Door lock spring - The internal door lock mechanism has a small oversprung spring, which helps locate the lock lever, and provides a positive feel to the lock and unlock position. These springs snap from fatigue, which results in sloppy lock actuation. When these springs snap, the door can be opened from the lock position when the outside handle is manipulated. These springs are not available on their own, which usually means a second hand mechanism is required.
Indicator cancellation - Indicator cancellation is left up to 2 small springs located behind the steering wheel and mounted to the indicator switch mechanism. These springs do break, and are relatively easy to change once the steering wheel has been removed.
Speedometer - The main downfall of commodore speedometer assemblies is the odometer, they usually stop working. The main odometer drive cog is cast alloy, and is pressed onto a hardened steel shaft, that also supports the numbered odometer cogs. The cast alloy drive cog wears and no longer grips the steel shaft, and then the numbered cogs stop turning.
Seat belts - Seatbelt fray is common in any aging car, and is illegal and unsafe. New seat belts are available for auto parts stores. Seat belt stalk buttons can fail and not properly lock when the belt buckle is inserted. In either situation, the seat belt unit should be changed to ensure occupant safety. The seat belts should also be changed if the vehicle has ever been in an accident, because the seat belt material stretches to absorb inertia.
Steering wheel - Steering wheel padding is molded around a round metal bar, and after a lot of use the padding rotates freely around the bar. This is defectable, as it compromises grip. Steering wheels are designed specifically to collapse with the steering column during an accident. For this reason sports steering wheels are illegal in most states, unless used with a certified boss.
Ignition barrel - Ignition barrels and keys wear, and eventually the barrel can be turned without the key. This doesn't leave much in the way of security. New ignition barrels are readily available and require the steering wheel to be re moved for installation.
Ignition Return Spring - The ignition barrel moves a rod in the ignition switch, which is located approximately a 1/3 of the way down the steering column. When the barrel is turned to crank position, the rod extends completely to engage the starter motor. The ignition switch itself is designed to return from the crank position on its own, but can weaken with age! To assist its return, a metal tab is bolted to the ignition switch. These metal tabs snap off, and with the combination of worn switch and broken tab, the ignition barrel may not return from the crank position effectively.
Preload Spring - Part number 7804410
Cracked drivers seat floor - It is very common to see and hear cracked seat mountings, where the drivers seat bolts to the floor. This is not good, as the seat is able to move beyond acceptable safe limits. GMH have recognised this as a design fault, and will rectify one seat per car free of charge! In odd occasions the left seat mounting points crack, but in most cases, the drivers seat is worse affected.