Engine Controls - Revised Chart C8, TCC Operation

89pontiac17

Bulletin Number: 89-6-55

Reference Number: 976502

Publish Date: 6/89
Subject: SERVICE MANUAL UPDATE SECTION 6E3-C8-10 DRIVEABILITY EMISSIONS


Models TCC OPERATION
Affected: 1989 GRAND PRIX 3.1L (VIN T), 440T4
On page 6E3-C8-10 of the 1989 Grand Prix Service Manual is the following statement:

"The TCC will engage on a warm engine under given road load in 2nd, 3rd, and 4th gears."

It should read as follows:

"The TCC will engage on a warm engine under given road load in 3rd and 4th gear."

Calibration for the 3.1L engine with a 440-T4/Hydramatic 4T60 transaxle does not engage the TCC in second gear.

Please make this correction in your 1989 Grand Prix Service Manual.