1995 GMC Suburban Emissions Test

1995 GMC SUBURBAN

187,000 MILES • V8 • 4WD • AUTOMATIC

ROMCJR

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I just had my truck inspected and it passed all test except high rpm hydrocarbon.Can you tell me what may cause this?Could it be as simple as a tune-up?I think the reading was 750 or so and max allowed is 300 I think.Thanks for your help.romcjr

Dec 24, 2009 at 4:48 AM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.