Please include the year,make,model,sub-model,engine,2wd,4wd,flex,gas,diesel. Please click accept when done, thanks and come back often.
So I can look at wiring diagrams, is this a HD or not and a 2wd or 4wd. Also, on the factory cd/cassette player, is that the Base/Uplevel Radio - Uq3/Uq5, Luxury Radio - Uq7 W/Y91 or the Premium Radio - Uq7 W/O Y91?
On the new one, do you have the make, model number?
Did you hold down 2 and 3 for at least 6 seconds?
2004 Chevrolet Silverado Z-71, 1500 LT gasoline 4wd Extended Cab, 5800 eng
Old one Part #15138489
New one Replacement Part # XXXXX
Held 2 and 3 down for more than 6 seconds and up to 1 minute on another try
Ok, as far as the radio locked, here is all the info I could find out so far. It appears though they are assuming that you can retrieve the code though, not anything yet as far as pressing 2 and 3 not working. While I continue to search for that answer and also the heater fan now continues blowing let me give you this that I have so far. Hopefully when I find the problem it will fix both.
For an article on Unlocking Gm radios, click here.
After the code is learned then follow this,
So far I found out that The 15138489 is the GMC Single CD / with Cassette Delco / Delphi Electronics GMC Safari.The 15184935 is the GMC Single CD / No Cassette Delco / Delphi ElectronicsGMC Sierra.Now, on the old system I have 3 possible systems that it was, you could look maybe in the glove box for the rpo code. It should be a Uq3 or Uq5 for the base system. The Uq5 appears to be a 4 SPKR SYS.
Or it could be rpo code Uq7 which is the Luxury which is a bose so it's not that cause I know it's a Delphi. So that only leaves the rpo code Uq3 or the Uq5. The other was just another Bose Uq7 without Y91.
Here are the wiring diagrams.
For the manual blower, click here.
For the manual blower power, click here.For the automatic blower, click here.For the Digital Radio Receiver, click here.For the Digital Radio power ground, click here.
If you just simply plugged it in in place of the old one, I don't see anything that could be causing the heater blower ton run except that they share the same ground G203. Try disconnecting that ground for now and see if the blower fan at least turns off. If so it may be a poor ground and it is backfeeding into the entertainment system for a target to ground.
Plus, does the cd player read lock or loc?