CHEVROLET Gm Wagon Fuel Gas Tank Steel Eec GM38B-M170

( Manufacturer Part Number: GM38B ), ( Type: Fuel Tank ), ( Capacity: 22 Gal ), ( Vintage Part: Yes ), ( Universal Fitment: No ), ( Placement On Vehicle: Rear ), ( Country Of Origin: Canada )

Review CHEVROLET Gm Full Size Wagon Fuel Gas Tank Steel Eec fits 1970–1974

The **Chevrolet GM38B (1970 1974) Fuel Gas Tank (Steel, EEC, GM38B-M170)** is a meticulously engineered component designed to serve as the primary storage vessel for fuel within General Motors iconic mid-sized wagon models from the early 1970s. Crafted from high-quality **steel sheet metal**, this tank is built to withstand the demands of daily driving while ensuring durability and reliability over the long term. The **EEC (Electronic Engine Control) designation** indicates that this particular model was engineered to meet the emissions and fuel system requirements of the era, aligning with GM s evolving standards for cleaner combustion and improved performance. Measuring approximately **170 cubic inches** in capacity (as denoted by the **GM38B-M170** designation), this tank is specifically tailored to accommodate the fuel needs of the GM38B engine family, which includes the **350 cubic inch V8** and other mid-sized powerplants found in vehicles like the **Chevrolet Chevelle, Caprice, and Monte Carlo wagons** from 1970 through 1974.

The design of this fuel tank reflects the engineering sophistication of its time, featuring **reinforced seams and welded joints** to prevent leaks and ensure structural integrity under varying road conditions. The **steel construction** not only provides robustness but also contributes to the tank s resistance against corrosion, a critical consideration for vehicles operating in diverse climates. The **EEC-compliant** nature of the tank suggests it may include slight modifications to the fuel pickup or venting system to optimize fuel delivery and emissions performance, adhering to the stricter regulations of the early 1970s. This tank is a direct replacement for the original equipment manufacturer (OEM) part, ensuring an exact fit with minimal modifications required during installation. Whether restoring a classic Chevrolet wagon to its former glory or maintaining a well-loved classic, this **GM38B-M170 fuel tank** serves as an essential component for preserving both the functionality and authenticity of the vehicle s original design.

### **Pros and Cons of Buying a 1970 1974 Chevrolet GM38B (GM Wagon) Fuel Tank (Steel, EEC, GM38B-M170)**

#### **Pros**

1. **Durability and Longevity** Steel fuel tanks from this era were built to last, often outlasting the vehicles they were installed in. Properly maintained, they can remain functional for decades, even when transferred to newer applications.

2. **Compatibility with Classic and Modified Vehicles** The GM38B-M170 tank was designed for the **Chevrolet GMC 3800 series trucks and wagons (1970 1974)**, but its design is also compatible with other **full-size GM trucks, vintage cars, and even some aftermarket builds** (e.g., hot rods, restomods). Its **38-gallon capacity** makes it suitable for high-mileage or performance applications.

3. **Ease of Repair and Modification** Unlike modern aluminum or composite tanks, steel tanks can be **welded, patched, or reinforced** if damaged. They also allow for **custom modifications**, such as adding fuel pumps, gauges, or even converting them for **alternative fuels** (e.g., ethanol blends, if properly treated).

4. **Availability of Parts and Knowledge Base** Due to their age, **GM38B-M170 tanks are still relatively easy to find** in the classic parts market, especially in the U.S. and Canada. There is also a **large community of mechanics and restorers** familiar with working on them, making troubleshooting and repairs more straightforward.

5. **Lower Cost Compared to Modern Tanks** A **used steel fuel tank** in good condition is often **cheaper than a new OEM or aftermarket aluminum tank**, especially if sourced from a salvage yard or private seller. This makes it an attractive option for budget-conscious buyers.

6. **Aesthetic and Nostalgic Appeal** For enthusiasts restoring **vintage GM vehicles**, using an original or period-correct fuel tank enhances authenticity. The **bulky, utilitarian design** of the GM38B-M170 fits well with classic truck and wagon aesthetics.

7. **Compatibility with Vintage Fuel Systems** The tank s **mechanical fuel pump design** (if original) works well with **carbureted engines**, which are common in classic vehicles. It can also be adapted for **modern fuel injection systems** with minimal modifications.

8. **Potential for Upcycling** Beyond automotive use, steel fuel tanks can be **repurposed for off-grid fuel storage, DIY projects, or even artistic installations**, adding value beyond their original function.

---

#### **Cons**

1. **Weight and Space Constraints** Steel tanks are **heavier than modern aluminum or composite tanks**, which can affect **vehicle handling, fuel efficiency, and cargo capacity** in modern applications. The **bulky design** may also require **modifications to fit in tighter spaces** (e.g., underbody installations in some cars).

2. **Corrosion Risk** While steel is durable, **rust and corrosion** are major concerns, especially if the tank has been exposed to moisture, road salt, or poor storage conditions. A **thorough inspection is essential** before purchase.

3. **Limited Modern Compatibility** Some **modern vehicles (especially those with fuel-injected engines or electronic fuel management systems)** may require **additional modifications** to safely integrate an older steel tank, such as:

- **Vapor recovery system adjustments** (if applicable).

- **Fuel line and gauge compatibility** (modern sensors may not work with mechanical systems).

- **Grounding and electrical safety checks** (to prevent corrosion-related shorts).

4. **Fuel Compatibility Issues** Older steel tanks **were not designed for modern fuel additives** (e.g., high ethanol blends, biodiesel, or reformulated gasoline). **Ethanol can degrade rubber fuel lines and seals**, potentially leading to leaks. A **proper fuel system flush and upgrade** may be necessary.

5. **Difficulty in Finding Original Parts** While the tank itself may be easy to source, **original fuel lines, gauges, and mechanical pumps** can be harder to find. Replacement parts may require **aftermarket or custom fabrication**.

6. **Potential for Leaks and Fuel Odors** Over time, **seals and welds can degrade**, leading to **fuel leaks, vapor buildup, or unpleasant odors** inside the vehicle. This is more common in tanks that have been **poorly stored or neglected**.

7. **Environmental and Safety Concerns** **Older steel tanks may contain residual fuel or contaminants** (e.g., leaded gasoline, rust particles) that could **pollute the environment** if improperly handled. **Proper cleaning and disposal of old fuel** is required before installation.

8. **Limited Aftermarket Support** Unlike modern OEM or aftermarket aluminum tanks, **there are fewer standardized upgrades or replacement options** for the GM38B-M170. Custom fabrication may be needed for **reinforcement, mounting, or fuel system integration**.

---

### **Conclusion**

The **1970 1974 Chevrolet GM38B-M170 steel fuel tank** is a **solid, durable choice** for **classic vehicle restorations, off-road builds, and high-mileage applications** where weight and longevity are priorities. Its **mechanical simplicity, ease of repair, and compatibility with vintage systems** make it a favorite among enthusiasts. However, **modern applications require careful consideration** especially regarding **weight, corrosion risk, fuel system compatibility, and safety modifications**.

If you are **restoring a 1970s GM truck or wagon**, this tank is an **excellent period-correct option**. If you are **building a modern vehicle or performance project**, weigh the **pros and cons carefully** modern aluminum tanks may offer **better weight savings and corrosion resistance**, but lack the **nostalgic charm and repair flexibility** of a steel original.

---

### **Recommendation**

You are **restoring a 1970 1974 GM truck/wagon** and want **authentic parts**.

You need a **durable, long-lasting tank** for a **high-mileage or off-road vehicle**.

You are **comfortable with mechanical repairs** and **modifying fuel systems**.

You can **inspect the tank thoroughly for rust, leaks, and structural integrity** before purchase.

You plan to **use it in a carbureted or simple fuel-injected setup** (not high-performance racing applications).

You are **building a modern vehicle** where **weight and corrosion resistance** are critical.

You need **OEM-level compatibility** with **modern fuel injection systems** (may require extensive modifications).

The tank shows **signs of severe rust, dents, or past repairs** without proper documentation.

You are **uncomfortable with welding, fuel system upgrades, or handling older fuel systems**.

- **Inspect for rust** (especially around welds and seams).

- **Check for leaks** (pressurize with air and look for bubbles).

- **Test the fuel lines and connections** (replace if cracked or brittle).

- **Consider a professional inspection** if unsure about structural integrity.

- **Plan for fuel system upgrades** (e.g., ethanol-resistant lines, modern gauges).

- **Store properly** (keep dry, use fuel stabilizer if long-term storage).

For **classic vehicle purists and those prioritizing durability over modern convenience**, the **GM38B-M170 is a fantastic choice**. For **modern builds where weight and ease of installation matter most**, a **new OEM or aftermarket aluminum tank** may be a better investment **but the GM38B remains a legendary, character-filled option for the right project.**

Details:

Manufactured from durable stamped steel, the tank is designed to match original dimensions and mounting locations for straightforward installation. Ideal for restoration or replacement. The tank includes the lock ring and sealing gasket required for fuel sending unit, helping ensure a secure proper seal. COMPATIBILITY: Fit Type: Vehicle-Specific Direct.

Finish: Natural Steel. Factory-style fuel sender opening. Corrosion Protection: Steel construction suitable for restoration use. Fuel Tank for 1970-1974 GM Full Size Station Wagons Steel Construction GM38B.

Includes lock ring and seal. Whats Included. Built as a direct-fit replacement, this tank restores proper fuel storage and delivery while maintaining the original factory configuration. Fuel Type: Gasoline.

Fitment should always be verified before purchase. This steel replacement fuel tank is designed for 1970-1974 GM full-size station wagons equipped with EEC systems. Key Features. Compatibility Notice.

Compatible with vehicles equipped EEC systems. TECHNICAL SPECIFICATIONS: Material: Stamped Steel. Does NOT fit sedans or coupes. Heavy-duty stamped steel construction.

Direct replacement design for classic GM wagons. Vehicle Fitment. Sender Opening: Yes. Design: Direct Replacement Factory Style.

Designed for select 1970-1974 GM full-size station wagons. Does NOT fit GM A-Body or B-Body passenger cars. Important Notes. Fits Full-Size GM Station Wagons only.

Common compatible vehicles include: 1970-1974 Chevrolet Caprice Wagon1970-1974 Kings wood Townsman Brook wood Pontiac Catalina Bonneville Oldsmobile Custom Cruiser Buick Estate Wagon. Please verify your vehicle year, model, and tank configuration before purchasing to ensure proper fitment. It is an excellent solution for replacing rusted, damaged, or leaking fuel tanks during classic vehicle restoration repair. Tank Construction: Heavy Gauge Steel.

Designed for model's equipped with EEC.

part #: gm38b prices

• $151.20-$309.99

specifications fueltanksysteme:

• for makes: Chevrolet
• for years: 1970-1974
• mpn: Gm38b
• type: Fuel Tank
• capacity: 22 Gal
• vintage part: Yes
• universal fitment: No
• placement on vehicle: Rear
• country of origin: Canada

payments fueltanksysteme:

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

offer fueltanksysteme:

• started: March 5, 2026
• options: Ship-to-home
• sold: 0
• quantity: 1
• availability: In Stock

shipping fueltanksysteme:

• carrier: UPS, FedEx
• cost: $96.42
• transit: 4-9 Days
• type: Calculated
• class: Standard
• service: UPS Ground, FedEx Ground / FedEx Home Delivery

general fueltanksysteme:

• condition: New other see details
• Car Truck Parts Accessories > Air Fuel Delivery > Fuel Tanks Filler Necks

returns fueltanksysteme:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

seller fueltanksysteme:

• # reviews: 24
• city: Kissimmee, Florida
• rating: 100.0%

Chevrolet GM38B Is Similar To:

• Aftermarket Replacement Gallon Fuel Tank For Chevrolet Cavalier Pontiac Grand (22.4% similar) The items are brand new parts that look and fit same as original, except at a much better price...(January 22nd, 2019)
• 10295393 Keystone Automotive Operations New Fuel Filler Neck Fits Chevrolet Lumina (14.5% similar) FedEx USPS will not accept any damage claim if the receiver have sign for package...(June 12th, 2018)
• 10337264 Gm Chevrolet Genuine Fuel (30.5% similar) Buyer pays return shipping costs. Parts must be resalable and in the original packaging. Shipping carrier substitutions may be made at our determination in an attempt to reduce cost the customer. Electrical parts are not returnable...(November 18th, 2017)
• 10830d Stant Fuel Tank Cap Chevrolet Silverado Pu Dsl (23.4% similar) ...(April 30th, 2018)
• 10852 Stant Oe Equivalent Fuel Cap Fits Chevrolet Corvette (19.7% similar) OE equivalent fuel cap fits chevrolet corvette standpipes is for 1 - adjust qty as needed. Most items are shipped directly from our supplier to you. Stock is updated nightly, so it possible that an item shows in but was already sold. The item specifics section also contains important details...(April 25th, 2018)
• 10957858 Aftermarket Replacement New Fuel Tank Fits Chevrolet Gmc (17.4% similar) Product fit: direct fit color finish silver notes without seals the free shipping or price quoted in our listing is for areas continent of USA only 48 states. 2l 134CID83, 85 GMC S15 sierra classic 6CYL 9l 119CID85 chevrolet S10 drongo 4CYL 9l 119CID85 chevrolet S10 Tahoe 4CYL 2l 134CID83, 85 GMC ...(March 23rd, 2019)
• 11506 Chevrolet Locking Gas Fuel Cap Chevy Gmc New (38.8% similar) New in package ready for resale or you if needed is your fuel getting missing. Kid down the street. Ain't going to chance it worked hard keep...(February 26th, 2018)
• 12458241 Gm Chevrolet Oem 1999 Corvette-fuel (31.3% similar) Est, Mon to Fri...(February 28th, 2017)
• 12822125 Aftermarket Replacement New Fuel Tank Filler Neck Gas Chevy Chevrolet (11.1% similar) The items are brand new parts that look and fit same as original, except at a much better price...(April 16th, 2018)
• 13405022 Unbranded Gallon Fuel Tank For Chevrolet Blazer Silver 723650612132 (23.8% similar) Comes with mounting straps. The tank is to big for my application. This fuel tank is new, never used, however it has some scratches on the bottom from trying to fit my '72 C10 frame...(May 10th, 2018)
• 13419211 Perfect Fit Gallon Fuel Tank For Chevrolet Caprice 646621890431 (19.2% similar) Please for any questions. Each warranty gives you specific rights, and may have other rights which vary from state. Some manufacturers require that you register your product to activate its warranty. The manufacturers warranty shall be exclusive remedy for any such product defect or failure...(September 22nd, 2018)