Suburban 1/2 Ton 2WD V8-5.3L VIN T (2004)
Valve Body: All Technical Service Bulletins
A/T - Harsh Light Throttle 1-2 Shift
TECHNICAL
Bulletin No.: 09-07-30-017A
Date: May 20, 2010
Subject: Harsh 1-2 Shift at Light Throttle (Install New 1-2 Accumulator Valve Kit)
Models:
2003-2007 Cadillac Escalade
2003-2007 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2003-2007 GMC Sierra, Yukon, Yukon XL
All Equipped with 4.8L or 5.3L Engine (RPOs LR4, LM7, L59, LM4, LH6, L33)
and 4L60E Automatic Transmission (RPO M30)
Please Refer to GMVIS
Supercede:
This bulletin is being revised to update the Warranty Information. Please discard Corporate Bulletin Number 09-07-30-017 (Section 07 -
Transmission/Transaxle).
Condition
Some customers may comment about a harsh 1-2 shift at light throttle.
Cause
This condition may be caused by the 2-4 band apply time extending through the 1-2 accumulator stroke.
Correction
1. Verify the customer's concern.
2. Remove the valve body. Refer to Valve Body and Pressure Switch Removal in SI.
3. Remove the coiled spring pin (360).
4. Remove the 1-2 accumulator valve sleeve (372).
5. Remove the 1-2 accumulator valve (371) and the 1-2 accumulator valve spring (370).
6. Install the new 1-2 accumulator valve kit, GM P/N 24255821.
7. Install the valve body. Refer to Valve Body and Pressure Switch Installation in SI.
Parts Information
Warranty Information
For vehicles repaired under warranty, use the table above.
