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How to identify the correct GM part number radio head unit by model year, and then install the correct original factory radio into a final generation Chevy Cavalier. As well as how to clear the Delphi / Delco radio CAL ERR message that will often come up by using a GM Tech2 scan tool in these J-Body cars.
The CAL ERR can come up as a result of swapping an used class II RDS radio that has been refurbished or reset by a radio reseller (such refurbished radios EEPROMs are often back to a like new state and need initial setup using the GM dealer class Tech2 tool). The "CAL ERR" (Calibration Error) is one of TWO types of error messages you may encounter installing a replacement Delco radio, the other far more common one being "LOCKED" (which is the far more common error message you get from installing an used salvage yard radio). Both error messages relate to a portion of the vehicles VIN stored in the radios' EEPROM chip detected by the body control module (BCM) as having changed by your moving the radio between vehicles (which btw prompts me to point out you CANNOT clear a CAL ERR with a radio being caused by its EEPROM chip having been physically removed from the circuit board in a "hack" attempt to VIN unlock the radio previously). So this VIN relearn procedure is only for an unmodified original radio as shipped by GM.
While actually only illustrating the CAL ERR, the information and procedures in this video would also work on clearing the LOCKED error. The LOCKED one is the error message I actually was expecting to encounter when I started making this video, but got the CAL ERR instead. Go figure. Sometimes labelled a "VIN Relearn", the actual Tech2 step to clear either condition varies by model year and make. For these 2003 - 2005 J body cars it's called "Radio Setup" on the Tech2 menu and is described on page 11-122 of the GM J car service manual for 2004. The Radio Setup step is all that should be required, but it is always a good idea to also update the SPS (Service Programming System) calibration to the latest level also (think of it like updating the firmware on your smartphone). I show that as well using the TIS2000 software on a Windows PC with the Tech2.
The Tech2 Radio Setup procedure will configure the following, according to the GM service manual:
- LEARN VIN
- Diagnostic Trouble Codes
- Class 2 Radio Messages
- Country Code
- Chime Volume
- Chime Level
- 12/24 Hour Clock
While this video is performed on a 2004 Chevy Cavalier, it would be directly applicable to ANY 2003 2004 or 2005 Cavalier. The upgraded radio shown is RPO US8. The process would be indirectly applicable to many GM vehicle with the RDS type Delphi Delco Electronics class II radios used from 2000 thru 2005 in many Chevrolet, Pontiac, and Oldsmobile vehicles (the radios physical cosmetic design must appear similar to the ones I show in this video to be applicable). Of course, everything shown on the Tech2 and TIS2000 could also be done with Tech2Win using a GM MDI scan tool and TIS2Web instead.
The eBay and Amazon search links below are paid links, for which I may be compensated and earn a commission, if you choose to buy the parts and tools shown in this video thru them:
If you happen to be looking for one of these J car radios: ebay.us/6QMRAv
All compatible GM radio part numbers by RPO for 2003 - 2005 model year J cars only:
UM7 - 10315115
UN0 - 10335223 superseded by 10346316
U1C - 10315119 superseded by 22732926
US8 - 10348717
A GM dealer will charge you anywhere from $50 to $125 to do this Tech2 radio setup procedure, for not much more you can buy your own clone Tech2 scan tool and save money down the road: ebay.us/ZGCI6O
And if I've saved you some $$ here, consider some coins for the coffee tip-jar! ko-fi.com/drshock
Chapters:
0:00 - Problem overview
0:21 - Dash disassembly
10:42 - Radio removal
12:54 - Selecting compatible factory radios
19:48 - Using Tech2 to clear CAL ERR
23:09 - Using Tech2 to update radio calibration
26:04 - Radio testing
#drshock #cavalier #tech2
Disclaimer: DrShock, the alias for the human content creator for this KZfaq channel, is not responsible for any damages, injuries, losses, or liabilities associated with any repairs, upgrades, or maintenance performed on yours, or any other, vehicle whatsoever. No warranty, express or implied, is made as to the accuracy or completeness of any information provided within this channel. Viewing and using the “as-is" information of this channel is totally at your own risk. Always wear personal protection equipment and follow appropriate vehicle manufacturer service manual guidelines with original manufacturer parts only when performing any repairs, upgrades, or maintenance upon any vehicle.