PROM - M/T Launch/Improved Throttle Response/Idle Speed
Group Ref.: EngineBulletin No.: 376402A
Date: February, 1994
SUBJECT:
INCREASED IDLE SPEED AND THROTTLE CALIBRATION OF 6.5L (L65) TURBOCHARGED DIESEL ENGINE TO IMPROVE MANUAL TRANSMISSION LAUNCH AND ADDRESS LOW POWER COMPLAINTS (INSTALL REVISED PROM)
MODELS:
1994 CHEVROLET AND GMC C/K TRUCKS WITH 6.5L (L65) DIESEL ENGINE (INJECTION PUMP PART NUMBER 10225929 ONLY) AND MANUAL TRANSMISSION (MT8)
THIS BULLETIN IS BEING REVISED TO CORRECT THE LABOR TIME. PLEASE DISCARD BULLETIN 376402.
CONDITION:
Some owners may comment on one or both of the following conditions:
- Stall on launch as clutch pedal is released
- Poor throttle response (low power)
CORRECTION:
Scan PROM ID and update PROM as described below, if required. The revised PROM will increase the base idle speed to 700 RPM, and provide an improved throttle calibration. If the updated PROM does not correct the customer complaint, refer to the diagnostic and service procedures provided in the service manual or Driveability, Emissions, and Electrical Diagnosis manual.
PART INFORMATION:
NOTE:
This PROM revision is for vehicles equipped with injection pump part number 10225929 ONLY.
Parts are currently available from GMSPO.
WARRANTY INFORMATION:
For vehicles repaired under warranty, use:
Labor Operation: T0500 PROM, Replace (includes diagnosis and remove PCM)
Labor Time: 0.6 Hr.