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 VARIANT/TRIMSECTION 3 (ENGINE CONTROLS - SERVICE & ADJUSTMENT SYSTEM SPECIFICATIONS - 5.0L)FUEL SYSTEMIDLE SPEED & MIXTURE
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 F
Idle Speed & Mixture
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 FSECTION Idle Speed & Mixture
WARNING: This page is about a different variant/trim than selected.
NOTE:
Idle mixture on fuel injected models is controlled by control module and is not adjustable. Controlled idle speed and IAC count can be checked using scan tool. See CONTROLLED IDLE SPEED & IAC COUNT table. For controlled idle speed adjustment procedures, see the ADJUSTMENTS - 5.0L
article.
CONTROLLED IDLE SPEED & IAC COUNT
| Application | Idle RPM | (1) IAC Counts | ||||||
|---|---|---|---|---|---|---|---|---|
| Auto. Trans. (2) | 675-725 | Varies | ||||||
| Man. Trans. (3) | 675-725 | Varies | ||||||
|
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RENDER: 1.0x
NO RELATED
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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.