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 MANUALSCHEVROLET1993SPORTVAN G30, VAN PASSENGER, 7.4 NREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 23 (ENGINE CONTROLS - TESTS W/CODES - 6.5L DIESEL)DTC 32 - EGR CIRCUIT ERRORDIAGNOSTIC AIDS

1993 Chevrolet Sportvan G30, Van Passenger, 7.4 N

Diagnostic Aids

1993 Chevrolet Sportvan G30, Van Passenger, 7.4 NSECTION Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1994 GMC Yukon, 1994 GMC Suburban, 1994 GMC Pickup, 1994 GMC Cab & Chassis, and 1994 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.

A vacuum leak or a pinched vacuum line may cause DTC 32 to set. Check all vacuum hoses and components connected to vacuum hoses for leaks or sharp bends. Check the vacuum source to the EGR solenoid. Also check for small leak in EGR valve.

Fig 1: DTC 32 Schematic ("C" & "K" Series) EGR Circuit Error

RENDER: 1.0x

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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.