This page lists 34 electrical parts for the 2004 Buick Rainier, across 9 part types, covering both the 4.2L L6 and the 5.3L V8. Every part shows its brand, manufacturer part number and fitment notes.
The electrical system on the 2004 Buick Rainier covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. The largest groups are Alternator / Generator (14 parts), Battery (5 parts) and Body Control Module (BCM) (5 parts). The other 6 part types cover the remaining 10 parts.
The 2004 Buick Rainier was sold with both the 4.2L L6 and the 5.3L V8. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
16 brands supply electrical parts for the 2004 Buick Rainier, led by GM GENUINE (5 parts), ACDELCO (4 parts) and DEKA (3 parts), plus 13 more brands. Quality grades include New, Remanufactured and AGM.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2004 Buick Rainier. 5 parts have it, including WAI GLOBAL 8290N (Alternator / Generator) and DEKA 9A78DT (Battery). Each part number opens a page with every vehicle that part fits.
Alternator / Generator
New
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAI GLOBAL Popular Fits: 4.2L L6 | 8290N | 🇺🇸 US 🇨🇦 CA | 150 Amps | View on Amazon |
| ACDELCO Fits: 4.2L L6 | 3351091 | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| BOSCH Fits: 4.2L L6 | AL8805N | 🇺🇸 US 🇨🇦 CA | Does Not Include Pulley | View on Amazon |
| PURE ENERGY Fits: 4.2L L6 | 8290603N | 🇺🇸 US 🇨🇦 CA | 150 Amps | View on Amazon |
| REMY Fits: 4.2L L6 | 91652 | 🇺🇸 US 🇨🇦 CA | Voltage: 12 Volts (Direct Current) | View on Amazon |
| TERREPOWER Fits: 4.2L L6 | N8290 | 🇺🇸 US 🇨🇦 CA | 150 Amps | View on Amazon |
| TYC Fits: 4.2L L6 | 208290 | 🇺🇸 US 🇨🇦 CA | 150 Amps | View on Amazon |
Remanufactured
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Popular Fits: 4.2L L6 | 3212127 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| PURE ENERGY Popular Fits: 4.2L L6 | 8290603 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| ACDELCO Fits: 4.2L L6 | 3342527A | 🇺🇸 US 🇨🇦 CA | GoldRemanufactured | View on Amazon |
| BOSCH Fits: 4.2L L6 | AL8805X | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| REMY Fits: 4.2L L6 | 22053 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| TERREPOWER Fits: 4.2L L6 | 8290 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| WAI GLOBAL Fits: 4.2L L6 | 8290R | 🇺🇸 US 🇨🇦 CA | Power Select Reman | View on Amazon |
This table covers the alternators that charge the battery and run the electrical load. Typical signs include dim lights at idle, a battery lamp, or a growl from the charging pulley. Load-test the battery and inspect the belt and grounds — a bad ground mimics a failed alternator.
14 Alternator / Generator parts for the 2004 Buick Rainier come from 8 brands — WAI GLOBAL, ACDELCO, BOSCH and 5 other brands. The "Popular" part is WAI GLOBAL 8290N.
The New section lists 7 options from WAI GLOBAL, ACDELCO, BOSCH and 4 other brands — brand-new units rather than rebuilt ones. WAI GLOBAL 8290N is listed in this group.
The Remanufactured section lists 7 options from GM GENUINE, PURE ENERGY, ACDELCO and 4 other brands — factory-rebuilt units with new wear components. GM GENUINE 3212127 is listed in this group.
Battery
AGM (Extended Life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DEKA Popular Fits: 4.2L L6 | 9A78DT | 🇺🇸 US 🇨🇦 CA | IntimidatorAGM | View on Amazon |
| ACDELCO Fits: 4.2L L6 | 78XAGM | 🇺🇸 US 🇨🇦 CA | AGMBCI Group: 78 | View on Amazon |
| DEKA Fits: 4.2L L6 | 9A78 | 🇺🇸 US 🇨🇦 CA | IntimidatorAGM | View on Amazon |
| FVP Fits: 4.2L L6 | 78AGMG | 🇺🇸 US 🇨🇦 CA | Platinum AGMBCI Group: 78 | View on Amazon |
Performance AGM (Extended Life + Increased Power)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FULLRIVER Fits: 4.2L L6 | FT82578 | 🇺🇸 US 🇨🇦 CA | AGMBCI Group 78 | View on Amazon |
This table covers the batteries listed by group size and specification. Typical signs include slow cranking, a battery lamp, or a no-start after the vehicle sat overnight. Confirm group size and terminal layout in the notes. Clean the posts and the ground before condemning the battery.
5 Battery parts are listed for the 2004 Buick Rainier, from DEKA, ACDELCO, FVP and 1 other brand. DEKA 9A78DT carries the "Popular" badge.
The AGM (Extended Life) section lists 4 options from DEKA, ACDELCO and FVP — grouped under the catalog's "AGM (Extended Life)" designation — the notes column spells out what sets them apart. DEKA 9A78DT is listed in this group.
The Performance AGM (Extended Life + Increased Power) section lists 1 option from FULLRIVER — grouped under the catalog's "Performance AGM (Extended Life + Increased Power)" designation — the notes column spells out what sets them apart. FULLRIVER FT82578 is listed in this group.
Part numbers include DEKA 9A78DT, ACDELCO 78XAGM and DEKA 9A78, among others listed above.
Battery Cable
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 4.2L L6 | A354HDCL2 | 🇺🇸 US 🇨🇦 CA | NegativeBATTERY TO GROUND | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 4.2L L6 | A414DEF | 🇺🇸 US 🇨🇦 CA | PositiveBATTERY TO SWITCH | View on Amazon |
This table covers the positive and ground cables that run from the battery. Typical signs include a stretched or frayed cable, or a control that no longer reaches the end of its travel. Route the new cable through the same clips. A kinked cable binds and fails early.
2 Battery Cable parts for the 2004 Buick Rainier come from STANDARD MOTOR PRODUCTS.
Listed part numbers: STANDARD MOTOR PRODUCTS A354HDCL2 and STANDARD MOTOR PRODUCTS A414DEF.
Battery Hold Down
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 4.2L L6 | 390030 | 🇺🇸 US 🇨🇦 CA | Battery Hold-Down | View on Amazon |
This table covers the clamps and brackets that secure the battery.
This group shows a single part: DORMAN 390030.
Battery Terminal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DEKA Fits: 4.2L L6 | 00351 | 🇺🇸 US 🇨🇦 CA | Universal Terminal for side terminal batteries | View on Amazon |
This table covers the terminals and clamps that connect cables to the battery posts.
One part is listed for the 2004 Buick Rainier — DEKA 00351.
Battery Terminal Protector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 4.2L L6 | 19119011 | 🇺🇸 US 🇨🇦 CA | Red | View on Amazon |
This table covers the covers that protect battery terminals.
One part is listed for the 2004 Buick Rainier — GM GENUINE 19119011.
Battery Tray
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 4.2L L6 | 00595 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the trays the battery sits in.
One part is listed for the 2004 Buick Rainier — DORMAN 00595.
Body Control Module (BCM)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Popular Fits: 4.2L L6 | 21812763 | 🇺🇸 US 🇨🇦 CA | wo/BA3 RPO | View on Amazon |
| ACDELCO Fits: 4.2L L6 | 15114670 | 🇺🇸 US 🇨🇦 CA | GM Original EquipmentLocal Programming Required | View on Amazon |
| BSE Fits: 4.2L L6 | BCM13895 | 🇺🇸 US 🇨🇦 CA | Blue Streak Electronics Premium QualityReman | View on Amazon |
| DORMAN Fits: 4.2L L6 | 502006 | 🇺🇸 US 🇨🇦 CA | Reman. | View on Amazon |
| GM GENUINE Fits: 4.2L L6 | 19370406 | 🇺🇸 US 🇨🇦 CA | RemanLocal Programming Required | View on Amazon |
This table covers the body-control modules that run lighting, locks and wipers.
5 Body Control Module (BCM) parts for the 2004 Buick Rainier come from 4 brands — GM GENUINE, ACDELCO, BSE and 1 other brand. The "Popular" part is GM GENUINE 21812763.
This group includes GM GENUINE 21812763, ACDELCO 15114670 and BSE BCM13895 and the remaining parts above.
Flasher
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Fits: 4.2L L6 | 15231201 | 🇺🇸 US 🇨🇦 CA | Moraine, OH Plant Code (Day),Oklahoma City, OK Plant Code (OKL)Except Parts Package (Bag) | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 4.2L L6 | EFL36 | 🇺🇸 US 🇨🇦 CA | HAZARD WARNING | View on Amazon |
| TRIDON / NOVITA Fits: 4.2L L6 | LM486 | 🇺🇸 US 🇨🇦 CA | Lighting Control Module | View on Amazon |
| WELLS Fits: 4.2L L6 | 1R3544 | 🇺🇸 US 🇨🇦 CA | Fits Turn Signalor HAZARD WARNING | View on Amazon |
This table covers the flasher units that blink the turn signals and hazards.
4 Flasher parts are listed for the 2004 Buick Rainier, from GM GENUINE, STANDARD MOTOR PRODUCTS, TRIDON / NOVITA and 1 other brand.
Listed part numbers: GM GENUINE 15231201, STANDARD MOTOR PRODUCTS EFL36 and TRIDON / NOVITA LM486, plus the other parts above.
Buying Electrical Parts for a 2004 Buick Rainier
On this vehicle, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors.
- Match the engine first. Every electrical part here is engine-specific; each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, clean or renew the battery terminals and grounds with any charging-system repair.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Alternator / Generator and Battery .
Frequently Asked Questions
How many electrical parts fit the 2004 Buick Rainier?
Our catalog currently lists 34 electrical parts for the 2004 Buick Rainier across 9 subcategories and 16 brands, covering both the 4.2L L6 and the 5.3L V8. Each part is matched to the engine(s) it fits.
Do electrical parts differ between 2004 Buick Rainier engines?
Yes. Every electrical part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of electrical problems on a 2004 Buick Rainier?
Common symptoms include slow cranking on cold mornings, a battery light that flickers, dim lights at idle, or a check-engine code pointing at a sensor circuit. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, clean or renew the battery terminals and grounds with any charging-system repair.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2004 Buick Rainier was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2004 Buick Rainier?
First match the engine — each row shows which engine(s) the part fits. Then test before replacing — a failed alternator and a bad ground can look identical, and sensors are frequently condemned for wiring faults. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2004 Buick Rainier
Electrical Parts for Other Buick Rainier Years
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