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1995 Chevrolet K2500 Cheyenne 6.5L Excessive Emissions, Hesitation, MIL Lamp on
Posted to GM Driveability on 12/11/2005 4 Replies

This is my truck and it suddenly started belching out a lot of black smoke on acceleration. Mil was on and recovered codes 33, 99.I have vacuum at the EGR all the time and it is opening the EGR when it should not. I think that it should vent the vacuum untill ...

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Message Closed w/FIX

car Vehicle Data

1995 Chevrolet K2500 Cheyenne

VIN 1GCFC24F1S
Engine6.5 L / 8 cyl / DIESEL
Trans4-speed Automatic (Electronic)
DeliveryFI / diesel
EmissionsNot OBD-II Compliant
SymptomsExcessive Emissions, Hesitation, MIL Lamp On
OccursAlways
Misc.Pick Up

Trouble Codes

33EGR Controll pressure/ Barosensor circut Highlow vacuum
99pedal position 2 / 5volt ref. fault.
Message Closed w/FIX

car Vehicle Data

1995 Chevrolet K2500 Cheyenne

VIN 1GCFC24F1S
Engine6.5 L / 8 cyl / DIESEL
Trans4-speed Automatic (Electronic)
DeliveryFI / diesel
EmissionsNot OBD-II Compliant
SymptomsExcessive Emissions, Hesitation, MIL Lamp On
OccursAlways
Misc.Pick Up

Trouble Codes

33EGR Controll pressure/ Barosensor circut Highlow vacuum
99pedal position 2 / 5volt ref. fault.