Why Is the Radio Asking for a Code?
The Ram 5500's Uconnect 4C activates anti-theft after any power interruption. Severe-duty chassis cab owners see this primarily due to:
- Battery replacement during service — primary cause. 5500s carry heavy electrical loads that wear batteries faster.
- Commercial upfit electrical work — these trucks get heavily upfitted which often requires disconnecting the battery, triggering the lock.
- A failed radio fuse — frequent in commercial vehicles.
- Buying pre-owned without a known unlock code.
The code is derived from the radio's serial number — not the VIN.
Can't Locate Your Unit's Serial Number? Follow The Steps Below for Ram 5500 2023
Very important fact to know is that factory radios use a specific S/N to identify each unit.
Your anti-theft system links the code directly to the serial.
Different from car-specific data such as VIN or registration info, it is not determined by the model or production year, so you'll be able to retrieve it even if you have an aftermarket radio.
Depending on the maker and radio installed in your Ram 5500, the retrieval method is different.
Here are the best ways to locate it.
Which Head Unit Is in Your 2023 Ram 5500?
For 2023 the Ram 5500 runs the Uconnect 5 infotainment platform as standard across SLT and above (with Uconnect 4 retained on the very base Tradesman/base Chassis Cab in some markets). Uconnect 5 introduced wireless Apple CarPlay and Android Auto, five user profiles and a much faster processor compared with the Uconnect 4 hardware it replaced.
Uconnect 3 / Uconnect 4 (sales code UAG) - 5-inch base touchscreen, retained on the lowest Tradesman/base Chassis Cab build only. Visual ID: small 5-inch screen with conventional climate controls below.
Uconnect 5 with 8.4-inch display (sales code UBL) - 8.4-inch landscape touchscreen with wireless Apple CarPlay and Android Auto, optional GPS navigation. Visual ID: 8.4-inch glass with the Uconnect 5 home grid (multiple user profiles, large widgets) instead of the older Uconnect 4 tile layout.
Uconnect 5 NAV with 12-inch display (sales code UBQ) - 12-inch portrait touchscreen with built-in GPS, wireless Apple CarPlay and Android Auto. Standard on Limited and optional/standard on Laramie depending on the build. Visual ID: large vertical 12-inch glass with split-screen and the Uconnect 5 interface.
Quick test for 2023: a 5-inch screen with the older Uconnect interface means UAG, an 8.4-inch landscape screen with the new Uconnect 5 home grid means UBL, and a tall 12-inch portrait screen running Uconnect 5 means UBQ.
Screen-Based Serial Lookup Method
Try the following for your 2023 Ram 5500:
The 2023 Ram 5500 largest-class chassis cab features the Uconnect 4C (RA4) 8.4" touchscreen in the commercial cab. The serial number is retrievable via Dealer Mode:
- Turn ignition to ACC or ON.
- Press the bottom-left and bottom-right corners of the physical screen bezel (plastic frame, not glass) simultaneously for 5 seconds.
- Dealer Mode opens on the display.
- Navigate to: System Info → Radio Part Info → Serial Number.
Note Dealer Mode may be restricted on some 2023 5500 units after a software update. If the bezel press fails, physical removal is the fallback.
Manufacturer Label Inspection
If the serial does not appear in menu, the next step is checking the radio itself.
Many Ram radios require physical access to the serial tag attached to the unit.
Usual approach:
- Start by completely turning off the engine - pull the key out.
- Then remove the radio surround.
- Next, unscrew the mounting points and slide the radio forward.
- Look for a printed tag showing the serial number.
If Dealer Mode is unavailable on your 2023 Ram 5500, the radio must be removed to access the serial label:
- Turn off the vehicle.
- Remove the center stack trim with a plastic pry tool. The 5500's heavy-duty cab trim uses friction clips – work from the lower edge.
- Unscrew the mounting screws (Torx T20 or T25).
- Pull the unit forward to access the serial label on the side or top of the chassis.
Wiring don't need to be unplugged while you note the serial.
Ram 5500 Hardware Label Method
The factory radio in the 2023 Ram 5500 also carries a printed barcode/sticker label on the chassis. On the fifth-generation DT HD dash the head unit (especially the 12-inch portrait UAX/UBQ) sits inside a wide centre-stack bezel that integrates the screen surround with adjacent climate and storage trim, so the work needs to be done methodically.
Safety first: turn the ignition fully off, remove the key fob from the cabin, disconnect the negative battery terminal and wait at least 10-15 minutes before touching wiring so the SRS/airbag capacitors can discharge. Avoid yellow airbag/SRS connectors entirely and use plastic trim tools so nothing shorts or breaks.
Tools you will need: plastic trim/panel removal kit, T20 Torx bit, Phillips #2 screwdriver, 7mm socket and short extension, flashlight, clean microfibre to rest the bezel on.
Removal overview (2023 Ram 5500 dash): lift the rubber beauty pad on top of the centre stack to expose two T20 Torx screws and remove them; lift the rubber mat in the small cubby behind the 120V outlet to expose a third T20 Torx screw and remove that as well. With those three screws out, pull the centre-stack bezel rearward starting at the lower edge to release the spring clips around its perimeter. The bezel carries the hazard/HVAC switches, so unclip those harnesses before setting it aside on a clean cloth. Remove the four 7mm screws securing the radio cage to the dash support bracket, then slide the head unit straight rearward and disconnect the antenna lead and the multi-pin power/data connectors at the rear.
Where the serial sits: the serial number is printed on a barcode/sticker label on the top or one side of the radio chassis, alongside the part number and supplier markings. Photograph the label up close and double-check ambiguous characters such as 0/O, 1/I and B/8 before submitting the value.
Tips and professional advice: the 12-inch UAX/UBQ portrait head unit on the 5500 is deeply integrated into the wider centre-stack trim and shares hardware with the climate cluster, hazard switch and 120V outlet bezel - if the trim resists, stop and double-check for hidden screws rather than pulling harder. Owners who are not comfortable working around airbag wiring or releasing the wide integrated bezel should have a professional installer or dealer technician remove the unit instead; an experienced shop typically completes this in well under an hour.
Example: Ram 5500 serial number label location
Serial Number Format Guide for 2023 Ram 5500
The 2023 Ram 5500 Uconnect 4C (RA4) serial number formats:
T00AM– Harman Uconnect 4C (primary prefix)T00BE– Continental variantT0MYD– Newer Harman production (2020+)
Radio designation: RA4 (Uconnect 4C, 8.4"). Serial: 14 characters. The Ram 5500 chassis cab uses the same RA4 infotainment as the 3500 and 4500.
Important The serial is not the same as the part number (P05064... or 68...). Only the 14-char serial generates the code.
S/N Patterns and Prefixes
The factory radios fitted to the 2023 Ram 5500 are predominantly Uconnect 5 head units (with Uconnect 4 retained on the base 5-inch UAG only). The serial style follows the standard Mopar/Uconnect convention, with the exact prefix driven by the supplier and software build of the specific unit, so any pattern below should be treated as a guide rather than a strict rule.
Uconnect 5 8.4-inch (UBL) and 12-inch (UBQ)
Typically a 14-character alphanumeric string printed on the chassis barcode label.
Often begins with T (for example T00-prefixed Mitsubishi Electric builds) or with A2C on Continental-built modules.
Printed as a continuous run of letters and digits, with no spaces or dashes.
Uconnect 3 / Uconnect 4 5-inch (UAG, base only)
Usually carries a Mopar/Visteon or Panasonic-style serial on the chassis sticker, so the printed label on the unit itself is the authoritative reference.
Copy the serial exactly as printed and avoid guessing characters that look unclear.
Step-by-Step Ram 5500 2023 Radio Code Retrieval Guide
- Skip long troubleshooting discussions or service visits - you can generate the code online with the radio S/N.
- Identify the serial number. It is always present on the unit itself, and sometimes it can be visible on the 5500's display.
- Type it into the form above, and our system will generate the correct 2023 5500 unlock code.
- When you receive the code, type it in using 5500's radio controls to unlock the system fully.
- The entire process takes just a short moment and requires zero paperwork and no dealer visit.
Radio Code Input Guide
Once you receive the correct unlock code based on the serial number, you can restore normal functionality by entering it into the unit.
The code entry process depends on the radio interface, but most 2023 5500 systems follow a similar structure using preset buttons, touch controls, or rotary knobs - depending on if it's a factory or an aftermarket unit.
You will typically see CODE displayed on screen.
The Correct Way to Enter It
Entering the unlock code on the 2023 Ram 5500's Uconnect 4C:
- The 8.4" screen displays "ENTER CODE" after a battery event.
- Tap the touchscreen keypad to enter each digit of the 4-digit code.
- The radio restores after the 4th digit – nothing else needed.
Lockout Warning: 3 wrong attempts = 60-minute lockout. Keep ignition ON. Cycling the ignition resets the timer.
Understanding Unlock Issues with Your 5500
The Uconnect 4C serial on the Ram 5500 is accessible via Dealer Mode (System Info → Radio Part Info → Serial Number) or on the barcode sticker on the unit housing after removal. Serial: 14 chars starting with T00AM, T00BE, or T0MYD.
Ignore the part number (P05... or 68...) on the same label.
The Ram 5500's Uconnect 4C enters lockout after 3 wrong entries. The screen continues to display "ENTER CODE" but blocks all input.
To reset: Keep ignition ON for a full 60 minutes. Turning off restarts the countdown. Fleet-managed vehicles must complete the full wait without interruption.
No code prompt means the Uconnect 4C hasn't triggered. Force the lock: pull the radio fuse and reinsert it, then turn ignition ON. The prompt appears on startup.
The Ram 5500's Uconnect 4C uses touchscreen-only code entry — press each digit on the on-screen number pad. No physical preset buttons are used. The radio unlocks after the last digit.
A rejected code on the Ram 5500's Uconnect 4C typically indicates a serial number error. The RA4 label shows the serial (T00AM, T00BE, or T0MYD, 14 chars) and the part number (P05... or 68...) — only the serial generates the code.
Heavy-duty labels can be worn or dirty. Take a photo and zoom in to verify each character. Reach out for a free re-check if needed.