GMC · Canada · High
GMC S Series: Powertrain
Affects GMC S Series · 1982–1983 — about 3K vehicles.
The hazard
On certain vehicles, the design of the transmission and the transmission fluid used may not allow sufficient lubrication between the main-shaft and first gear, which spins on the mainshaft when the transmission is in fifth gear. If this occurs, the transmission can lock up causing a loss of vehicle control and possible vehicle crash.
What to do
Contact your dealer; the remedy details were not included in the filing.
Critical — crash/injury risk now
High — injury risk; see remedy
Moderate — fix at next service
Low — minor / informational