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  1. MPG loss after aftermarket parts install

    Cadillac ATS Performance Forum
    I put in an aftermarket air intake and exhaust system onto my 2016 ATS and now I’m getting about 5mpg anytime I’m hitting the gas to accelerate. I’m not putting my foot down or anything like that and the turbo is producing around 5-8 psi of boost. I’m wondering if there might be an issue with...
  2. 1992 Eldorado aftermarket parts ?

    Cadillac Seville / Cadillac Eldorado Forum
    I have a 92 Eldorado I'm looking to do a few modifications on. The exhaust is fairly rusty so I'd like to replace the cats and catback piping. The suspension could also use an upgrade. My thinking is that there's probably a similar era GM car with aftermarket parts that can also be used in this...
  3. 05 esv Bose digital no nav looking into changing to aftermarket

    Cadillac Escalade, EXT and ESV Forum - 1999 - 2006
    So just curious what the best harness is I want to keep factory amp want to keep everything but OnStar I'll keep it if I have to but idc and I'm running a line converter now to my subs and I hooked in behind cd changer to the sub wires and it just doesn't sound good at all should I be hooking in...
  4. 93 Fleetwood hearse radio bypass location

    RWD 19xx-1984 DeVille and Fleetwood,1985-1996 Flee
    Hi all, I just got my first Cadillac Fleetwood Commercial Hearse, and the tape deck is shot. I was hoping to add a dual din radio with a backup camera for the joys of parking this behemoth. I have found that the radio bypass is necessary as the factory radio has a black 4pin and a blue 9 pin...
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