2 recalls across 2 model years
The GMC Topkick C8500 has 2 recalls affecting specific model years, with the most serious being an engine governor failure on 1990 models equipped with the Caterpillar 3116 engine, where the governor can lose the ability to limit engine speed and allow dangerous over-revving at highway speeds.
On 2003 models equipped with the optional Caterpillar diesel engine, a battery cable routed too close to the exhaust pipe can have its protective conduit and insulation degraded by heat, exposing bare copper wire and creating a risk of electrical short or fire.
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