chevrolet Chevy Express, 2001 GMC Savana Special, 2001 GMC Savana Camper Special, and 2001 GMC Savana. However, it is still accessible from the selected car via links, so may be relevant.
- Voltage supplied to module is in normal operating voltage range (about 9 to 16 volts).
- Vehicle power mode (ignition switch position) requires serial data communication to occur.
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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.