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GMC（Oldsmobile, Hummer）

GMC vehicles are built to work hard, and our engine parts work just as hard. Automotive-LeaderStore specializes in high-quality aftermarket components for GMC trucks and SUVs. From heavy-duty fuel injectors to high-sensitivity O2 sensors, we help you keep your engine running smoothly and powerfully.

Find Parts by Vehicle

Year

Make

Model

Part Number (Optional)

FAQ & Support

🚦 1. Trouble Codes & Symptoms

Q1: My car shows codes like P0420 / P0171 / P0138. What do they mean?

These are common codes related to the fuel system or oxygen sensors:

P0420: Catalyst efficiency below threshold
P0171: System too lean
P0138: O2 sensor voltage high

They often indicate a worn oxygen sensor, exhaust leak, or ignition issue. If you're not sure, simply tell us your year, make, model, and engine—we'll check the exact part you need.

Q2: My engine shakes at idle. Is my ignition coil bad?

It's very possible. Common symptoms of a failing ignition coil include:

Rough idle or shaking
Hard cold starts
Poor acceleration
Higher fuel consumption
Misfire popping noise

Tell us your vehicle info—our team can help you identify the cause.

Q3: What are the symptoms of a bad oxygen sensor?

Typical signs include: Check Engine Light on, Increased fuel consumption, Poor acceleration, Strong fuel smell, and Slow throttle response.

Most sensors should be replaced every 80,000–100,000 km.

🔍 2. Fitment & Compatibility

Q4: How do I know which oxygen sensor fits my car?

Just provide: Year, Make, Model, and Engine size.

We'll confirm: Upstream or downstream, Correct connector, Proper OEM reference number, and Federal vs. California emissions compatibility.

Q5: What's the difference between OEM and aftermarket ignition coils?

OEM: Same quality as the factory part; long-lasting.
High-quality aftermarket: Close to OEM but more affordable.

We only offer high-grade, reliable ignition coils.

Q6: How many oxygen sensors does my car have?

Most vehicles have 2–4 sensors (Upstream front and Downstream rear). We can confirm the exact number for your vehicle.

🛒 3. Buying, Quality & Concerns

Q7: Are cheap oxygen sensors reliable?

They work for a short time but usually cause issues like short lifespan, slow response, and frequent check engine lights.

We only sell new, high-quality, fully tested sensors.

Q8: How can I avoid buying a refurbished or used auto part?

Check for scratches on the connector, dirty wiring, or marks on threads.

Our parts are 100% brand new, never refurbished, and fully tested.

🧰 4. Installation & Usage

Q9: Can I install an oxygen sensor myself?

Yes. Difficulty: medium.

You'll need an O2 sensor socket, Anti-seize compound, and a Torque wrench. We recommend clearing fault codes with an OBD scanner after installation.

Q10: Do ignition coils need programming after replacement?

In most vehicles, no programming is required. Just swap the old coil with the new one.

💰 5. Value & Performance

Q11: Your parts cost less than OEM. Are they really reliable?

Yes—our parts use the same-grade materials and testing standards as OEM suppliers. Because we don't go through dealer channels, the price is much more affordable.

About us

Automotive Leader started with a simple mission: to provide mechanics and DIYers with OEM-grade parts at affordable prices.

China Address

Room 602, No. 152 Helong East Road, Helong Subdistrict, Baiyun District, Guangzhou City Postal Code: 510000

U.S. Address:
7600 LTC Parkway 34986
PORT SAINT LUCIE, FL - United States

Phone Number: +86 15812449181

Email: support@automotive-leaderstore.com

Logistics Policy

1. U.S. Warehouse (Standard Option)
Handling time: 1-3 business days
Transit time (days): 3-6 business days via USPS/UPS/FedEx.

2. China Warehouse (Standard Option)
Handling time: 1-3 business days
Transit time (days): 14-22 business days via USPS/UPS/FedEx.

Refund and Return Policy

30-Day Return Policy / Return shipping is free.

We do not accept direct exchanges.

After receiving and inspecting your returned item, we will notify you whether your refund has been approved.

If approved, the refund will be processed back to your original payment method within 5 business days.

Please note that your bank or credit card company may also require additional time to process and reflect the refund.

If you have not received your refund within 10 business days after your return request has been approved, please contact us.

Contact: support@automotive-leaderstore.com

Account

GMC（Oldsmobile, Hummer）

Find Parts by Vehicle

4Pcs Fuel Injectors Nozzles for Chevy Impala Colorado Malibu Cadillac ATS GMC Canyon 3.6L | 12627093 12662564

6Pcs Fuel Injectors Nozzle for Buick Allure LaCrosse Cadillac CTS SRX Chevy Equinox GMC Terrain 3.0L 3.6L | 12629927 FIJ0030

Fuel Injectors Nozzles for Chevy Equinox Malibu Cruze Encore GMC Terrain Buick Encore 2.4L Ecotec | 12644767 FJ1293

4Pcs Fuel Injectors for Buick LaCrosse Regal Chevy Equinox GMC Terrain 2.4L (2010-2017) | 12633784 FJ1154

6Pcs Fuel Injectors for Buick Enclave Chevy Traverse GMC Acadia 3.6L V6 (2009-2013) | 12638530 FJ994

6Pcs Fuel Injectors for Cadillac CTS SRX Chevy Camaro GMC Canyon 3.0L 3.6L | 12634126 FJ1157

8Pcs Fuel Injectors for Chevy Silverado Suburban GMC Sierra Cadillac Escalade 6.0L 6.2L V8 | 12613412 FJ1089

4Pcs Oxygen Sensor Set for GMC Yukon & Sierra 1500/2500 (08-14) | 234-4256 234-4668

4Pcs Oxygen Sensor Set for Chevy Silverado & Tahoe (2003-2007) | 234-4668

Downstream Oxygen Sensor for Chevy Silverado & GMC Sierra (2003-2007) | 234-4256 ES20094 25024736

Up/Down Heated O2 Sensor for Chevy Silverado & Tahoe (2003-2005) | 234-4668

4Pcs Oxygen Sensor for Chevy Silverado & GMC Sierra 1500/2500 (03-06) | 234-4669 234-4407

FAQ & Support

🚦 1. Trouble Codes & Symptoms

🔍 2. Fitment & Compatibility

🛒 3. Buying, Quality & Concerns

🧰 4. Installation & Usage

💰 5. Value & Performance

About us

Logistics Policy

Refund and Return Policy

Country/Region

Country/Region

GMC（Oldsmobile, Hummer）

Find Parts by Vehicle

4Pcs Fuel Injectors Nozzles for Chevy Impala Colorado Malibu Cadillac ATS GMC Canyon 3.6L | 12627093 12662564

6Pcs Fuel Injectors Nozzle for Buick Allure LaCrosse Cadillac CTS SRX Chevy Equinox GMC Terrain 3.0L 3.6L | 12629927 FIJ0030

Fuel Injectors Nozzles for Chevy Equinox Malibu Cruze Encore GMC Terrain Buick Encore 2.4L Ecotec | 12644767 FJ1293

4Pcs Fuel Injectors for Buick LaCrosse Regal Chevy Equinox GMC Terrain 2.4L (2010-2017) | 12633784 FJ1154

6Pcs Fuel Injectors for Buick Enclave Chevy Traverse GMC Acadia 3.6L V6 (2009-2013) | 12638530 FJ994

6Pcs Fuel Injectors for Cadillac CTS SRX Chevy Camaro GMC Canyon 3.0L 3.6L | 12634126 FJ1157

8Pcs Fuel Injectors for Chevy Silverado Suburban GMC Sierra Cadillac Escalade 6.0L 6.2L V8 | 12613412 FJ1089

4Pcs Oxygen Sensor Set for GMC Yukon & Sierra 1500/2500 (08-14) | 234-4256 234-4668

4Pcs Oxygen Sensor Set for Chevy Silverado & Tahoe (2003-2007) | 234-4668

Downstream Oxygen Sensor for Chevy Silverado & GMC Sierra (2003-2007) | 234-4256 ES20094 25024736

Up/Down Heated O2 Sensor for Chevy Silverado & Tahoe (2003-2005) | 234-4668

4Pcs Oxygen Sensor for Chevy Silverado & GMC Sierra 1500/2500 (03-06) | 234-4669 234-4407

FAQ & Support

🚦 1. Trouble Codes & Symptoms

🔍 2. Fitment & Compatibility

🛒 3. Buying, Quality & Concerns

🧰 4. Installation & Usage

💰 5. Value & Performance

About us

Logistics Policy

Refund and Return Policy