A/T - Specification Chart Update
File In Section: 7 - TransmissionBulletin No.: 87-71-60
Date: March, 1998
SERVICE MANUAL UPDATE
Subject:
Section 7 - Automatic Transmission Revised Charts (General Specification Section)
Models:
1998 Chevrolet and GMC C/K Models
with HYDRA-MATIC 4L8OE Transmission (RPO MT1)
This bulletin updates the 1998 C/K Truck automatic transmission 4L80E general specification section.
The shift speed chart and the range signal chart were omitted from the Service Manual. The 1-2 Shift solenoid valve state is corrected to indicate "ON" on the overdrive range fourth gear chart. Make a note of the listed changes in your Service Manual.