The 1998 Chevrolet Silverado 1500’s power steering system typically uses Dexron II or Dexron II-D automatic transmission fluid (ATF) in the reservoir, with Dexron III ATF as an acceptable alternative if Dexron II isn’t available. Do not use Type F or fluids not approved for GM power steering.
Fluid types and compatibility
Understanding which fluids are approved helps prevent steering problems and damage.
Compatibility notes you should know:
- Dexron II or Dexron II-D ATF (the most common specification for 1990s GM power steering systems).
- Dexron III ATF can be used if Dexron II is not available, but confirm no newer specification is required for your exact vehicle configuration.
- A GM-approved ATF labeled for automatic transmission or specifically for GM power steering is acceptable; avoid non-GM ATFs not rated for GM steering systems.
Concluding: When in doubt, check your owner's manual or a GM service bulletin for the exact recommendation for your engine and transmission pairing, but these are the standard options for the 1998 model year.
How to check and refill
Follow these steps to safely check, refill, and bleed the power steering system.
- Park on level ground, engine off, and locate the power steering reservoir cap under the hood; wipe the cap area clean before opening.
- Check the fluid level on the reservoir dipper or gauge; it should fall between the "MIN" and "MAX" marks when cold.
- If low, add the recommended ATF (Dexron II/II-D or Dexron III) slowly, with the engine off, to bring the level up to the proper mark.
- Replace the cap, start the engine, and turn the steering wheel from lock to lock several times to bleed air from the system; repeat as needed until the level remains steady.
- With the engine off, recheck the fluid level and top up if necessary; avoid overfilling, which can damage the system.
- Inspect for leaks and monitor steering feel; if you notice unusual noises, stiffness, or foaming fluid, have the system inspected and flushed if required.
Concluding: Properly maintaining the power steering fluid helps ensure smooth steering and prolongs the life of the steering components.
Summary
In short, a 1998 Chevrolet Silverado 1500 typically uses Dexron II or Dexron II-D ATF in its power steering reservoir, with Dexron III ATF as an acceptable alternative. Ensure you use a GM-approved or ATF labeled for GM power steering, avoid Type F, and follow proper checking and bleeding procedures when servicing the system. Always consult the owner’s manual or a GM-certified technician for the exact specification for your particular truck configuration.