| Subject: | Information on Allison® Transmission Service Repairs - Full Service
of Internal Components |
| Models: | 2001-2007 Chevrolet Silverado (Classic) |
| 2001-2007
GMC Sierra (Classic) |
| with Allison® 1000 Series Automatic Transmission (RPO M74) |
This bulletin is being revised to add model years. Please discard Corporate
Bulletin Number 03-07-30-044B (Section 07 - Transmission/Transaxle).
Full service repairs, including internal repairs, can be made to the Allison®
1000 Series automatic transmission installed in the Silverado and Sierra models.
Service Training
The following training courses are available to assist in diagnosis and repair
of the Allison® automatic transmission.
| • | 10041.00W - SI Overview |
| • | 16048.16W - Tech 2 Familiarization |
| • | 17041.20W-R2 - Automatic Transmission/Transaxle Diagnostics |
| • | 17041.20D1 - Automatic Transmission/Transaxle Diagnostics |
| • | 17041.20D2 - Automatic Transmission/Transaxle Diagnostics |
| • | 17041.20H - Automatic Transmission/Transaxle Diagnostics |
| • | 17340.10V - Allison LCT 1000 Transmission Part 1: Overview and Operation |
| • | 17340.11V - Allison LCT 1000 Transmission Part 2: Diagnosis, Removal
and Installation |
| • | 17340.12D - Allison LCT 1000 Transmission Diagnostic Issues and
Procedures |
| • | 17340.14S - Allison LCT 1000 Transmission Diagnosis and Repair |
| • | 17340.14H-R2 - Allison LCT 1000 Transmission Diagnosis and Repair |
| • | 17340.15V - Allison LCT 1000 Automatic Transmission Updates and
New Features |
| • | 17440.10D - Transmissions: New & Updates |
| • | 18043.01W-R2 - Electrical/Electronics Stage 1 |
| • | 18043.02W-R2 - Electrical/Electronics Stage 2 |
| • | 18043.03W-R2 - Electrical/Electronics Stage 3 |
In Canada, the following training courses are available for the Allison®
automatic transmission.
| • | 17030.01 - Allison LCT1000 Diagnosis (HIDL) |
| • | 17030.24 - Allison LCT1000 Diagnosis and Overhaul (Classroom) |
| • | 57030.00 - Allison LCT1000 Part 1 (Service Know How) |
| • | 57031.00 - Allison LCT1000 Part 2 (Service Know How) |
Special Service Tools
The following special service tools have been shipped to all Chevrolet, GMC
and Canadian dealers.
| • | J 43772 - Pump Seal Installer |
| • | J 43773 - Valve Body Spring Compressor |
| • | J 43799 - Breakout Box Adapter |
| • | J 43909 - Selector Shaft Seal Installer |
| • | J 43911 - Shift Lever Seal Remover |
| • | J 44257 - Connector Removal Tool |
| • | J 44723 - Transmission Holding Fixture |
| • | J 44835-1 - Transmission Cooler Flush Adapters |
| • | J 45056 - Pressure Test Adapter |
| • | J 46409 - Torque Converter Lifting T-Handles |
| • | J 43782 - Output Shaft Seal Installer (used only on 2WD pickups) |
| • | J 43783 - Output Shaft Seal Installer (used only on 2WD Medium
Duty) |
The following special tools have been shipped to all tier 1 and 2 Chevrolet
and GMC dealers and all Canadian dealers.
| • | J 24446 - Rear Bearing Installer |
| • | J 43764 - Converter End Play Fixture |
| • | J 43769 - Spanner Nut Wrench, 4WD |
| • | J 43770 - Main Lube Converter Relief Spring Compressor |
| • | J 43776 - 4-5 Clutch Piston Ring Compressor |
| • | J 43777 - 1-2-3-4 Clutch Piston Ring Compressor |
| • | J 44525 - 1-2-3-4 Clutch Backing Plate Selector Tool |
| • | J 44530 - 3-5-R and 2nd Clutch Piston Spring Compressor |
| • | J 44587 - Mainshaft Holder |
| • | J 46695 - Digital Depth Gauge |
| • | J 44247 - Connector Installer (Wire Harness Connector Installer --
Internal Harness) |
Tech 2®
The Tech 2® will communicate with the Transmission Control Module
(TCM) to read and display transmission DTCs and perform interactive tests. TCM calibrations
are available to Chevrolet and GMC dealers via the GM Techline Information Systems
(TIS).
Cooler Flushing
Important: Refer to Bulletin Number 02-07-30-052D
for information and specifications for the proper use of J 45096 for flow testing.
Automatic transmission oil cooler flush tool, J 45096, should be used
to flush the transmission oil cooler system. A flow check must be made following the
system flush. Refer to Automatic Transmission Oil Cooler Flushing and Flow Test.
Service Information
On-vehicle repairs, service diagnostics and DTC information is available in
Service Information (SI). Overhaul information in available in the Unit Repair section
of SI.
Parts
Parts to repair these transmissions are available from GMSPO. Part numbers should
be obtained from your EPC (Electronic Parts Catalog).
Warranty Information
For vehicles repaired under warranty, use the applicable labor operation found
in the Labor Time Guide.
