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Service bulletin CAMP/93C56

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id37959
Published by NHTSA1995-02-09
Manufacturer's numberCAMP/93C56
Manufacturer's date1994-12-01
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION

NHTSA's summary

GENERAL MOTORS HAS DETERMINED THAT CERTAIN 1993 M/L AND G VANS EQUIPPED WITH CRUISE CONTROL MAY EXPERIENCE A CONDITION AT TEMPERATURES BELOW 32 DEGREES FAHRENHEIT, WHERE THE TRANSMISSION WILL NOT SHIFT OUT OF PARK WITH THE BRAKE PEDAL DEPRESSED. TO PREVENT THIS CONDITION FROM OCCURRING, DEALERS ARE TO REPLACE THE CRUISE CONTROL VACUUM RELEASE VALVE, AND CHECK AND ADJUST THE BTSI SOLENOID CABLE AS NEEDED. *TW

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Transmission and driveline, Automatic transmission

Vehicles listed
CHEVROLET ASTRO1993
CHEVROLET G SERIES1993

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
5771031995-11-01. Service bulletin. TRANSMISSION LEAK AT REAR EXTENTION HOUSING AND PROP SHAFT. *TW
RCL/93C56A1995-02-28. Service bulletin. GENERAL MOTORS HAS DETERMINED THAT CERTAIN 1993 M/L AND G VANS MAY EXPERIENCE A CONDITION, AT TEMPERATURES BELOW 32 DEGREES FAHRENHEIT, WHERE THE TRANSMISSION WILL NOT SHIFT OUT OF PARK WITH THE BRAKE PEDAL DEPRESSED. TO PREVENT THIS CONDITION FORM OCCURRING, DEALERS WILL REPLACE THE CRUISE CONTROL VACUUM RELEASE VALVE AND CHECK AND ADJUST THE BTSI SOLENOID CABLE. *TW
4671081995-02-08. Service bulletin. TRANSMISSION EXTENTION SEAL LEAKS. *TW
CAMP/93C561995-01-10. Service bulletin. MANUFACTURER RECALL - GENERAL MOTORS HAS DETERMINED THAT CERTAIN 1993 M/L AND G VANS MAY EXPERIENCE A CONDITION AT TEMPERATURES BELOW 32 DEGREES FAHRENHEIT WHERE THE TRANSMISSION WILL NOT SHIFT OUT OF PARK WITH THE BRAKE PEDAL DEPRESSED TO PREVENT THIS CONDITIONFROM OCCURRING, DEALERS WILL REPLACE THE CRUISE CONTROL VACUUM RELEASE VALVE AND CHECK AND ADJUST THE BTSI SOLENOID CABLE AS NEEDED. *TW