I have installed two different forum-recommended aftermarket intercoolers in the past two weeks on my 2007 GXP. Each of the intercoolers piped and bolted up just fine (after some minor plastic air guide/shroud trimming as advised by each manufacturer), but the darn front fascia does not fit properly over either one. In each case, the intercooler extends below the bottom of the fascia by over one inch.
I now believe that I know why. I researched my problem yesterday on this and other kappa sites, and now I realize that my OEM intercooler is different than most. My 2007 GXP was built in August 2006, and my original OEM intercooler does NOT have a condensation tube at the bottom. From what I've read, GM apparently stopped production of the GXP for short time right after initial start-up to correct a problem caused by water condensing inside the intercooler. Condensation collection tubing was added to the OEM intercooler and (apparently!) the fascia and shroud beneath the intercooler were slightly modified to accomodate the increased size of the modified OEM intercooler.
Thus my problem! I have to replace my "non-condensation collection tube" OEM intercooler (it is badly "ballooned"), and the aftermarket offerings I've tried will not accomodate my (August 2006 manufactured) 2007 GXP fascia. At least now I know why I'm having this problem...I was really stumped as to why others on this forum who have replaced their OEM intercoolers weren't having this issue, and why the manufacturers I spoke to prior to purchase(s) didn't foresee an issue.
LatinVenom, I saw that you had the same OEM intercooler as I have. Is it still installed? Just wondering if you may have had to replace it and what you did...
Rob The Elder, I know you have alot of GXP knowledge and expertise...any thoughts?
I'm going to call the vendor(s) and see if they can possibly make me a smaller intercooler (my OEM is 6-1/2" high at the core, their aftermarkets are about 8-3/8"). I've also thought about having my OEM re-cored if possible (as a last resort). The only other options I see are (1) just to let the intercooler hang below the current fascia or (2) replace the darn fascia!
I bought my 2007 GXP new in October 2006, and until yesterday did not know that there was a factory intercooler modification done to most GXPs that were manufactured after mine. I had a couple of instances when my car ran really rough but then cleared up, and I had chalked it up to bad fuel. It could be that I had the intercooler condensation problem. It hasn't happened in a LONG time though (mine is garage kept with low miles, so maybe that has something to do with it too).
Thanks for reading, and thanks in advance for any advice you might offer. Maybe this post will help somebody else too...I know the issue had me frustrated, and 2 mechanics that came over to look at the problem were stumped also.
I now believe that I know why. I researched my problem yesterday on this and other kappa sites, and now I realize that my OEM intercooler is different than most. My 2007 GXP was built in August 2006, and my original OEM intercooler does NOT have a condensation tube at the bottom. From what I've read, GM apparently stopped production of the GXP for short time right after initial start-up to correct a problem caused by water condensing inside the intercooler. Condensation collection tubing was added to the OEM intercooler and (apparently!) the fascia and shroud beneath the intercooler were slightly modified to accomodate the increased size of the modified OEM intercooler.
Thus my problem! I have to replace my "non-condensation collection tube" OEM intercooler (it is badly "ballooned"), and the aftermarket offerings I've tried will not accomodate my (August 2006 manufactured) 2007 GXP fascia. At least now I know why I'm having this problem...I was really stumped as to why others on this forum who have replaced their OEM intercoolers weren't having this issue, and why the manufacturers I spoke to prior to purchase(s) didn't foresee an issue.
LatinVenom, I saw that you had the same OEM intercooler as I have. Is it still installed? Just wondering if you may have had to replace it and what you did...
Rob The Elder, I know you have alot of GXP knowledge and expertise...any thoughts?
I'm going to call the vendor(s) and see if they can possibly make me a smaller intercooler (my OEM is 6-1/2" high at the core, their aftermarkets are about 8-3/8"). I've also thought about having my OEM re-cored if possible (as a last resort). The only other options I see are (1) just to let the intercooler hang below the current fascia or (2) replace the darn fascia!
I bought my 2007 GXP new in October 2006, and until yesterday did not know that there was a factory intercooler modification done to most GXPs that were manufactured after mine. I had a couple of instances when my car ran really rough but then cleared up, and I had chalked it up to bad fuel. It could be that I had the intercooler condensation problem. It hasn't happened in a LONG time though (mine is garage kept with low miles, so maybe that has something to do with it too).
Thanks for reading, and thanks in advance for any advice you might offer. Maybe this post will help somebody else too...I know the issue had me frustrated, and 2 mechanics that came over to look at the problem were stumped also.
