AL Locking Diesel Fuel Cap for 96-18 Freightliner Cascadia Columbia 03-37017-002
AL Locking Diesel Fuel Cap for 96-18 Freightliner Cascadia Columbia 03-37017-002
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Aluminum Locking Diesel Fuel Cap for Freightliner
This aluminum locking diesel fuel cap (replaces OEM 03-37017-002) fits Freightliner Cascadia and Columbia models from 1996 to 2018, providing a keyed seal that prevents fuel theft and tank contamination.
Overview
The aluminum locking diesel fuel cap secures your Freightliner’s diesel tank with a rugged keyed closure. Designed specifically for Cascadia and Columbia trucks built between 1996 and 2018, this locking diesel fuel cap replaces fragile factory caps and deters siphoning. Fleet and owner-operator drivers rely on it to keep fuel costs down and protect the fuel system from debris and tampering.
Built For Performance
- Heavy-gauge aluminum construction resists corrosion and cracking
- Keyed lock cylinder includes two keys and prevents unauthorized removal
- Precision thread matches OEM filler neck for a leak-free seal
- Vented design maintains proper tank pressure and prevents vacuum lock
- Quick quarter-turn installation with no special tools needed
- Tether strap retention keeps the cap attached during fueling
Fits These Machines
- for Freightliner Cascadia 1996–2018
- for Freightliner Columbia 1996–2018
On-The-Job Use
- Long-haul and regional diesel tank protection against fuel theft
- Fleet trucks that park in unsecured yards overnight
- Construction and dump truck applications where dust and debris risk is high
- Owner-operators who want a direct, durable replacement for a broken cap
- Any Freightliner with a saddle tank that benefits from a locking fuel cap
Specs At A Glance
| Material | Aluminum |
| Lock Type | Keyed (2 keys included) |
| Part Number(s) | 03-37017-002 |
| Finish | Corrosion-resistant clear anodized |
| Thread | Matches OEM fill neck specifications |
| Compatibility | Freightliner Cascadia & Columbia 1996–2018 |
Good To Know
Q: Does the cap come with keys? A: Yes, two keys are included and the lock is pre-set; replacements can be cut from the key code at most locksmiths.
Q: Will this locking cap cause a check engine light? A: No, the vented design maintains the correct fuel tank vapor pressure and will not trigger evaporative system fault codes on Freightliner Cascadia or Columbia models.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.
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