Enclave FWD V6-3.6L (2008)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
A/T Controls - Flat Spot At 35-50 MPH
TECHNICAL
Bulletin No.: 08-07-30-022A
Date: August 01, 2008
Subject:
Hesitation or Flat Spot Between 56-80 km/h (35-50 mph) (Reprogram Transmission Control Module)
Models:
2008 Buick Enclave
2007-2008 GMC Acadia
2007-2008 Saturn OUTLOOK
with FWD or AWD
Supercede:
This bulletin is being revised to correct the formatting of the table for the paper version of this bulletin. The electronic version in SI was correctly
formatted. Please discard Corporate Bulletin Number 08-07-30-022 (Section 07 - Transmission/Transaxle).
Condition
Some customers may comment on a flat spot or hesitation between 56-80 km/h (35-50 mph) speed range.
Cause
The existing transmission calibration is programmed to maximize fuel economy and requires a greater throttle input than some customers would prefer to
provide acceleration in this speed range.
Correction
A new calibration is available. This new calibration increases the speed required to obtain upshifts and removes TCC apply from 2nd to 3rd gear, thereby
reducing engine lugging and improving vehicle response to accelerator input.
Important:
This calibration will have a negative impact on fuel economy of 0-1.2 L/100 km (0-2 mpg) combined driving.
To obtain this calibration, contact Techline (TCSC). Techline will reconfigure the vehicle to make this calibration the default calibration for this vehicle.
The table above shows the Shift Pattern Change at Light Throttle.
Warranty Information
For vehicles repaired under warranty, use the table above.
