Finding a replacement starter for a 2004 Chevy Trailblazer is less about choosing the lowest price and more about matching the engine, model configuration, tooth count, rotation, and original part number. A mismatch can create installation problems or prevent proper cranking.
This guide compares 10 starter options using the supplied fitment details, specifications, prices, ratings, and available review counts. Most options target the 4.2L six-cylinder Trailblazer, while several are intended for later V8 models and should not be treated as universal replacements.
The OEG Parts 10465527 is the strongest all-around match for many 2004 Trailblazer 4.2L applications, with 12V power, 1.6kW output, 11 teeth, clockwise rotation, and a 4.5 rating from 874 reviews. Always confirm your vehicle’s engine and original starter number before ordering.
Quick Product Comparison
| Product | Image | Best For | Check Price |
|---|---|---|---|
| 1. OEG Parts 10465527 Starter |  | 2004 Trailblazer 4.2L fitment | Check Price |
| 2. Unbranded Starter Motor | | Budget 4.2L replacement | Check Price |
| 3. Unbranded 6494N Starter | | Later Trailblazer applications | Check Price |
| 4. Unbranded 6494N V8 Starter | | V8 Trailblazer configurations | Check Price |
| 5. maXpeedingrods 6494N | | Later 5.3L applications | Check Price |
| 6. A-Premium Starter Motor | | 4.2L replacement with guarantee | Check Price |
| 7. Unbranded 6490 Starter | | 4.2L OE-number matching | Check Price |
| 8. Unbranded 6490N Starter | | Budget direct-fit 4.2L option | Check Price |
| 9. Unbranded 10465582 Starter | | 4.2L replacement with testing claim | Check Price |
| 10. Unbranded 89017557 Starter | | Low-cost 4.2L replacement | Check Price |
What to Look for in the Best 2004 Chevy Trailblazer Starter
Verify the engine and model configuration
The 2004 Trailblazer applications in this list primarily use the 4.2L L6 engine. Some products are listed only for later 5.3L V8 Trailblazers or 2006–2008 models, so the vehicle name alone is not enough.
Match the starter specifications
For the 4.2L options, compare the supplied 12V, 1.6kW, 11-tooth, clockwise specifications. The 6494N products generally list 1.1kW and nine teeth for later V8 applications.
Compare replacement part numbers
Part numbers such as 10465527, 10465582, 6490, 6490N, and 89017557 appear across several 4.2L listings. Match the number on the existing starter or use the vehicle’s confirmed-fit information before purchase.
Consider evidence and value
Ratings and review counts can provide context, but they do not replace fitment verification. The supplied prices range from $41.96 to $76.99, while coverage and specifications vary considerably.
Check installation requirements
Product 1 specifically states that mounting hardware is not included. Several listings recommend professional installation, and the vehicle should be secured and electrically isolated according to the applicable service instructions.
- Photograph the old starter label and compare its connector, mounting arrangement, tooth count, rotation, and part number with the replacement listing.
- If the Trailblazer only clicks or cranks slowly, check the battery, cables, grounds, and connections before assuming the starter is the sole fault.
Our Top 10 Best 2004 Chevy Trailblazer Starter Picks and Reviews
1. OEG Parts 10465527 Starter Motor for Buick Rainier 4.2L 2004-2005, Automotive Replacement Part
OEG Parts provides one of the clearest matches for a 2004 Trailblazer 4.2L. It is listed at $61.95 with a 4.5 rating from 874 reviews, making it the most broadly reviewed option in this roundup.
Key Features That Stand Out
- New 12V PG260L starter with a 1.6kW rating.
- 11-tooth gear with clockwise rotation.
- Listed for the 2004 Trailblazer North Face, LS, and LT 4.2L.
- References 10465527, 10465582, 6490, 6490N, and numerous additional replacement numbers.
Why It Stands Out
The combination of direct 2004 4.2L fitment, useful specification details, and the largest supplied review count gives this option a strong evidence-based position. The listing says mounting hardware is not included, so that detail should be checked before ordering.
Best For
Pros and Cons
- Explicit 2004 Trailblazer 4.2L coverage.
- 1.6kW and 11-tooth specifications are clearly supplied.
- 874 supplied reviews provide more rating context than most entries.
- Mounting hardware is not included.
- Fitment still needs to be confirmed against the vehicle and old part.
2. Starter Motor for Chevy Colorado, Trailblazer, GMC Canyon, Envoy, Buick Rainier, Hummer H3, 2002-2006
This $51.99 unbranded starter covers the 2002–2005 Trailblazer 4.2L and Trailblazer EXT 4.2L. Its supplied 4.2 rating is based on nine reviews, so the rating has limited review volume behind it.
Key Features That Stand Out
- Listed for Trailblazer L6 4.2L from 2002–2005.
- PMGR design with 12V operation.
- 1.6kW power rating, clockwise rotation, and 11 teeth.
- Also lists coverage for Colorado, Canyon, Envoy, Rainier, H3, Ascender, Bravada, and Saab 9-7x applications.
Why It Stands Out
This is a straightforward alternative to the first option because its 4.2L Trailblazer fitment and electrical specifications align with the 2004 model year. The unbranded presentation and small supplied review count make careful part-number checking especially important.
Best For
Pros and Cons
- Directly lists the 2002–2005 4.2L Trailblazer.
- Matches the common 12V, 1.6kW, 11-tooth configuration.
- Only nine supplied reviews accompany the rating.
- Brand and warranty details are not supplied.
3. 6494N New Starter for Chevy Silverado, Suburban, Tahoe, Avalanche, GMC Sierra, Yukon, Express, Trailblazer, Buick Rainier, 2003-2008
At $51.99, this new 6494N starter is an economical option for specific later Trailblazer applications. Its listing covers Trailblazer models from 2006–2008 and Trailblazer EXT from 2004–2006, rather than clearly identifying a standard 2004 4.2L Trailblazer.
Key Features That Stand Out
- Listed as new with 12V operation.
- 1.1kW power rating, nine teeth, and clockwise rotation.
- References 6494N, 6494, 12568051, 12578050, and other replacement numbers.
- Broad coverage for Chevrolet, GMC, Buick, Cadillac, Isuzu, and Saab vehicles.
Why It Stands Out
The low supplied price and broad vehicle coverage make it useful for shoppers with a compatible later Trailblazer or related GM vehicle. However, its nine-tooth, 1.1kW configuration differs from the 1.6kW, 11-tooth pattern shown by the primary 4.2L listings.
Best For
Pros and Cons
- New starter at a supplied $51.99 price.
- Broad replacement-number coverage.
- Clear 1.1kW, nine-tooth specifications.
- Not a clear match for the standard 2004 4.2L Trailblazer.
- Only three supplied reviews accompany the 5.0 rating.
4. 6494N Starter for Chevrolet Silverado, Tahoe, Suburban, Avalanche, Chevy Express and Trailblazer, 4.8L 5.3L, 2003-2008
This $59.99 6494N listing is aimed at 4.8L and 5.3L Chevrolet applications, including Trailblazer V8 models from 2006–2008 and Trailblazer EXT V8 models from 2004–2006. It should not be selected for a 2004 4.2L vehicle without confirmed fitment.
Key Features That Stand Out
- PMGR starter with 12V operation.
- 1.1kW rating, nine-tooth pinion, and clockwise rotation.
- Listed as all-new rather than remanufactured.
- References 6494N, 6494, 8000016, 89017440, 12568051, and other numbers.
Why It Stands Out
The detailed V8 application list is the main reason to consider this option. Its specifications clearly separate it from the 4.2L choices, helping V8 Trailblazer owners narrow their search while warning 4.2L owners away from an unconfirmed match.
Best For
Pros and Cons
- Clear 4.8L and 5.3L application focus.
- All-new construction is stated in the supplied features.
- 4.4 rating from 184 supplied reviews.
- Not listed for the 2004 4.2L Trailblazer.
- Installation is recommended for qualified mechanics.
5. maXpeedingrods 6494N Starter Motor for Chevy Silverado 1500 and Suburban 1500, 12V Replacement
The maXpeedingrods 6494N is priced at $50.99 and lists Trailblazer 5.3L applications from 2006–2008, plus Trailblazer EXT 5.3L applications from 2004–2006. Its 4.5 rating is based on 37 supplied reviews.
Key Features That Stand Out
- 12V, 1.1kW, nine-tooth, clockwise PMGR configuration.
- References 6494N, 12568051, 12578050, 12592294, 12604477, and 89017440.
- Broad fitment for Chevrolet, GMC, Buick, Cadillac, Isuzu, and Saab models.
- The supplied listing states a two-year warranty for quality-related issues.
Why It Stands Out
This is a value-focused choice for the listed 5.3L applications, particularly when the original starter number matches. It is not a direct recommendation for a 2004 4.2L Trailblazer because the supplied Trailblazer fitment is V8-specific.
Best For
Pros and Cons
- Supplied two-year quality-related warranty.
- Competitive $50.99 price.
- 37 supplied reviews support the 4.5 rating.
- Trailblazer fitment is for 5.3L models from later years.
- Its nine-tooth, 1.1kW setup differs from common 4.2L listings.
6. A-Premium 12V 1.6KW Starter Motor, 11-Tooth Clockwise Replacement for Compatible Vehicles
A-Premium offers a clearly specified 4.2L replacement at $76.99, the highest supplied price in this roundup. It has a 4.6 rating from 37 reviews and includes a stated one-year unlimited-mileage guarantee.
Key Features That Stand Out
- Listed for Trailblazer and Trailblazer EXT 4.2L models from 2002–2005.
- 12V, 1.6kW, 11-tooth, clockwise configuration.
- References 10465527, 6490, 6490N, 410-12278, and other replacement numbers.
- One-year unlimited-mileage guarantee is stated in the supplied listing.
Why It Stands Out
This option suits shoppers who prioritize a named replacement brand and a stated guarantee. Its fitment and specifications align with the 2004 4.2L Trailblazer, although its higher price should be weighed against the specific coverage offered.
Best For
Pros and Cons
- Direct 2002–2005 4.2L Trailblazer coverage.
- 1.6kW and 11-tooth specifications match the main 4.2L pattern.
- One-year unlimited-mileage guarantee is supplied.
- Highest supplied price at $76.99.
- Only 37 supplied reviews are available for context.
7. 6490 New Starter Motor for Chevy Trailblazer 4.2L L6, 2002-2005, Replacement Automotive Part
This $69.99 new 6490 starter is specifically presented for the Trailblazer 4.2L L6 from 2002–2005. It has a 5.0 rating from one supplied review, so that rating should be treated as limited evidence.
Key Features That Stand Out
- 12V, 1.6kW, 11-tooth, clockwise design.
- Long list of OE reference numbers, including 6490, 6490N, 10465527, and 10465582.
- Stated high-conductivity solenoid and copper coil construction.
- Stated aluminum alloy housing and steel internal components.
Why It Stands Out
The specific 4.2L fitment and extensive replacement-number list make this a logical candidate when the original starter carries one of the listed numbers. The supplied construction claims are useful context, but they should not replace direct compatibility verification.
Best For
Pros and Cons
- Explicit 2002–2005 Trailblazer 4.2L fitment.
- Broad reference-number coverage.
- Detailed 1.6kW, 11-tooth specifications.
- 5.0 rating is based on one supplied review.
- Brand and warranty details are not supplied.
8. 6490N Starter Motor for GMC Canyon, Envoy, and Buick Rainier, Vehicle Replacement Part
At $44.99, this is one of the lower-cost 4.2L options. The supplied listing covers Trailblazer and Trailblazer EXT 4.2L models from 2002–2005, but no rating or review count was supplied.
Key Features That Stand Out
- 12V, 1.6kW, 11-tooth, clockwise PMGR starter.
- Listed as brand-new and direct-fit.
- References 6490, 6490N, 10465527, 410-12278, and related numbers.
- Listing describes a CNC-machined aluminum housing, copper windings, and reinforced drive gear.
Why It Stands Out
This option combines a low supplied price with the familiar 4.2L specification pattern. Because no rating or review count is supplied, fitment evidence and the original part number deserve extra attention before purchase.
Best For
Pros and Cons
- Lowest-priced 1.6kW 4.2L option among several listings.
- Detailed construction and testing claims are supplied.
- Broad 4.2L vehicle coverage.
- No rating or review count is supplied.
- Verify the exact original number and confirmed fit before ordering.
9. 10465582 Replacement Starter for Chevrolet Trailblazer 4.2L, 2002-2006, Direct-Fit Automotive Motor Part
This $52.99 starter is listed for the Trailblazer 4.2L and Trailblazer EXT 4.2L from 2002–2005, with a 4.6 rating from 17 supplied reviews. Its reference-number list overlaps substantially with other 4.2L choices.
Key Features That Stand Out
- 12V, 1.6kW, 11-tooth, clockwise PMGR design.
- References 10465582, 10465527, 6490, 6490N, and numerous other numbers.
- Listing states that parts are tested with professional equipment.
- Fitment includes several related GM, Isuzu, Oldsmobile, Buick, and Saab applications.
Why It Stands Out
The extensive part-number coverage makes this a practical candidate for shoppers whose old starter is marked 10465582 or a related number. The 4.2L fitment is relevant, but the listing still advises checking the confirmed-fit information.
Best For
Pros and Cons
- Clear 4.2L Trailblazer coverage.
- Useful 1.6kW and 11-tooth specifications.
- 4.6 rating from 17 supplied reviews.
- Fitment notes require careful review before ordering.
- Brand and warranty information are not supplied.
10. 89017557 Starter Motor for Chevy Colorado, GMC Canyon, Buick Rainier, Trailblazer, and Envoy, 12V 1.2KW 11-Tooth
This $41.96 starter is the lowest-priced option in the supplied comparison. It lists Trailblazer 4.2L applications from 2002–2005 and has a 4.6 rating from 33 supplied reviews.
Key Features That Stand Out
- Title specifies 12V, 1.2kW, and an 11-tooth design.
- Listed for Trailblazer and Trailblazer EXT 4.2L from 2002–2005.
- References 89017557, 10465527, 3231476, 3231482, and other numbers.
- Listing describes overheat protection, short-circuit prevention, and high-quality bearings.
Why It Stands Out
The combination of direct 4.2L coverage, 33 supplied reviews, and the lowest supplied price makes this an appealing budget candidate. Its listed 1.2kW rating differs from the 1.6kW rating shown by many other 4.2L options, so verify the original specification before buying.
Best For
Pros and Cons
- Lowest supplied price at $41.96.
- 33 supplied reviews support the 4.6 rating.
- Broad related-vehicle coverage and multiple reference numbers.
- Listed 1.2kW output differs from the common 1.6kW 4.2L listings.
- Confirm the exact starter specification before ordering.
Disconnect the battery and follow the vehicle or manufacturer service instructions before starter removal. Confirm the engine, model configuration, tooth count, rotation, connectors, mounting arrangement, and original part number. If the symptoms are unclear, a starting-system diagnosis may prevent replacing a functioning starter.
Complete Buying Guide for the Best 2004 Chevy Trailblazer Starter
Compatibility and intended use
For a standard 2004 Trailblazer with the 4.2L L6 engine, begin with listings that explicitly identify 2002–2005 Trailblazer 4.2L fitment. Products 1, 2, 6, 7, 8, 9, and 10 provide that type of coverage in the supplied data.
Products 3, 4, and 5 are more closely associated with later Trailblazer or Trailblazer EXT V8 applications. Their presence in a general Trailblazer search does not make them suitable for every 2004 vehicle.
Before ordering, compare the old starter’s label and the vehicle’s engine information with the current product page. For additional starting-system preparation, readers may also find this guide to portable car jump starter options useful, although a jump starter is not a replacement starter motor.
Price and value
Options around the lower supplied prices suit shoppers prioritizing affordability, provided the 4.2L fitment and original part number match.
Mid-priced choices offer broader reference-number coverage, more supplied review context, or clearer application details for common Trailblazer configurations.
The highest-priced option may suit shoppers who value a named brand and stated guarantee, but fitment remains more important than price.
Dos and Don’ts
- Match the engine, year, trim or configuration, tooth count, rotation, voltage, power rating, and reference number.
- Check current price, availability, return terms, and warranty information on the product page.
- Inspect the battery cables, grounds, battery condition, and starter connections during diagnosis.
- Use correct tools and follow the vehicle’s service procedure during installation.
- Do not choose a 6494N V8 starter for a 4.2L Trailblazer without confirmed fitment.
- Do not assume two starters are interchangeable because they share a vehicle family name.
- Do not rely on a high rating with a very small supplied review count as proof of compatibility.
- Do not work beneath an inadequately supported vehicle or with the battery connected during starter removal.
Practical installation and maintenance tips
- Record the original starter number before removal and retain it until the replacement is confirmed.
- Clean applicable cable and ground contact points without damaging terminals or insulation.
- Route wiring away from heat and moving components, and tighten connections according to the service information.
- After installation, evaluate cranking behavior and investigate abnormal grinding, clicking, or slow operation rather than repeatedly cycling the key.
Gear and setup check
Have the correct socket set, vehicle support equipment, eye protection, battery-disconnection tools, and the applicable service instructions ready before beginning work. A professional technician can help when access, diagnosis, or electrical testing is uncertain.
Related starting-system equipment
A portable jump starter can help with a discharged battery, but it cannot correct a failed starter motor, damaged cable, poor ground, or another starting-system fault. For SUV-focused emergency equipment, see this comparison of jump starters for an SUV. For heavier vehicles and broader electrical demands, this guide to heavy-duty 12V and 24V jump starters addresses a different use case.
Quick Recap
- OEG Parts 10465527: Strong all-around 2004 4.2L match with 1.6kW, 11 teeth, and the largest supplied review count.
- Unbranded Starter Motor: Lower-priced 4.2L alternative with matching 12V, 1.6kW, 11-tooth specifications.
- Unbranded 6494N Starter: Best suited to later Trailblazer and related applications using the 1.1kW, nine-tooth setup.
- Unbranded 6494N V8 Starter: V8-focused option for listed 4.8L and 5.3L models, not a general 4.2L choice.
- maXpeedingrods 6494N: Later 5.3L option with a supplied two-year quality-related warranty.
- A-Premium Starter Motor: Named-brand 4.2L option with a supplied one-year unlimited-mileage guarantee.
- Unbranded 6490 Starter: 4.2L candidate with extensive OE reference numbers but very limited rating evidence.
- Unbranded 6490N Starter: Low-cost 4.2L option with detailed construction claims and no supplied rating.
- Unbranded 10465582 Starter: 4.2L replacement with broad reference-number coverage and a 4.6 supplied rating.
- Unbranded 89017557 Starter: Lowest supplied price, but its listed 1.2kW rating needs careful comparison.
- Always verify the engine, original starter number, tooth count, rotation, and confirmed fit before purchasing.
- Prices, availability, ratings, and listing details can change, so review the current product page before ordering.
Frequently Asked Questions About Best 2004 Chevy Trailblazer Starter
The OEG Parts 10465527 is the strongest overall match in this comparison for many 2004 Trailblazer 4.2L applications. It lists 12V, 1.6kW, 11 teeth, clockwise rotation, and a 4.5 rating from 874 supplied reviews.
Check voltage, power rating, tooth count, rotation, starter type, connectors, mounting arrangement, and the original replacement number. Many 4.2L listings in this guide show 12V, 1.6kW, 11 teeth, and clockwise rotation.
No. The supplied 6494N listings primarily identify later Trailblazer or Trailblazer EXT V8 applications and use a 1.1kW, nine-tooth configuration. Confirm the engine and original part number before considering one.
No. Product 10 has the lowest supplied price, but its listed 1.2kW rating differs from many 4.2L options. A correct fit and matching specification are more important than price alone.
Not automatically. A click or slow crank can also involve the battery, battery cables, grounds, connections, or another starting-system issue. Diagnose those areas before replacing the starter.
Installation depends on access, tools, diagnosis, and your experience with vehicle electrical components. Disconnect the battery, support the vehicle correctly, follow service instructions, and use a qualified mechanic when uncertain.
For many 2004 Chevy Trailblazer 4.2L owners, the OEG Parts 10465527 provides the clearest balance of stated fitment, familiar specifications, and substantial supplied review context. The A-Premium, 6490, 6490N, 10465582, and 89017557 options are useful alternatives when their reference numbers and specifications match.
The V8-oriented 6494N listings belong to a different fitment group and should be considered only for the listed engines and model years. Whichever starter you choose, verify the current listing and the vehicle’s original part number before installation.
This roundup was evaluated from the supplied product titles, feature bullets, prices, images, affiliate links, ratings, and review counts. Products were compared for stated Trailblazer fitment, engine coverage, replacement numbers, voltage, power rating, tooth count, rotation, warranty statements, price, and available rating context. No first-hand testing, installation, ownership, or independent performance testing was available, so the recommendations are evidence-based and should not replace vehicle-specific fitment verification or professional diagnosis.