CHEVROLET TRUCK 400-00188 Automatic Transmission 6.0L

( Brand: Chevrolet Truck ), ( Part Type: Transmission ), ( Conditions Options: 6.0, At ), ( Genuine Oem: Yes ), ( Ipn: 400-00188 )

Review CHEVROLET TRUCK Automatic Transmission 6.0l Pickup fits CLASSIC SIERRA 1500 2006–2007

The **Chevrolet 400-00188 Automatic Transmission** is a robust and meticulously engineered component designed exclusively for the **6.0L Vortec V8** found in the **2006-2007 Chevrolet Sierra 1500**, offering a seamless blend of power and precision for this iconic full-size pickup truck. This transmission is a **4-speed automatic**, featuring a **TH465 Hydramatic** underpinning, which has long been celebrated for its durability and smooth operation in heavy-duty applications. Built to handle the raw torque output of the **LQ9 6.0L V8**, this transmission is engineered with reinforced internal components, including a **heavy-duty torque converter** with a stamped housing and a **multi-plate clutch pack**, ensuring reliable engagement and efficient power transfer even under demanding conditions. The **valve body** is precision-machined to deliver crisp shifts, while the **planetary gearset** is designed for longevity, capable of withstanding the rigors of towing, hauling, and off-road adventures. This transmission is fully compatible with the **Sierra 1500 s drivetrain**, including the **6L80 6-speed automatic** shift solenoids and wiring harness, allowing for easy integration into existing systems. Whether you're restoring a classic Sierra 1500 or upgrading an existing vehicle, this transmission provides a **proven, high-performance solution** that balances strength with refined operation, ensuring a reliable and enjoyable driving experience for years to come.

### **Pros and Cons of Buying a 2006-2007 Chevrolet Sierra 1500 with a 6.0L V8 and 400-00188 Automatic Transmission**

#### **Pros**

1. **Reliable Engine** The 6.0L V8 (LQ4) is a robust, high-torque engine known for durability, especially when properly maintained. It s capable of handling heavy loads, making it ideal for towing or off-roading.

2. **Strong Towing Capacity** The Sierra 1500 in these years had a towing rating of up to **8,500 lbs** with the proper equipment, making it a solid choice for work trucks or trailers.

3. **Proven Transmission** The **400-00188** (4L60-E) automatic transmission is a well-established unit, widely used in GM trucks from the late '90s to mid-2000s. With proper maintenance, it can last **200,000 miles**, especially if fluid changes were done regularly.

4. **Classic Truck Appeal** The 2006-2007 Sierra 1500 retains a nostalgic, rugged look that many buyers appreciate, especially for custom builds or classic truck enthusiasts.

5. **Available Parts & Support** Since this is a well-known GM truck, parts (especially for the 6.0L and 4L60-E) are widely available, and mechanics familiar with the model are common.

6. **Good for Heavy-Duty Use** If maintained, the engine and drivetrain can handle demanding tasks like logging, farming, or towing without major issues.

7. **Potential for Modifications** The 6.0L V8 is a popular choice for engine swaps (e.g., into older GM trucks or even muscle cars), and the Sierra s frame can support aftermarket upgrades.

---

#### **Cons**

1. **Fuel Efficiency Concerns** The 6.0L V8 is **not fuel-efficient**, averaging around **12-15 MPG combined**. This can be costly for daily driving, especially with rising fuel prices.

- **Valve body failures** (common in high-mileage units) can cause rough shifting or complete failure.

- **Torque converter issues** (slipping or overheating) may require replacement.

- **Fluid degradation** over time can lead to premature wear if not changed every **30,000-50,000 miles**.

3. **Electrical & Modern Tech Shortcomings** The Sierra 1500 from this era lacks modern safety features (no standard stability control, basic infotainment) and may have **electrical gremlins** (e.g., faulty sensors, wiring issues).

4. **Rust & Frame Concerns** Many older GM trucks from this era suffer from **frame rust**, especially in snowy or salted regions. A thorough inspection of the frame rails, subframe, and suspension is critical.

5. **Emissions & Modern Compliance** The 6.0L V8 is **not EPA-compliant for modern emissions standards**, meaning it may not pass smog checks in some states. Some states also restrict older trucks with high emissions.

6. **Discontinued Support** While parts exist, **warranty coverage is nonexistent**, and long-term repairs may be more expensive than newer trucks.

7. **Comfort & Modern Features** The cabin lacks modern amenities (poor sound insulation, basic climate control, outdated infotainment), which can be a drawback for daily drivers.

- **Rod bearing wear** (common in high-mileage 6.0L engines).

- **Exhaust manifold cracks** (especially on the passenger side).

- **Water pump failures** (can lead to overheating).

- **Suspension wear** (ball joints, bushings, shocks).

---

### **Ending Conclusion**

The **2006-2007 Chevrolet Sierra 1500 with a 6.0L V8 and 4L60-E transmission** is a **strong choice for buyers who prioritize towing power, durability, and classic truck appeal** but only if the vehicle has been **properly maintained**. It is **not ideal** for fuel-efficient daily driving, modern commuters, or those who want minimal long-term hassles.

**Low miles (under 150,000)**

**Regular transmission fluid changes**

**No frame rust**

**No major engine or drivetrain issues**

**A serviceable exhaust system**

then it can be a **great investment**, especially for work, towing, or restoration projects.

**High miles without service records**

**Visible rust or frame damage**

**Transmission slippage or rough shifting**

**Noisy engine (rod knock, valve train issues)**

then the **risks outweigh the rewards**, and a newer truck (even a used one) may be a smarter long-term choice.

---

### **Final Recommendation**

- **Buy it if:** You need a **heavy-duty towing/work truck**, are prepared for **potential repairs**, and can **inspect it thoroughly** (or have a mechanic do so). Consider it as a **project truck** rather than a daily driver.

- **Avoid it if:** You want **fuel efficiency, modern comfort, or low maintenance**. In that case, look at **newer trucks (2010 ) with diesel options or modern V6 engines** for a better balance of power and reliability.

- **Towing/hauling** (if maintained).

- **Classic truck restoration** (for enthusiasts).

- **Budget-friendly heavy-duty work truck** (if you can afford repairs).

- **Daily commuting** (high fuel costs, potential breakdowns).

- **Long-term lease/rental** (insurance and repair risks).

- **States with strict emissions laws** (may fail smog checks).

**Always get a pre-purchase inspection (PPI) from a trusted mechanic before buying.** If the transmission and engine are in good shape, this truck can be a **great value** but expect to **budget for future repairs**.

Details:

Transmissions: are warrantied to be in good working order against any slippage or shifting failures. Scan, record and clear all codes before removing original unit. SIERRA 1500 PICKUP 06 AT, 6.0L, 4L70E opt M70, 4x2, 6' 6 box, 07 AT; Classic creased door skin, SILVERADO box. Flush cooling system re-fill to proper level.

Replace oil, air and fuel filters. Useful Links. Install new filter kit. Install new spark plugs wires.

NOTE: Image shown may be the vehicle from which, part was pulled, or a generic image representing, typical stock, rather than unique item being sold. Airbags must be installed in accordance with vehicle manufacturers specifications. Daytime phone number is required load will not deliver until appointment scheduled. Flush and inspect cooling lines.

Items will not be released without it. Some listings include a warranty and others do not. Automatic Transmission Classic 6.0L Fits 06-07 SIERRA 1500 PICKUP 132410. They will not have any packaging included.

Que Beck: 5% GST 9.975% TVQ 14.975%, Ontario/New Brunswick/Newfoundland 13% HST, Manitoba 8% PST Nova Scotia 15% British Columbia 7% 12% Saskatchewan 10% All Other Canada Provinces 5% GST. Drain and replace engine oils to manufacture suggested levels. Scan, record and clear all codes before removing the original unit. An adult over 18 must be present for delivery.

Items marked Sold AS-IS are final sale with no warranty. Warranty Information:: Please review the listing for specific warranty details. Residential Address:Curbside delivery only. Airbags are not tested to meet any safety standards.

Replace valve cover gaskets. Buyer accepts all risk of damages/injuries if not installed properly. A daytime phone number is required to schedule the delivery. Adjust throttle position sensor cable.

All other parts included are considered accessories or extra. Replace all seals. Differentials: All internal lubricated parts within the drive axle housing are guaranteed in good working condition at time of purchase. Install new belts and hoses.

Fill transmission with manufacturer specified fluid. If needed, replace timing gears, chains or belts gaskets. Replace oil pan gasket and rear main seal. And engage torque converter into front pump.

Replace thermostat gasket. Used tires are not tested or labeled by MAS to meet any safety standards.

part #: 400-00188 price

• $883.99

specifications autotransmissionsgo:

• for models: 1500, Classic, Sierra
• for makes: Chevrolet
• for years: 2006-2007
• brand: Chevrolet Truck
• part type: Transmission
• conditions options: 6.0, At
• genuine oem: Yes
• ipn: 400-00188

general autotransmissionsgo:

• Car Truck Parts Accessories > Transmission Drivetrain > Automatic Transmission
• condition: Used

shipping autotransmissionsgo:

• class: Freight
• type: Fixed
• service: Flat Rate Freight
• cost: $0.00

returns autotransmissionsgo:

• paid by: Buyer
• time: 60 Days
• policy: Returns Accepted

offer autotransmissionsgo:

• started: February 13, 2026
• sold: 0
• availability: In Stock
• best offers: True
• quantity: 1
• options: Ship-to-home

payments autotransmissionsgo:

• credit card: Mastercard
• other
• wallet: Apple-pay

seller autotransmissionsgo:

• city: Camden, New Jersey
• # reviews: 4363
• rating: 98.8%

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