Transmission Has a Harsh 1-2 Shift, Slipping 1-2 Shift Followed by a Harsh Engagement (Replace Pressure Control Solenoid and Reprogram PCM on Certain Models)
| Subject: | Transmission Has a Harsh 1-2 Shift, Slipping 1-2 Shift Followed by a Harsh Engagement (Replace Pressure Control Solenoid and Reprogram PCM on Certain Models) |
| Models: | 2003 Cadillac Escalade |
| 2003 Chevrolet Avalanche, Silverado, Suburban, Tahoe |
| 2003 GMC Sierra, Yukon, Yukon XL |
| with 4.8L or 5.3L V8 Engine and 4L60-E Automatic Transmission (RPO M30) |
This bulletin is being revised to replace labor code K5364 with labor code J6355. Please discard Corporate Bulletin Number 03-07-30-020D (Section 07 -- Transmission/Transaxle).
Condition
Some customers may comment on a harsh 1-2 shift, 1-2 slip shift that has a bump feeling when 2nd gear engages.
Correction
For 2003 model year vehicles produced prior to April 1, 2003, replace the Pressure Control Solenoid (PCS). Refer to the Control and Shift Solenoid Replacement procedure in the Transmission sub-section of the Service Manual (SI Document ID #825149). Also, reprogram the Powertrain Control Module (PCM).
For 2003 model year vehicles produced on or after April 1, 2003, reprogram the Powertrain Control Module (PCM).
Parts Information
Part Number | Description |
|---|---|
24230632 | Solenoid, pressure Control |
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
FOR 2003 MODEL YEAR VEHICLES PRODUCED PRIOR TO APRIL 1, 2003:
Labor Operation | Description | Labor Time |
|---|---|---|
K6353 | Solenoid, Pressure Control - Replace | Use published labor operation time |
Add: | To Reprogram the Transmission Control Module | 0.4 hr |
FOR 2003 MODEL YEAR VEHICLES PRODUCED ON OR AFTER APRIL 1, 2003:
Labor Operation | Description | Labor Time |
|---|---|---|
J6355 | Module, Powertrain Control - Transmission Reprogramming | 0.4 hr |
