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DormanPart #: 579-020
Dorman 579-020 Fuel Tank Sending Unit Lock Ring
⚙️ 37 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$14.82Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
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*Free return shipping only qualifies if our fitment verification tool is used.
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✅ In Stock · Ready To Ship
Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Buick, Chevrolet, Oldsmobile, and Pontiac, Cutlass Supreme, Grand Prix, Lumina, Monte Carlo, and Regal
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? Click here for all Fuel Tank Sending Unit Lock Ring options
Dorman 579-020 Fuel Tank Sending Unit Lock Ring
| Brand | Dorman |
| Part Number | 579-020 |
| Material | Metal |
| Inside Diameter | 1.875 |
| Outside Diameter | 4.25 |
| Mounting Hardware Included | No |
| Gasket Or Seal Included | Yes |
| Lock Ring Diameter (In) | 3.625 in |
| Package Contents | 1 fuel pump lock ring |
This part fits 37 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1997 | Oldsmobile | Cutlass Supreme | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1996 | Buick | Regal | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1996 | Chevrolet | Lumina | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1996 | Chevrolet | Monte Carlo | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1996 | Oldsmobile | Cutlass Supreme | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1996 | Pontiac | Grand Prix | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1995 | Buick | Regal | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1995 | Chevrolet | Lumina | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1995 | Chevrolet | Monte Carlo | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1995 | Oldsmobile | Cutlass Supreme | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1995 | Pontiac | Grand Prix | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1994 | Buick | Regal | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1994 | Chevrolet | Lumina | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1994 | Oldsmobile | Cutlass Supreme | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1994 | Pontiac | Grand Prix | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1993 | Buick | Regal | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1993 | Chevrolet | Lumina | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1993 | Oldsmobile | Cutlass Supreme | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1993 | Pontiac | Grand Prix | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1992 | Buick | Regal | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1992 | Chevrolet | Lumina | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1992 | Oldsmobile | Cutlass Supreme | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1992 | Pontiac | Grand Prix | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1991 | Buick | Regal | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1991 | Chevrolet | Lumina | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1991 | Oldsmobile | Cutlass Supreme | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1991 | Pontiac | Grand Prix | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1990 | Buick | Regal | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1990 | Chevrolet | Lumina | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1990 | Oldsmobile | Cutlass Supreme | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1990 | Pontiac | Grand Prix | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1989 | Buick | Regal | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1989 | Oldsmobile | Cutlass Supreme | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1989 | Pontiac | Grand Prix | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1988 | Buick | Regal | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket | ||
| 1988 | Oldsmobile | Cutlass Supreme | 2.8L | V6 | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket |
| 1988 | Pontiac | Grand Prix | N/A | 3.625 In. I.D.; Kit Contains 1 Retainer and 1 Gasket |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
14088124LO20TR4
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.