| I would check all fluids, change filters, and if that doesn't work, contact dealer like someone else said. I do know though, when I'm in tow haul mode, my truck shifts hard.
__________________  RIDE: 2007 Chevy CC LBZ / 6 speed LIFT: Ready Lift Leveling Kit STARTER: VIPER 2 Way w/Turbo Timer SOUND: Pioneer P4000DVD - 6 1/2 Polk Audio everywhere else. ADD ONS: H1 Halo Projector headlights, Backup Camera, Dee Zee running boards, Chrome Grill, ExTang Solid Fold Tonneau Cover, Line of Fire w/reverse, custom bug shield/vent shades, TomTom GPS TIRES/WHEELS: 285/75-16 Firestone MT Tires on 16x8 ATX series Teflon Coated Wheels AIRFLOW: BANKS Monster Dual Exhaust, EGR blocked & CAT removed with MBRP replacment pipe and BANKS Ram Air. PROGRAMMERS: BANKS 6 Gun PDA w/Speed Loader --STACKED-- with Quadzilla Stealth 2 | 
Linear Mode
