Makes 🢒
GMC_Truck 🢒
2006 🢒
Envoy - 2WD 🢒
Bulletins 🢒
1-2, 2-3, 3-4, 4-5 Shift and Torque Converter Clutch (TCC) Characteristics During Cold Weather Operation on 4L60-E, 4L65-E, 4L70-E, 4L80-E, 4L85-E, 5L40-E, 5L50-E, 6L50, 6L80, 6L90 or Allison Trans.
1-2, 2-3, 3-4, 4-5 Shift and Torque Converter Clutch (TCC) Characteristics During Cold Weather Operation on 4L60-E, 4L65-E, 4L70-E, 4L80-E, 4L85-E, 5L40-E, 5L50-E, 6L50, 6L80, 6L90 or Allison Trans.
Subject: | 1-2, 2-3, 3-4, 4-5 Shift and Torque Converter Clutch (TCC) Characteristics
During Cold Weather Operation on 4L60-E, 4L65-E, 4L70-E, 4L80-E, 4L85-E,
5L40-E, 5L50-E, 6L50, 6L80, 6L90 or Allison® Transmissions |
Models: | 2005-2007 Buick Rainier |
| 2005-2007 Cadillac CTS,
Escalade, Escalade ESV, Escalade EXT, SRX, STS, XLR |
| 2005-2006 Chevrolet TrailBlazer EXT |
| 2005-2007 Chevrolet Corvette, Express, Silverado, Suburban, Tahoe, TrailBlazer,
TrailBlazer SS |
| 2005-2007 GMC Envoy, Envoy Denali, Savana, Sierra, Yukon, Yukon Denali,
Yukon XL, Yukon Denali XL |
| 2006-2007 Pontiac Solstice |
| with Automatic Transmission |
This bulletin is being revised to add models and applicable transmissions. Please
discard Corporate Bulletin Number 05-07-30-018 (Section 07 -- Transmission/Transaxle).
On cold days, approximately 32°F (0°C) or colder, the transmission
is designed to shift differently. The transmission uses a warm-up mode shift schedule
until the engine reaches normal operating temperature. While the transmission is in
warm-up mode, it is normal for transmission upshifts to be delayed or held longer.
This feature improves heater performance by giving quicker vehicle warm-ups.