GMC · Canada · Crit
GMC Sierra: Electrical
Affects GMC Sierra · 2007–2011 — about 2K vehicles.
The hazard
On certain vehicles equipped with an optional dual batteries, the owner's manual does not specify a maximum amperage rating for the auxiliary battery to the trailer wiring harness. If the circuit is overloaded, a fusible link may fail and could damage adjacent components, potentially resulting in a fire and increasing the risk of injury and/or damage to property. Correction: Dealers will install an 40 amp inline fuse and provide an owner's manual supplement containing maximum amp rating information. Note: Owners are advised not to use equipment that exceeds a 40 amp draw on the auxiliary battery trailer wiring.
What to do
Contact your dealer; the remedy details were not included in the filing.