How do i fix the timing on my 93' Buick Roadmaster?

To fix the timing on your 1993 Buick Roadmaster, first, ensure the engine is at top dead center (TDC) on the compression stroke for cylinder one. Then, check the timing marks on the harmonic balancer and the timing cover to determine if adjustments are necessary. Use a timing light to check the current timing and adjust it by loosening the distributor hold-down bolt and rotating the distributor until the timing light indicates the desired setting. Finally, retighten the distributor bolt and recheck the timing to ensure it's correct.