ACDelco GM Original Equipment 10-5073 Power Steering Fluid

This mineral-oil-based power steering fluid is manufactured by ExxonMobil (Mobil Power Steering Fluid IMP-7555) and sold under ACDelco branding with GM part numbers 10-5073 and 19329448. It is the fluid GM specifies for hydraulic-assist systems across Buick, Cadillac, Chevrolet, GMC, Pontiac, Oldsmobile, and Saturn vehicles. The formula is rated to a -42 C pour point for cold-climate operation and contains no stop-leak or seal conditioner additive. Community evidence on BobIsTheOilGuy and in high-volume owner feedback consistently confirms it as the correct clear fluid for GM hydraulic power steering systems, with no documented seal compatibility failures and no reformulation signals.

Best for owners of GM vehicles (Buick, Cadillac, Chevrolet, GMC) with hydraulic power steering systems where the owner's manual or reservoir cap specifies GM OEM power steering fluid. The part number match removes compatibility guesswork entirely. Skip if your GM vehicle has electric power steering (EPS): EPS systems do not use hydraulic fluid of any kind. Skip for European vehicles requiring Pentosin CHF 11S or Japanese vehicles requiring a brand-specific fluid such as Honda PSF: this product is not formulated or approved for those platforms.

The SDS carries no GHS hazard classification at mixture level: no signal word, no H-codes. A California Prop 65 warning applies based on a petroleum-distillate base-oil component. Skin protection is situational for extended flush operations; normal reservoir top-off presents low contact risk. Old power steering fluid is drain-destined: collect it during a flush and bring it to an automotive retailer or used-oil recycling center for proper disposal.