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When to Check and Change Automatic Transmission Fluid
It is usually not necessary to check the transmission fluid level. The only reason for fluid loss is a transmission leak or overheated transmission. If a small leak is suspected, then use the followi ...

Vehicle Overview
GMC has redesigned its full-size rear-wheel-drive (RWD) vans for the first time in seven years. The 2003 Savanas get upgraded powertrains, fresh features and an updated appearance. Three industry ...

Powertrain details
The GMC Sierra All Terrain HD concept is propelled by the new, production 6.6L Duramax turbo-diesel V-8 and Allison 1000 six-speed automatic transmission powertrain combination offered in the 2011 ...