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When I purchased my 07 it had codes P0171, P0174, P0430. Previous owner had installed an SLP X-pipe. I started down a long road of trouble shooting and info seeking. I signed up for a SCT tuner with an etune service, I data logged a bunch and sent in for review. Replaced all 4 O2 sensors, 430...

Does anyone have a vacuum line diagram/schematic for an 07 gtcs? I've got a vacuum leak that's near impossible to find... The cars been smoke tested twice, once to find, then to confirm found leaks fixed. Then I vacuum tested the EVAP circuit and brake booster and repaired as necessary. Still a...

Wisconsin here. Just waiting for the rain to wash the salt away, street sweeper was through last week temps in the 30-40 degree F area. Using my time for part installs and intake maint. Cold rubber can make for an interesting drive.... Maybe mid April/May.