Check , click Apply, and run the installer. Step 3: Identify the COM Port Plug your USB programming cable into the PC.
Input your continuous tone-coded squelch (CTCSS/DCS) codes here to eliminate interference from other users sharing the frequency.
Files found on forums or "updater" sites often contain malware or corrupted drivers that can "brick" your radio.
The UPD (Universal Programming Device) link for Motorola GM338 programming software is:
Given its age, the software is widely shared by the radio enthusiast community. The following are some of the most reliable community sources: motorola gm338 programming software download upd link
While the software is old, it generally runs on Windows XP, 7, 10, or 11, though Windows 10/11 might require compatibility mode or driver updates for the USB cable. Basic Programming Steps for GM338
The Motorola GM338 operates on the Professional Radio series platform (often referred to as the Waris platform). Unlike modern APX or MOTOTRBO digital radios that use unified software suites, legacy analog mobiles like the GM338 require specific versions of the Professional Radio CPS.
Are you using a or an older serial DB9 cable ?
| Error Message | Solution | | :--- | :--- | | ERROR: Model Mismatch | You tried to write a VHF codeplug to a UHF radio. Obtain the correct codeplug. | | Checksum Failed | The codeplug is corrupted. Read the radio again immediately without saving. | | Communication Timeout | Your baud rate is wrong. Force COM port to 9600, 8-N-1. | | DLL Missing (MSVBVM50.DLL) | Install Visual Basic 5.0 Runtime from Microsoft. | Check , click Apply, and run the installer
What (Windows 10, 11, etc.) are you installing this on?
: Sometimes, authorized dealers or distributors for Motorola products may provide software downloads or links to purchase programming tools.
When downloading and using the Motorola GM338 programming software, keep the following tips and precautions in mind:
Assign specific functions (like scan, squelch, or nuisance delete) to the front panel programmable buttons. 2. Motorola GM338 Programming Software Download Link Info Files found on forums or "updater" sites often
"Finally found a working link that actually handles the latest firmware updates. The installation was straightforward, and it recognized my radio immediately via the RIB-less cable. If you’re looking for the updated CPS , this version is stable and covers all the signaling features. Five stars for saving me the headache!" Option 2: Short & Direct (Best for download portals)
Before making any changes, click File -> Save As and save a backup copy of the original codeplug file ( .per or .dat ).
To get official, virus-free software, the legitimate path is to register a business account on the . While legacy analog software is increasingly difficult to source commercially from Motorola, authorized two-way radio dealers can often provide the correct archive versions (such as PMVN4082 or HVN9025 suites) to legitimate fleet owners. Hardware Requirements for Programming
The GM338 is primarily an Asia-Pacific model designation. You will typically need the Professional Radio CPS AZ (Commonly versions like PMVN4034 or PMVN4039). LA Region (Latin America): Known as the PRO5100. AA Region (North America): Known as the CDM1250. EMEA Region (Europe/Middle East): Known as the GM360. Where to Download: