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 MANUALSCHEVROLET1999CUTAWAY 7.4 JREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM - TESTS W/CODES - DTC P1273-P1536DTC P1381DTC P1381: MISFIRE DETECTED-NO EBTCM/PCM SRI DATA (3.5L "W" BODY)DIAGNOSTIC PROCEDURES
1999 Chevrolet Cutaway 7.4 J
Diagnostic Procedures
1999 Chevrolet Cutaway 7.4 JSECTION Diagnostic Procedures
- Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS INTRODUCTION article. After performing OBD system check, go to next step.
- Using scan tool, select CHASSIS DIAGNOSTICS. Attempt to display ABS data on scan tool. If ABS data can be displayed, go to next step. If ABS data cannot be displayed, diagnose ABS system. See appropriate ANTI-LOCK article in BRAKES.
- Check serial data circuit for open or poor connection between PCM and EBTCM. Repair as necessary. If circuit or connection is okay, fault is intermittent. See DIAGNOSTIC AIDS .
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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.