Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGMC1991S15 JIMMY 2D UTILITY, RWD, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)STEERINGPOWER STEERINGPOWER STEERING PUMPOVERHAULCLEANING & INSPECTION
1991 GMC S15 Jimmy 2D Utility, RWD, Standard
Cleaning & Inspection
1991 GMC S15 Jimmy 2D Utility, RWD, StandardSECTION Cleaning & Inspection
- Clean all pump components in solvent and blow dry. Inspect flow control valve assembly for wear, scoring, burrs or other damage. Inspect seal bore for burrs, nicks or score marks.
- Inspect machined surfaces of body for scratches or burrs. Check "O" ring mating surfaces. Inspect drive shaft for excessive wear.
- Inspect pump ring for roughness. Check thrust plate and pressure plate for scoring and wear. Ensure vanes slide freely but fit snugly into slots. If vanes are loose in slots, replace rotor and/or vanes.
- Clean all pump components in solvent and blow dry. Inspect flow control valve assembly for wear, scoring, burrs or other damage. Inspect seal bore for burrs, nicks or score marks.
- Inspect machined surfaces of body for scratches or burrs. Check "O" ring mating surfaces. Inspect drive shaft for wear.
- Inspect pump ring for roughness. Check thrust plate and pressure plate for scoring and wear. Ensure vanes slide freely but fit snugly into slots. If vanes are loose in slots, replace rotor and/or vanes.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.