General Motors is recalling over 20,000 2004-'11 Saab 9-3 convertibles to fix a seatbelt issue.

GM said that the automatic tensioning system cable in the driver's side front seatbelt retractor could break.

The automaker is not unaware of any crashes, injuries or fatalities linked to the recall.

"If the cable were to break, seatbelt webbing spooled out by the driver would not retract," GM said in a statement. "The convertibles and sedans were investigated at the same time, but the convertible parts were not identical to the sedan parts.

Dealers are being instructed to replace the driver's side retractor in the recalled vehicles.

Necessary repairs will be made free of charge.

"GM has since learned of customer complaints to the NHTSA for the convertibles." GM said regarding the issue.

GM has issued a "special coverage," which means that if the same repair is needed on the passenger-side retractor, it will be covered for the life of the vehicle.

The automaker has also extended the special coverage for passenger-side seatbelt retractors on the 2004 Saab 9-3 vehicles from the original 10-year coverage to the life of the sedan.

Approximately 28,789 vehicles are involved in the recall, according to the automaker.

The recall is part of a larger GM recall of four vehicles announced by the automaker on June 13.

The larger recall involves 581,367 vehicles.

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