GMC · Canada · Mod
GMC G Series: Engine
Affects GMC G Series · 1981 — about 36 vehicles.
The hazard
On certain vehicles equipped with 4.1 Litre, 2 bbl. L6 engines may have the hose connections to the thermal vacuum switch on the air cleaner assembly reversed. This could affect acceleration performance at cold temperatures.
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