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 MANUALSCHEVROLET2001CHEVY EXPRESS G3500, VAN PASSENGER EXTENDED, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 144 (BODY CONTROL MODULES)SELF-DIAGNOSTIC SYSTEMANTI-LOCK BRAKE DIAGNOSTIC SYSTEM CHECKTEST PROCEDURE
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 F
Test Procedure
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 FSECTION Test Procedure
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
- Connect scan tool to Data Link Connector (DLC). DLC is located below driver side of instrument panel, near steering column. If scan tool powers up, go to next step. If scan tool does not power up, perform TEST A: SCAN TOOL DOES NOT POWER UP under SYSTEM TESTS.
- Turn ignition switch to RUN position. Using scan tool, attempt to communicate with Driver Information Center (DIC), Electronic Brake Control Module (EBCM), Instrument Panel Cluster (IPC), Instrument Panel Module (IPM) and Powertrain Control Module (PCM). If scan tool communicates with DIC, EBCM, IPC, IPM and PCM, go to next step. If scan tool does not communicate with DIC, EBCM, IPC, IPM and PCM, perform TEST B: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS.
- Using scan tool, select DTCs function for DIC, EBCM, IPC, IPM and PCM. If scan tool displays any DTCs, go to next step. If scan tool does not display any DTCs, repair anti-lock brakes by symptom. See appropriate ANTI-LOCK article in BRAKES.
- If scan tool does not display any DTCs which begin with "U", go to next step. If scan tool displays any DTCs which begin with "U", perform TEST B: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS.
- If scan tool does not display DTCs B1000, B1004, B1007, B1009 or B1010, go to next step. If scan tool displays DTCs B1000, B1004, B1007, B1009, or B1010, perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
- If scan tool does not display DTCs B1327, B1513 or B1514, perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .If scan tool displays DTCs B1327, B1513 or B1514, perform appropriate test. See DIAGNOSTIC TESTS in GENERATORS & REGULATORS - AURORA article in ELECTRICAL.
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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.