GM Service Manual Online
For 1990-2009 cars only

Inspect all pipes, hoses, and fittings for leaks at regular intervals. The fittings must be tight. All clips, clamps, and unions supporting the pipes and hoses must be securely in place. Ensure that all hoses and tubes do not contact parts of the vehicle that could chafe or wear the hoses.

Wipe clean any area suspected of leaking. Leaking fluid will then be easily seen. If you find a leak, tighten, repair, or replace nearby fittings and bolts.