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In the 2003 GMC Sierra, it is recommended to use Prestone power steering fluid. It is advisable to change the power steering fluid every 75,000 miles. When changing fluids, be attentive to any noises from the steering components. A defective bearing can create an unpleasant noise, while a loose bearing can be bothersome to the ear. Effective steering is crucial for maneuvering on the road and changing lanes. Despite this, issues may arise over time. The steering wheel could get stuck, veer to one side, or experience fluid leaks. A loose steering pump could lead to vehicle troubles. Additionally, problems may arise with the strut bearings or rack mount.
The power steering fluid for a 2003 GMC Sierra is dexron iii.