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i have a 97 c5 and i am getting codes p01518 c1255 c1278 and b2723 b0508 u1064 goes to reduced power and service traction control as soon as i put it in gear one code i had i might not mentioned deals with the ignition switch. before getting codes my wipers stopped working most of the time my oil pressure shot to 80+ psi cant go half mile without traction control light on and reduced power message. I am not sure if the TAC module should be replaced or EBTCM or ignition switch ??? any help with this would be great i am at a loss and i am an infinity technician been auto tech for over 23 years! please help
Did you buy the car like this or did all these codes just start showing up at the same time.
Some common things to check -
Battery- low battery causes many odd issues with C5s
Chassis ground points- there are 13 I think. One of the sticky posts at the top of the forum has a diagram.
Three bladders at the base of the windshield get clogged with debris and can fill up with water and leak onto the wiper motor control board, shorting it.
I did not buy the car like this i have been driving it nearly a year and has gotten worse the past two months i had a lady run into me leaving the dealership i work at as a tech took to body shop hit the car left front corner not too bad going 5 mph since getting the car back it started right away. they had to replace the left front headlight cover and bumper & cover
I also lost wiper control they work now and then and my oil pressure pegged at 80psi and the idle has been fluxuating and had a vacume leak at brake booster fixed that
I should also mention one of the codes delt with the ignition switch and the steering has never really locked and you can crank it and then pull the key while its running not sure if that matters< thank you in advance for any help i am lost here!!!!!
Thank you to bill !! I was about to give up on my problems with my 97 c5 but bill helped me out i will find that fuse and post a picture of it!! Car is running great now