GMC · Canada · Crit
GMC Topkick C6, Topkick C7: Fuel System
Affects GMC Topkick C6, Topkick C7 · 1985 — about 134 vehicles.
The hazard
On certain vehicles, fuel return hoses improperly connected between the switching valve and the fuel tank sending units may cause overflow and leakage of fuel,creating the possibility of a fire.
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