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Installed "new" used rear struts and now more problems?

2471 Views 17 Replies 7 Participants Last post by  ponyboyt
So I scored some rear struts off a 99 STS with 75k on it, installed them on my car (99 sts with 150k) and they work perfectly. BUT Now "service suspension, service stability system and service idle control" all pop up on my DIC. They never showed up until I installed the struts, I've checked and checked all the wiring, air lines ect.. all are fine. I'm hoping it's something simple if all of these popped up at one time, but I don't have a clue where to start, I've cleaned all ground locaions, unhooked the battery to reset everything, no change. Car is running fine (besides randomly blowing etc fuse?) Only codes are : C1721, C1722, C1782, P0550, P1520. All are history, but when I clear all the codes and take a drive they all come back and still pop up history. Any ideas? thanks for your help!
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Also forgot to mention (if it helps) it feels like the ABS is kicking in when I touch the brakes and sometimes ABS and TRACTION CONTROL lights will light up on the actual gauge cluster (not on the DIC) but they go away as soon as I shut the car off.
Their stock GM, and if I can find another set I will. Do the 2000+ devilles have the same ones? thats the only other car close to an sts in the junkyard.
My old ones had HUGE cracks in them that you could almost stick your finger into. I got a new air compressor (for the struts) and 2 struts for $30, so there was NO way I could'nt take them with me.
oops haha, well The compressor kicked on sometimes, maybe like 3 times in the past 2 months so I put another used one off the same sts I got my struts off of and it works fine. Can the compressor throw codes too?
damn. haha. Is there any way of resetting the CVRSS? and resetting KAM?
UPDATE: I fixed a broken wire so the service suspension ordeal is gone, but now the whole thing with the TCS and ABS warning lights has gotten worse, My brakes sometimes randomly will feel like the abs is kicking in, and when taking off at a red light or stop sign my car thinks I have no traction and will almost feel like it's "bogging" down? So I'm no expert at this, but I assume this probly has something to do with the EBTCM? Current codes are:

C1255 - EBCM internal malfunction
U1064 - loss of communications with DIM
C1288 - steering sensor circuit malfunction
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