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 MANUALSCHEVROLET1997CHEVY EXPRESS G3500, VAN CARGO, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 33 (ENGINE CONTROLS - TESTS W/CODES - 3.8L)TROUBLE CODE CHARTSCODE P0101, MASS AIR FLOW (MAF)DIAGNOSTIC AIDS
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 F
Diagnostic Aids
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 FSECTION Diagnostic Aids
WARNING: This page is about a different car, the 1995 Pontiac Trans Sport, 1995 Oldsmobile Silhouette, and 1995 Chevrolet Lumina APV. However, it is still accessible from the selected car via links, so may be relevant.
An intermittent may be caused by a poor connection, mis-routed harness, rubbed through wire insulation or a wire broken inside insulation. Check for:
- Poor Connection At Control Module Pin Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection.
- Mis-Routed Harness Inspect MAF sensor harness to ensure it is not too close to high voltage wires, such as spark plug wires.
- Damaged Harness Inspect harness for damage. If harness appears okay, observe Tech 1 while moving related connectors and wiring harness. A change in display would indicate intermittent fault location.
- Plugged Air Intake Filter A wide-open throttle acceleration from a stop should cause MAF reading on Tech 1 to range from approximately 4-7 grams per second at idle to 100 or greater at time of 1-2 shift. If not, check for restriction.
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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.