GMC Savana Van Transmission Problems in Sacramento

The 2024 GMC Savana, and previous model years of the van, is offered in several configurations, including the GMC Savana Cargo, the GMC Savana Passenger and the GMC Savana Cutaway, each of which is designed to serve a specific purpose. Previously, the 8-speed automatic transmission tagged with RPO code M5U was paired with the naturally aspirated 4.3L V6 LV1 gasoline engine rated at 276 horsepower at 5,200 rpm and 298 pound-feet of torque at 3,900 rpm.

The LV1 engine is standard in all GMC Savana Passenger and Cargo configurations as well as in the GMC Savana 3500 Cutaway with the 139-inch wheelbase. The M5U transmission for this engine will now be replaced with the 8-speed automatic transmission tagged with RPO code MTH in the 2024 GMC Savana.

The Chevy Express and GMC Savana, are being investigated by the NHTSA in response to five alleged transmission failures. The investigation is looking specifically at cutaway Chevy Express and GMC Savana models equipped with the GM Hydra-Matic 6L90 MYD transmission, a six-speed, fuel-saving, electronically controlled automatic transmission for RWD and AWD.

Transmissions

GMT600

4-speed automatic 4L60-E (1500 and light-duty 2500 series)

4-speed automatic 4L80-E (heavy-duty 2500 and 3500 series)

GMT610

4-speed automatic 4L60-E on 1500 and light-duty 2500 (2003–2014)

4-speed automatic 4L80-E on heavy-duty 2500 and 3500 (2003–2009)

6-speed automatic 6L90-E on heavy-duty 2500 and 3500 (2010–2023)

8-speed automatic 8L90-E on 2.8L Duramax and 4.3L Ecotec3 V6 engines (2017–present), 6.6L V8 (2024)