Dorman 555-030.1 Expansion Plug
Confirm Fitment Before You Buy
Not sure it fits? Message Year/Make/Model/Engine (2WD/4WD if applicable) and we’ll help confirm compatibility.
Why buy from Koskowski Automotive?
• 50+ years (since 1972) • Dorman Authorized Seller • Fast shipping • Easy returns
Regular price
$10.00
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Vehicle Fitment: Use the table below to match your exact configuration. If you don’t see your exact setup, message us before ordering.
Product Description
This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
- Direct replacement - this engine expansion plug matches the fit and function of the factory part on specified years, makes and models
- Ideal solution - this plug is a reliable replacement for an original part that is missing or has failed due to fatigue
- Durable construction - this part is made from quality materials to ensure reliable performance and long service life
- Trustworthy quality - backed by team of product experts in the United States and more than a century of automotive experience
Detailed Applications
| Year | Make | Model | Configuration | Positions | Application Notes |
|---|---|---|---|---|---|
| 2005 | Chevrolet | Astro | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2005 | Chevrolet | Blazer | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2005 | Chevrolet | Express 1500 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2005 | Chevrolet | Express 2500 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2005 | Chevrolet | Silverado 1500 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2005 | GMC | Safari | As Req; 1.625 In.; Steel | ||
| 2005 | GMC | Savana 1500 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2005 | GMC | Savana 2500 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2005 | GMC | Sierra 1500 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2004 | Chevrolet | Astro | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2004 | Chevrolet | Blazer | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2004 | Chevrolet | Express 1500 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2004 | Chevrolet | Express 2500 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2004 | Chevrolet | S10 | As Req; 1.625 In.; Steel | ||
| 2004 | Chevrolet | Silverado 1500 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2004 | GMC | Safari | As Req; 1.625 In.; Steel | ||
| 2004 | GMC | Savana 1500 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2004 | GMC | Savana 2500 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2004 | GMC | Sierra 1500 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2004 | GMC | Sonoma | As Req; 1.625 In.; Steel | ||
| 2003 | Chevrolet | Astro | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2003 | Chevrolet | Blazer | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2003 | Chevrolet | Express 1500 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2003 | Chevrolet | Express 2500 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2003 | Chevrolet | S10 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2003 | Chevrolet | Silverado 1500 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2003 | Chevrolet | W3500 Tiltmaster | V8 350 5.7L | As Req; 1.625 In.; Steel | |
| 2003 | Chevrolet | W4500 Tiltmaster | V8 350 5.7L | As Req; 1.625 In.; Steel | |
| 2003 | GMC | Safari | As Req; 1.625 In.; Steel | ||
| 2003 | GMC | Savana 1500 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2003 | GMC | Savana 2500 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2003 | GMC | Sierra 1500 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2003 | GMC | Sonoma | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2003 | GMC | W3500 Forward | V8 350 5.7L | As Req; 1.625 In.; Steel | |
| 2003 | GMC | W4500 Forward | V8 350 5.7L | As Req; 1.625 In.; Steel | |
| 2003 | Isuzu | NPR | As Req; 1.625 In.; Steel | ||
| 2003 | Isuzu | NPR-HD | As Req; 1.625 In.; Steel | ||
| 2003 | Workhorse | FasTrack FT1061 | V8 350 5.7L | As Req; 1.625 In.; Steel | |
| 2003 | Workhorse | FasTrack FT1261 | V8 350 5.7L | As Req; 1.625 In.; Steel | |
| 2003 | Workhorse | FasTrack FT1461 | V8 350 5.7L | As Req; 1.625 In.; Steel | |
| 2003 | Workhorse | FasTrack FT1601 | V8 350 5.7L | As Req; 1.625 In.; Steel | |
| 2003 | Workhorse | FasTrack FT1801 | V8 350 5.7L | As Req; 1.625 In.; Steel | |
| 2003 | Workhorse | FasTrack FT1801 | V8 395 6.5L | As Req; 1.625 In.; Steel | |
| 2003 | Workhorse | FasTrack FT1802 | V8 350 5.7L | As Req; 1.625 In.; Steel | |
| 2003 | Workhorse | FasTrack FT1802 | V8 395 6.5L | As Req; 1.625 In.; Steel | |
| 2003 | Workhorse | FasTrack FT931 | V6 262 4.3L | As Req; 1.625 In.; Steel | |
| 2003 | Workhorse | P30 | V8 350 5.7L | As Req; 1.625 In.; Steel | |
| 2003 | Workhorse | P32 | V8 395 6.5L | As Req; 1.625 In.; Steel | |
| 2003 | Workhorse | P42 | V8 395 6.5L | As Req; 1.625 In.; Steel | |
| 2003 | Workhorse Custom Chassis | P42 | V8 350 5.7L; GAS | 1.625 In. Steel Cup; 8 Required in Block |
Product Specifications
| Describe Type: | Cup Type |
|---|---|
| Material: | Steel |
| Maximum Diameter: | 1.643 in |
| Minimum Diameter: | 1.63 in |
| Package Contents: | Expansion Plug |
| Packaging Type: | Bag |
| Package Quantity: | 1 |
| Brand: | Dorman - AutoGrade - Bagged |
OE Numbers
| DIRECT OE CROSS | |
|---|---|
| 2121198 | CHRYSLER |
| 3144643 | AMERICAN MOTORS |
| 3826504 | GENERAL MOTORS |
| 3826505 | GENERAL MOTORS |
| 5203342 | CHRYSLER |
| 6033564 | CHRYSLER |
| 70128 | NAVISTAR |
| 733598 | AMERICAN MOTORS |
| 88891749 | GENERAL MOTORS |
| 94673017 | GENERAL MOTORS |
| J3144643 | CHRYSLER |