Recalls 1 and 2 describe the same underlying defect (chrome-plated aluminum wheels with incorrectly machined mounting surfaces causing wheel stud failure). I'll treat them as one issue.
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The 1999 Pontiac Bonneville has 3 recalls, the most serious being a wheel defect on vehicles equipped with chrome-plated aluminum wheels where the wheel studs can break and the entire tire and wheel assembly can separate from the car while driving.
On vehicles with the 4T65E automatic transmission, a link in the shift mechanism can disconnect and cause the gear indicator on the dashboard to show a different gear than the transmission is actually in. This means the driver may believe the car is in park when it is not, raising the risk of unexpected vehicle movement.
At a glance
What can fail
A retaining clip that holds the manual valve to the transmission shift linkage can loosen during certain shifting movements, causing the linkage to disconnect from the valve.
What the fix does
Dealers will replace the manual valve and linkage assembly with a new kit that uses a spring-type fastener.
Summarized — see the official notice for exact wording, dates, and contacts.
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At a glance
What can fail
Some chrome aluminum wheels have a mounting surface that wasn't machined properly, which can cause wheel studs to break and the tire and wheel to separate from the vehicle.
What the fix does
Dealers will inspect your wheels and replace any with suspect date codes. They will also replace the wheel mounting studs where suspect wheels were installed.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
Some chrome-plated aluminum wheels have a mounting surface that wasn't machined properly, which can cause the wheel studs to break.
What the fix does
Dealers will inspect your wheels and replace any with suspect date codes. They'll also replace the mounting studs where those wheels were installed.
Summarized — see the official notice for exact wording, dates, and contacts.
