Yukon 2WD V8-5.3L VIN T (2006)
Wiring Harness: All Technical Service Bulletins
A/T - MIL ON/DTC P0894/Harsh 1-2 Shift
Bulletin No.: 06-07-30-007A
Date: February 20, 2007
TECHNICAL
Subject:
Malfunction Indicator Lamp (MIL) On, Diagnostic Trouble Code (DTC) P0894, Harsh 1-2 Shift with 4L60-E, 4L65-E, 4L70-E Automatic Transmission
(Test and Replace Torque Converter Clutch (TCC) Enable Solenoid/Harness, Auto Trans Wiring)
Models:
2006 Cadillac Escalade Models
2006 Chevrolet Light Duty Trucks
2006 Chevrolet Express Vans
2006 GMC Light Duty Trucks
2006 GMC Savana Vans
2006 Pontiac GTO
2006 HUMMER H2, H3
2006 Saab 9-7X
with 4L60-E / 4L65-E / 4L70-E (RPOs M30, M32, M70) Automatic Transmission
Supercede:
This bulletin is being revised to add part number for vehicles with Input Speed Sensor (ISS). Please discard Corporate Bulletin Number 06-07-30-007
(Section 07 - Transmission/Transaxle).
Condition
Some customers may comment on a harsh 1-2 shift with the MIL illuminated.
Diagnosis with a scan tool may reveal a DTC P0894.
Cause
This condition may be caused by a leaking TCC enable solenoid. The TCC enable solenoid is part of the automatic transmission wiring harness.
Correction
Follow the diagnosis and repair procedure below for a DTC P0894.
With a scan tool, verify the presence of DTC P0894.
Remove the TCC Enable solenoid / automatic transmission wiring harness. Refer to Torque Converter Clutch Pulse Width Modulation (TCC PWM)
Solenoid, TCC Solenoid, and Wiring Harness in the appropriate SI Document.
