The 1999 GMC B7 has two recalls, both involving the automatic transmission: one where a shift cable can pull free of its end fitting and leave the driver unable to select gears, and one where a degraded transmission fluid cooler hose can leak fluid onto the exhaust and start a fire.
On the gear selection issue, if the cable separates, the transmission may shift into an unintended gear or direction without warning, raising the risk of a crash. The fluid leak concern is separate in cause but equally serious: as the cooler hose deteriorates from heat over time, it can weep transmission fluid onto the hot exhaust on the passenger side of the vehicle, creating a fire risk.
At a glance
What can fail
Transmission fluid can leak from the cooler hose on the passenger side after heat damage, potentially dripping onto the exhaust system.
What the fix does
Dealers will install new cooler hoses with heat protection and proper clearance from the exhaust, and inspect and replace the exhaust manifold seal if needed.
Summarized — see the official notice for exact wording, dates, and contacts.
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At a glance
What can fail
The shift cable end rods weren't crimped correctly. Over time, the shift cable can pull out of the rod end, preventing the driver from manually changing gears.
What the fix does
Dealers will install a new shift cable.
Summarized — see the official notice for exact wording, dates, and contacts.
