What 56499005 Actually Is
The 56499005 is a bracket, not the guard bar itself. It is the steel structure that transfers load from the deer guard back into the Peterbilt 579 front frame mounts. Material is steel with a gray finish. On this application it lives behind and below the bumper, which is why most people never see it until something goes wrong.
Construction is 2mm steel on standard builds, with 304 stainless used on premium versions. Finish is powder-coat or polished stainless depending on the build. Both are meant to survive road salt and washouts without peeling or rusting through at the weld seams, which is where a cheap bracket usually lets go first.
It bolts to factory frame mounts. No drilling, no welding, and the install is reversible if the truck goes back to a bare bumper for a trade. That matters on a lease unit where you need the front end back to stock spec at turn-in.
Why 56499005 And FIT-016AS33 Match
FIT-016AS33 is the cross-reference number for this same bracket. Different catalogs, different sequencing logic, same physical part. When a supplier builds a bracket to a specific truck's frame mount pattern, the hole spacing, offset, and plate thickness are fixed by the truck — not by whose sticker is on the box. That is why two numbers land on one part.
The Peterbilt 579 front frame mount pattern is what governs here. Any bracket that fits it has to put its holes in the same place and carry load along the same path. Change either one and the guard sits crooked or the mount cracks. So the interchange is structural, not a marketing decision.
Treat the cross as an identification starting point, not a fitment promise. Confirm against the number stamped or tagged on the bracket you are pulling off, or verify by VIN. If the truck has been through a front-end repair, the bracket on it may not be what the build sheet says.
Check Before You Order
Pull the old bracket and look at the mounting ears. A deer strike usually bends the bracket before it bends the frame horn, which is the point of the design. If the ears are elongated at the bolt holes or the plate is dished, replace it — a straightened bracket has already yielded and will fold again at a lower load.
Inspect the frame mounts themselves while the bracket is off. Look for elongated holes, cracked paint radiating from a bolt boss, or a mount that sits proud of the rail. If the frame is damaged, a new bracket will not sit square and you will chase flutter at highway speed. Fix the frame first.
Note whether the truck runs the steel or stainless version, and check what hardware came out. Reuse of stretched bolts is a common repeat-failure cause. Bring the old bracket number and the VIN when you order so the application can be confirmed against your specific unit.
56499005 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to 56499005. Use them to identify the part — then confirm the exact fit by VIN or the number stamped on your old unit before you order. An interchange is a starting point, not a fitment guarantee.
| Brand / Line | Cross-Reference Numbers |
|---|---|
| Cross-Reference | FIT-016AS33 |
Frequently asked questions
Is 56499005 the same part as FIT-016AS33?
They cross to the same deer guard bracket for the 2018-2024 Peterbilt 579. The numbers come from different catalog systems but describe one physical part with the same mount pattern and load path. Verify against the number on your old bracket or by VIN before you order, since front-end repair history can change what is actually on the truck.
Do I have to drill the frame to install this bracket?
No. It bolts to the existing factory frame mounts on the 579, so no drilling and no welding. The install is reversible if you need to return the truck to a bare front bumper later. If the holes do not line up, stop and check the frame mounts for prior collision damage rather than forcing the bracket.
Can I straighten a bent deer guard bracket instead of replacing it?
Not recommended. Once the steel has yielded in an impact, its load capacity is permanently reduced and it will deform again at a lower force. Elongated bolt holes and a dished mounting plate are both replace-only conditions. Check the frame mounts at the same time, because a bracket that bent hard may have passed load into the frame horn.
Not sure it fits? We check before you pay.
Run your VIN and we’ll match parts to your exact truck, or call the counter — a person who knows trucks verifies fitment by OEM number before the order ships. No wrong-box returns.
More cross-reference guides
Need the part, not just the reading?
Every part below is a Premium Quality aftermarket Direct Replacement with published OEM cross-reference numbers, a 6+ month warranty and same-business-day shipping from Tacoma, WA. Not sure it fits? Run your VIN — or call and a person who knows trucks will verify fitment before you pay.