tI've replaced the fan unit,temp.sending unit,thermostat,rad cap,water pump. Checked the rad. for being clogged(found nothing),checked the flow of coolant through the system and found that there is proper ,flow,checked for broken head gasket,checked cylinder head and engine for loss of compress(found nothing),checked vacuum(found within tolerance).What do I do now. The engine lite comes on within 2 minutes of reset. I check with my computer which has system for checking OBD systems and the same lite-code showes up. what do I do now --- Flash the computer? or what.
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2003 Chevrolet Trailblazer
Question: I've had this problem over the last 4yrs.
what is the code?
ReplyFred H, July 13, 2012, 07:25Rookie
Greg the code that keeps comming up is 1481,fan speed,like I said I,ve done all the nessery steps to correct it and still this cod keeps comming up. Should I flashthe computer?
Replyglobalhelper, July 13, 2012, 08:15Master
no have it diag by a mech and get more info
ReplyFred H, July 13, 2012, 08:21Rookie
I am a mechanic and I have all the equipment to diag. Like I said even when I take it to other mech. They come up with the same code (1481) and don't have any other answer, than buy a reconditioned computer,install and have a shop flash it. My original question was, is this going to cure the problem,it's a lot of money to put out on a guess. OH buy the way I guess you didn't read my profile before you made your answer and you didn't read what has been done to try to make the repair.
Replyglobalhelper, July 13, 2012, 10:01Master
i found the diag procedure in all data if u would like it give me your fax # and il fax it to u. not sure if it will fix the problem since im not sure what u have tested on the procedure.
Answer #2Chevy Power July 13, 2012, 12:59Journeyman
They have a lot of problems with the cooling fan wiring harness. GM issued a bulletin for the issue No.: 05-06-02-012B.